bluuebunny/crossref_metadata_2025 huggingface dataset:
The Research on the Planning of Distributed PV Systems in Connection with Urban Distribution Network
Authors: Wang Jing
Published: October 2014

For the capacity and the location of the photovoltaic power generation in the urban distribution network, this paper adopts LSI(Loss sensitivity index) to determine the access to the location of photovoltaic power generation system. At the same time, we put forward a kind of multi-objective programming methods for the distribution network, which adopts three sorts of indices including LOI(Loss optimization index), EOI(Environmental optimization index) and VQI (Voltage quality index) as a multi-objective function. Therefore, an auxiliary search space is built in this paper to improve BPSO(binary particle swarm algorithm), in order to solve the complicated nonlinear optimization problem. And through the simulation verification IEEE-30, the simulation results show that this method can realize the optimization of distribution network system configuration.
Research on Point Estimate Method and its Application to Calculation of Grounding Current under DC Bias
Authors: Mao Zhao Lei , Deng Guo Jun , Chen Guang , Zhou Hao
Published: October 2014

When calculating the grounding current under DC bias, there are many uncertainties. Then an efficient calculation method based on point estimate method is proposed. This method can make the results more reasonable because it takes into account the uncertainties of input quantity and conditions. This paper will value the grounding resistances as variables, and use the point estimate method for the calculation of the grounding current under DC bias. The results are proved to be more realistic and satisfactory.
Distribution Disciplines and Cause of Harmful Elements in Copper Tailing Sand
Authors: Liu Xu Qing , Xia Shi Bin , Yuan Hao , Cai Zhong Li
Published: October 2014

Measure content of fresh tailing sand in a certain skarn type copper mine selection tailing sand warehouse, lead, cadmium, arsenic, nickel and zinc elements, etc in old tailing sand by ICP-AES. Carry out eluviations test of tailing sand and leaching test of tailing sand by horizontal vibration method and Sulphuric-Nitric acid method respectively. Discuss with phase constitution of harmful elements such as arsenic in tailing sand by XRD analysis chromatogram of tailing sand. Compare with content analysis result and mineral constitution of related elements in raw mine on the basis. Research migration and distribution disciplines of associated harmful elements in raw mine to tailing sand by floatation. Test result shows that arsenic, zinc, cadmium and lead elements in raw mine deeply concentrated in tailing sand after mine selection. Percentage is 96.89%, 92.0%, 91.65% and 41.12% respectively. Main existence form of As in tailing sand is FeAsS (arsenopyrite). It intergrowth with pyrite (FeS2); Zn mainly exists in a ZnS (sphalerite) form. Pb, Cd and As have migration trend from upstream to downstream of tailing sand warehouse and from shallow layer to deep layer. Dissolution rate of Cd, Cu, Zn, Cr and Pb under eluviation and weak acid leaching conditions is lower. However, they have release trend under acid conditions. Arsenic element is special as follows: It is undetected in various points during Sulphuric-Nitric digestion. However, tiny detection of fresh surface layer and deposit layer out of old tailing sand by horizontal vibration method prompts stability of arsenic tailing sand FeAsS and alarm of leaching activity under alkaline conditions. Cause of arsenic tailing sand FeAsS is that it is brought by raw mine without large destruction to FeAsS during mine selection process.
Space Effectiveness Analysis of Urban Natural Ecological Network
Authors: Gu Xin Yi
Published: October 2014

Space effectiveness is to measure the effectiveness from the perspective of spatial structure. The space effectiveness of urban natural ecological network affects the urban natural ecological environment directly. Accessibility, liquidity, and supportiveness of "network-like" structure are key factors to the space effectiveness. Therefore, the key to optimize space effectiveness of natural ecological network is to maintain the space support structure that affects key effectiveness factors.
Study on Interspecific Coordination Effect within the Entrepreneurship Ecosystem
Authors: Guan Xiao Li , Gao Biao
Published: October 2014

Based on basic ecological and entrepreneurial theory, the purpose of this study was to explore the coordination between specifics in entrepreneurship system. A survey study was conducted to collect data from 362 effective entrepreneurs. The result of this research implied that coordination between enterprises and government, research institutes, and risk investment affected growth performance significantly; however, coordination between enterprises and government done not affect profit performance. Meanwhile, coordination between enterprises and research institute and risk investment affected growth performance more than profit performance. Therefore, we should be considering adding some index of profit performance and promoting the identification ability of project in the late stage of policy implementation. At the same time, the entrepreneurial enterprises should find a stable cash flow to realize the fast development,and reduce the risk of capital operation and increase market liquidity in the largest degree.
Study on New Urbanization Construction and Ecological Environmental Protection
Authors: Zhang Shang Bing
Published: October 2014

New urbanization construction inevitably results in some environmental problems which have negative impact on the development of rural economy and social development. Therefore, we should pay attention to environmental protection in the course of urbanization. This article mainly studies the development prospect of new urbanization concerning “developing the ecological economy and improving the urban environment quality”, “ensuring the ecological protection and practicing economy”, “promoting the development of circular economy in the course of urbanization construction” and “strengthening the ecological environment monitoring and information management”. Then propose some suggestions to the environmental protection of new urbanization construction.
The Mechanism of Activated Sludge Flocculation under Al3+ Dosin
Authors: Zheng Wan Lin , Cao A Sheng , Wen Yue , Chen Hai Rong , Zhou Qi
Published: October 2014

The mechanism governing activated sludge flocculation under Al3+ dosing was studied in this paper. Activated sludge was cultivated in sequencing batch reactors (SBR) at 22°C. Batch dosages of Al3+ were 0.00, 0.125, 0.5, 1 and 1.5meq/L respectively, and continuous dosage was 0.1meq/L. As batch dosage increased, the total interaction energy, zeta potential and turbidity tended to decline, which suggested that batch dosing promoted sludge flocculation. Under the equivalent dose, the zeta potential of continuous dosing was higher, while the LB-EPS content showed the opposite tendency and turbidity reduction was similar. Both batch and continuous dosing promoted flocculation performance: in terms of interaction energy, batch dosing was more effective; while in terms of EPS, it was on the contrary.
On the Water Ecological Civilization Construction and Strategic Measures of the Sustainable Utilization of Water Resources in Shiyang River Basin
Authors: Zhang Sheng Wu , Shi Pei Ji , Li Hui
Published: October 2014

Recently Shiyang River Basin in China has been the area with greatest population density, highest utilization level of water resources, least per capita water resources, most striking conflict on water use and most serious ecological problems among inland river basins due to the overexploitation and out-of-order utilization of water resources with rapid social and economic development. The Key Control Plan of Shiyang River Basin was published in 2007, which raised the comprehensive control of Shiyang River Basin to the national level. On the basis of comparison analysis on the utilization of water resources and water ecological civilization construction since the key control of Shiyang River Basin, the strategic measures on the sustainable utilization of water resources are proposed.
The Correlations Dimension of Lilium regale Spatial Patterns
Authors: Yang Zi Song
Published: October 2014

In this paper, the correlation dimension of the population distribution of L. regale were analyzed by fractal theory. The results show: (1) The fractal characters in different areas are obvious; (2)In most cases, the correlation dimension of L. regale population are so high ranged from 1.4664 to 1.7384, indicating higher individual spatial correlation degree and little difference of the scaling properties of spatial autocorrelation of individuals in different plots; (3)Irregular distributions, and great difference of scaling; (4) Ten correlation dimensions of L. regale are changing as the latitude regularly decreases or increases.
Empirical Study on Utilization Benefit of Cultivated Land in Changsha
Authors: Tang Jin Hua , Li Ying Hui , Li Hui
Published: October 2014

In order to realize the status of cultivated land resources in Changsha and to protect cultivated land resources. According to output benefit coefficient, consumption and return coefficient, population and substitution coefficient and intensive cultivation coefficient, cultivated land utilization benefits were quantitatively analyzed in Changsha from 2002 to 2011. The results showed that: the trend of the quantity of cultivated land was upward in general in Changsha. But the quality of cultivated land decreased. At the same time, the output benefit of arable land was good in 2004, 2006 and 2008, but the rest of year was lower, and the tendency was dropping. On this basis, the effectiveness of the strategies was improved to use of arable land resources.
New Technology of Surface Subsidence Control and Environmental Protection Research in Coal Mining Region
Authors: Jiang Cheng Rong , Yang Liu , Xie Hao , Huang Hua Yi , Sun De Ke
Published: October 2014

In combination with the geological conditions of Tie'er mining area in Tangshan coal mining, this paper not only analyzes the evolution of overlying strata structure in stope and the development law of overlying strata separation, also proposes a new continuous grouting technology with large flow and high concentration slurry. The industrial test showed that, when the grout-mining ratio of the whole mining area is 25.3%, the reducing subsidence ratio is 51.5%, the effect of reducing the surface subsidence is good. According to the chemical analysis of water quality ingredients of slurry, the test result showed, heavy metals contents in fly-ash slurry water do not exceed the standard, which has no bad effect on the fissure water in the bedrock.
Research and Application of the Type about Rapid Prototyping Mold Bag Retaining Wall Applied to Filling Stope Drift Ends
Authors: Tian Jin Zhou , Yan Bing Shuang
Published: October 2014

Coal mining and filling connection is very fast in continuous mining and filling working face. How to build airtight walls at ends of filling stope drift efficiently is one of the bottleneck problems, which restricts production improving in continuous mining working face. This paper presented a design idea of the rapid prototyping mold bag wall, analyzed its structure, did much research and finally provided the design. Field application showed that it improved construction efficiency and reduced cost.
Research on the Influence by Different Dip Angles Faults of the Damage Height of Superincumbent Stratum
Authors: Fan Zhen Li
Published: October 2014

For the issue of fault impact on the height of water-flowing fractured zone, the study worked out several damage heights of superincumbent stratum under the influence of different dip angles faults. The research shows that small angle fault influence area is apt to develop a wide range of the plastic zone,and the water-flowing fractured zone of high-angle fault influence area is apt to increase along the fault surface and breakover the aquifers of coal seam roof and floor.
CSR-deNOx with CO over Supported Pd Catalysts under Lean Conditions
Authors: Li Ying Hua , Bai Lu , Zhao Fei , Zou Ji Ying , Liu Hui , Zhang Yu
Published: October 2014

The catalytic selective reduction of NOx with CO over Pd/Al2O3 and Pd/TiO2/Al2O3 under lean conditions (called SCR-deNOx in simple way) was studied here. The performance of the catalysts with different Pd loadings for deNOx was investigated. The results showed that the 2.0 wt.% Pd/TiO2/Al2O3 and 1.5 wt.% Pd/Al2O3 catalysts displayed optimum deNOx activities of 46% and 20% at 200°C, respectively. TEM, XRD, XPS and SEM were utilized to characterize the catalysts. Metallic palladium is thought to be the active site which highly dispersed on the catalyst supports. The synergy between TiO2 and Al2O3 or Pd is thought to be the reason for the obvious improvement in deNOx process.
Study on the Strategy of Nonferrous Metallurgy Industry Development in Gansu Province
Authors: Li Rong Hua , Wang Cui Lin
Published: October 2014

under the strategy of invigorating western provinces and autonomous regions with industrialization impetus, nonferrous metallurgy industry scale in Gansu expands unceasingly; Technology and equipment improve constantly;Industry integration trend becomes obvious. From the view of industrial competitiveness, non-ferrous metallurgy industry and mineral resources in Gansu has a comparative advantage in the country, the comprehensive advantages of leading enterprises is obvious, but there are also some problems,such as product structure contradiction, low resources and energy utilization rate,the hign pressure of energy conservation and emissions reduction. Then author put forward non-ferrous metallurgy industry development strategy: to extend the industry chain, optimize the product structure; to increase investment in research and development, to increase innovation capacity ; to adjust the organization structure,to realize the production of industrial cluster; to promote cleaner production, to realize circulation economy and so on.
Research and Application of KCL Drilling Fluid Technology
Authors: Wu Jun Kang , Xu Hou Ying , Dong Wan , Xie Yu Ning , Zhou Xiao Yu
Published: October 2014

In ord to solve the hole collapse problem of mud shale in LiaoHe Oilfield,further research and improment of KCl drilling fluid was conducted.and promotion in mine house, two South Beach Sea and other regions, to prove that the strong anti-sloughing drilling fluid system capacity, accident low, Liaohe Oilfield meet the needs of sloughing shale.
Production Characteristics Study of Tight Gas Reservoir with Network Fracturing Using Numerical Simulation
Authors: Liu Guang Feng , Hou Rong , Li Shu Sheng , gao yan , Wang Jun Tao , Li Xue Jiao
Published: October 2014

Differences of physical properties between matrix and fractured region, size of fractured region and production allocation all affect production characteristics and development effect of fractured gas wells. Building a numerical simulation model of fracture network dual porosity, we studied impacts of these factors in contrast of programs of different parameters. Larger stimulated reservoir volume and higher permeability of fracture network result in good well performances but no meaningful increase in gas production when reaching a certain degree. Therefore, optimization suggestions of size and physical properties of stimulated reservoir volume as well as production allocation are proposed.
Quantitative Analysis of Blowout Risk in Production Platform: A Fuzzy Fault Tree Approach
Authors: Liu Bao Zhan , Wei Wen Pu , Duan Meng Lan , An Wei , Lü Yan
Published: October 2014

Fault tree approach is a widely used for importance and risk assessment. This paper analyses the blowout risk in production platform by a fuzzy fault tree method. This method is appropriate for the situation that lack or incompleteness of data. The judgements from experts can be quantified by using this framework. Analysis process is introduced. It establishes a fault tree including a top event and 13 basic events. The top event is blowout. Through analysis, 15 minimum cut sets are obtained and the fuzzy failure probability and single definite probability values are calculated. Finally, the probability of blowout risk in production platform is 5.67×10-4.
Effect of Bap on the Expression of Cx43 in Leydig Cells
Authors: Li Huan , Zhang Yi , Jin Shu Guang
Published: October 2014

Polycyclic aromatic hydrocarbon (PAHs), espically benzopyrene (BaP),are the most popular pollutants in surface water,and the adverse effects on male reproductive function have aroused more and more attention. The objective of this study is to confirm BaP regulates testosterone (T) in adult rat Leydig cells and then deserve the effect of BaP on Cx43 between Leydig cells, in order to explore whether the influence of Bap on Leydig cells is via its effect on Cx43. Established the primary culture system Leydig cell, Primary cultured Leydig cells were incubated in the different concentrations (1;10;50ug/ml) of BaP, and DMSO control group. After culturing 24h, the expression of Cx43 on cell membrane were investigated with immunofluorescence and the total Cx43 were evaluated by Western blotting.. The results indicate: comparing with the control group, the expression of Cx43 are suppressed by Bap in a dose-response relationship.
Assessment about Development Level of Low-Carbon Economy in Resource-Based City
Authors: Zhang Wei Hua , Zhang Jian Hua , Li Rui
Published: October 2014

In recent years, the phenomenon that global is becoming warmer, natural disasters occur frequently, natural resources and energy are decreasing more and more seriously affects the survival of mankind and the normal production and other activities. In this context, the concepts of “low-carbon economy”, “low-carbon city”, and “low-carbon technology” come into world attention, and low-carbon economy become the main direction of transformation of the resource-based city gradually. Therefore, studying problems about developmental level evaluation and strategies of low-carbon economy for the resource-based city has become an important research topic of scholars both at home and abroad.Facing the low-carbon economic development model, under the background of fully understanding the research status of the resource-based cities at home and abroad and low-carbon economy, the author sum up some problems which the resource-based cities need facing in sustainable development, and put forward concrete solving countermeasures. In order to guarantee the low-carbon economy developing better, the author found a low-carbon economy evaluation index system which suit for the resource-based city, on the base of following the principle of low-carbon economy evaluation index system setting up and the latest evaluation standard. Then taking Daqing city as an example, the author analyses the status of economic industry development in Daqing city and the obstacles existing in the low-carbon economy development of Daqing. At last, it screens 34 secondary indexes, and applies FAHP and DEA method to evaluation. The model gives full play to the features that FAHP can effectively reduce the index weight of subjectivity and DEA is easy to operate and can adjust to the original inputs, and provides theoretical guidance for resource-based cities develop low-carbon economy. Finally, the author submits specific promoting strategies for the resource-based city develop low-carbon economy, which can offer references for the sustainable development of the resource-based city.
Sustainable Development of Leisure Sports Tourism under the Low-Carbon Economy
Authors: Liu Pei Hua , Chen Xue
Published: October 2014

Low-carbon sports tourism is a new form of sports tourism developed in the background of economic restructuring, whose development prospect is promising. In this paper, low-carbon economy, sports tourism and leisure sports are briefly outlined, the factors that restrict the low-carbon sports tourism are analyzed, and some countermeasures for development of low-carbon leisure sports tourism are put forward, so as to realize the low-carbon sports tourism sustainable development.
Environmental Protection and Economic Development: You Can't Have your Cake and Eat it too - With the Purpose of the Environmental Law for Perspective
Authors: Wu Ting Ting
Published: October 2014

" Science and technology with law " is the world's environmental protection experiences lessons. Our country's current environmental protection law has been unable to effectively solve the increasingly serious environmental problems.The environmental protection law " dualism " ,which claiming that economic development and environment protection coordinated development ,is the shield of environmental pollution and waste of resources . Through comparing and analyzing of our country's , United States' and Japan's current environmental law legislation purpose and the effect of the practice by case , puts forward query to environmental law legislation 'purpose dualism' , further presents '"purpose monism" that taking "protecting environment, maintaining ecosystem " as the basic value orientation.
Perspective of Environmental Protection for Sustainable Development and Legitimacy of Enterprises
Authors: Zhou Li Jun
Published: October 2014

Environmental protection is an important concept of sustainable development. As the main player of sustainable development, enterprises should pursue the ecological, economic and social sustainable development and take social responsibility for the harmonious development of the society and environment. Under the consideration of environmental protection and sustainable development, enterprises should behave environmental friendly to obtain the legitimacy from constituencies. Based on the theme of environmental protection, this paper introduces and discusses the literatures related to sustainable development and legitimacy of enterprises.
The Changing of Climate Determined by Silicon
Authors: Yang Dong Fang , Zhu Si Xi , Wang Feng You , He Hua Zhong , Wu Yun Jie
Published: October 2014

Due to the serious lack of silicon in the ocean and the continuous increase of atmospheric carbon, the atmospheric and water temperature is rising. Silicon is the determining factor of climate change. This paper presented the theory of the earth’s ecosystem, and the complementary mechanisms of silicon, and revealed that the earth’s ecosystem maintains the dynamic balance of temperature by means of the complementary mechanism of silicon.
The Cooling of the Earth Determined by Orogenesis
Authors: Yang Dong Fang , Wang Feng You , He Hua Zhong , Wu You Fu , Zhu Si Xi
Published: October 2014

Based on the theory of the earth’s ecosystem, this paper analyzed the essence and results of orogenesis. We found that, in order to supply abound silicon to the ocean, to accelerate the growth of phytoplankton and decrease the atmospheric carbon, the earth’s ecosystem started up the regulatory mechanism of orogenesis. As a result, both atmospheric and water temperature were decreased. It was found that all of the glaciers were occurred after the major orogenesis, confirmed the correctness and the long lasting of the theory of the earth’s ecosystem, the power of silicon, and the complementary mechanisms. This research deepened the understanding of the earth’s ecosystem.
Health Risk Analysis for Pb Exposure of Human from Indoor Dust in Shenyang
Authors: Jin Dan , Zheng Dong Mei , Sun Li Na
Published: October 2014

The aim of this work was to study Pb accumulation in indoor dust, and health risk of human due to dust exposure. Risk assessment of Pb to human health: Pb is most harmful to human body. The reasons of non-carcinogenic risk in residential area may be that indoor is not swept regularly, in addition, indoor decoration, building materials and other factors may also affect the content of Pb in dust. Non-carcinogenic risk in children is not only more than adults but also beyond the safety threshold. Indoor dust has been a threat to the health of children in Shenyang.
The Influence of Environment Air Pollution on the Respiratory Health among Pre-School Children
Authors: Zhao Chun Shan , Xu Min , Li Chun Guo
Published: October 2014

The aim of this study is to influence of air pollution on the respiratory health among pre-school children. The cluster sampling method was adopted. Based on the testing results in Jilin City over years, the city was divided into light, medium and heavy pollution area. We selected two nursery schools from each area, all the children in these selected nursery schools are the object in this study. The incidence of cough, sputum and wheezing is 42.9%, 32.1%, 16.1%, 18.5% respectively among pre-school children in Jiln City, it is higher in medium and heavy areas. Staying near the street raises the incidence of respiratory problems. Those children who have the family history asthma and individual allergic constitution are at higher risk of respiratory disease incidence. Ambient air pollution is the influence factor of pre-school children’s respiratory health.
 New Method of Determiner of the Position of Lightning Stroke Point by Using Dynamic Analysis
Authors: Wu Hao , Huang Yong , Quan Yu Sheng , Shi Pu Xin
Published: October 2014

This paper summarize the existing method that can explain the lightning shield failing and put forward a new method to analyze the development of the leader and the upward leader. By using time-varying electromagnetic field analytical method. Solve the dynamic potential at the streamer zone in the bottom of leader. Give a simulation analysis for the dynamic potential and find the trend grow in exponential form. Deduce the electric field and the magnetic field from the dynamic potential in time-varying electromagnetic field.
Application of Optimized Parameters SVM in Deformation Prediction of Creep Landslide Tunnel
Authors: Liu Yu , Zhang Yu Xin
Published: October 2014

Creep landslide tunnel deformation is a diversity,changeability, less information, complicated nonlinear problem, it’s unable to establish accurate mathematical model.A creep landslide tunnel deformation prediction model based on SVM was constructed in this paper to enhance prediction accuracy, and penalty parameter c and Kernel function parameter g of SVM were optimized by genetic algorithms (GA).nine closely related factors in creep landslide tunnel deformation were selected as Input vector of SVM , creep landslide tunnel deformation measured value as a model target output. In Matlab 2011b simulation software,80 groups observation data from 2012 to 2013 of Laoyeling tunnel in Changchun to Hunchun highway of Jilin province as the sample data, 70 groups were used as training set, other 10 groups were used as testing set. The simulation result shows that testing value is very close to the true value in this method, the average relative error close to 2%. Effectiveness of the creep landslide tunnel deformation prediction based on GA_SVM model is verified by experiments.
Determination of Dihydroxybenzene Isomers in Wastewater Samples at Poly(Glutamic Acid) Modified Glassy Carbon Electrode
Authors: Wang Chun Yan , Qi Ying Xin , Liu Xiao Qiu
Published: October 2014

A simple electrochemical method has been developed for the simultaneous determination of dihydroxybenzene isomers in wastewater samples with poly (glutamic acid) modified electrode (PGA/GCE). PGA/GCE was fabricated by electropolymerization of glutamic acid on a glassy carbon electrode (GCE) through cyclic voltammetry (CV). PGA/GCE showed an excellent electrocatalytic ability towards the oxidation of hydroquinone (HQ) and catechol (CC). With CV and differential pulse votammetric (DPV) measurements, HQ and CC in wastewater samples could be simultaneously analyzed at PGA/GCE. The linear range for HQ and CC were 5 - 100 μM and 2 - 160 μM, with a detection limit of 2.0 μM and 1.0 μM, respectively. Moreover, PGA/GCE exhibited good selectivity and repeatability. The method has a promising application in the monitoring of HQ and CC of wastewater.
Evaluation and Content of Various Heavy Metals in the Bohai Bay (China) during the Autumn
Authors: Wang Hong Wei , Cai Duan Bo , Fu Zhong , Zhao Chun Long , Zhu Na , Zhao Wen Bo , Lu Shan Shan
Published: October 2014

There were 48 sea water samples collected from Bohai Bay (China) in autumn, 2013. In surface water the heavy metal content from high to low was Cu, Zn, Cr, As, Pb, Cd, Hg, as Zn, Cu, Cr, As, Pb, Cd, Hg in bottom water. Cr and As were up to the first class value of the seawater quality standard except Zn and Cu.
Management of Ecological Real Estate - A Method of Biodiversity Analysis in Water
Authors: Shi Kun , Zhou Liang Liang
Published: October 2014

Ecological real estate is a re-definition of green building, with its broad conception and inherent realities of social and economic development in the world nowadays. As planning, construction and management of ecological real estate in China is still in the preliminary stage, a method of biodiversity analysis in natural water bodies of real estate is established as a technical way of ecological real estate management.
Study on the Risk Analysis and Emergency Measures to the PX Projects of Dalian Dagushan which Impact on the Marine Environment
Authors: Zhang Jun , Lin Jian Guo , Zhang Han
Published: October 2014

By investigating and analyzing PX demand in recent years and the distribution of PX projects in Dagushan chemical industrial park, combining its physical and chemical properties and marine environment near Dalian Dagushan, aim to make environmental assessments on the damage caused by PX to the marine environment and propose appropriate emergency measures.
The Analysis of Crude Oil Nature’s Impact on Oil Pipeline Underground Divulging Pollutant Migration
Authors: Wu Guo Zhong , Wang Yu , Qi Han Bing , Zhou Ying Ming , Li Dong
Published: October 2014

The oil pipeline burying divulging pollutant was taken as the object of study in this paper, the heat transfer and mass transfer process of which in the soil porous medium were carried by the numerical analysis. The oil phase change for multiphase flow leakage process for buried pipelines for oil, gas and water in the low temperature was considered, and the impact on multiphase leakage process of high and low viscosity of the oil phase viscosity properties was analyzed. It cited multiphase pipeline leak by using Fluent at different times during the course of the earth temperature field , the oil / water phase distribution , surface temperature, and the results showed that : there existed a big difference between the multiphase flow leakage process surface temperature changes and porous medium heat and mass transfer processes with the conditions of high viscosity and low viscosity conditions . Therefore, the impact of the physical properties on buried oil pipeline leak process at low temperatures is great.
Water-Quality Assessment on Butterfly Lake in Guangdong Ocean University, China
Authors: Liu Ya Yun , Chen Zi Kun , Ren Ke Jun , Jia Yan , Guo Yue Xian , Zhu Jian Hua
Published: October 2014

Butterfly Lake provides an important function of ecological environment and campus service for Guangdong Ocean University. Based on the data which were collected in March,May, September and December in 2013, the water environment quality of Butterfly Lake was assessed. The results show that the key pollutant of Butterfly Lake is total phosphorus (TP). The average concentration of TP is worse than the national quality standards for Class V. The water quality appears an obvious difference in different monitoring time. In September the water quality is the best. The average of single parameter pollution index (Sj) is 0.75 and the water quality belongs to good environment area. The average of integrated parameter pollution index (WQI) is 1.76 and the water quality belongs to light pollution area. In December the water quality is the worst. Sj and WQI is 1.14 and 3.14. The water quality belongs to light pollution area and moderate pollution area, respectively. The comprehensive trophic state index is 70.38 in December. The eutrophication level is hyper eutropher. The other monitoring time belongs to middle eutropher. In order to improve the water quality of Butterfly Lake,the valid measure is to strengthen the management of wastewater discharge from the laboratory and the dormitory.
Investigation on Air Quality in Strawberry Greenhouse under Natural Ventilation
Authors: Fu Wei Hong , You Shi Jun
Published: October 2014

The effect of the air inlet and the air outlet of the strawberry greenhouse are very significant to the microclimate in greenhouse under the conditions of natural ventilation. This paper studied the numerical simulation and experiment of indoor temperature field of the strawberry greenhouse with natural ventilation in different areas of air inlet and air outlet. The impact of the natural ventilation on the microclimate of strawberry greenhouse has been explored. The results indicated that the air velocity and temperature in the air inlet effected on the temperature distribution within the greenhouse, and the temperature near the air inlet was susceptible to the outdoor environmental parameters. The general trend of the variation of the indoor temperature in the greenhouse decreased with increasing the sizes of the air inlet and the air outlet. The overall trend of temperature gradient is similar within the greenhouse.
Measurement System Research on Micro-Arc Oxidation Load Feature
Authors: Liu Hong Yang , Yang Wei , Han Ji Ye , Yang Shi Yan
Published: October 2014

Micro-arc oxidation has become a focus of research on the surface of metal processing. But do not understand the load characteristics of the application of the micro-arc oxidation. In order to get the load characteristics of DC power supply which work in the process of micro-arc oxidation, a muti-waveform frequency sweeping power and DC voltage source series circuit is researched. This method uses the load frequency response can realize the online test load characteristics, load test result is good.
Determination of Retardation Factor of Perchloroethylene in Low Organic Carbon Aquifer
Authors: Ma Chang Wen , Xie Hong Yong , Sun Zhi Guo
Published: October 2014

The retardation factor (R) expression was deduced for amended double-mode sorption isotherm of perchloroethylene (PCE) in low organic carbon content (0.080~0.090%) aquifer. The retardation effect varied with the solute concentration, the higher the concentration was, the lower the retardation factor. The values of R were determined and compared with the estimation values based on octanol-water partition coefficient (Kow), solubility data of a particular compound and Linear Free-Energy Relationships (LFER). It indicated that there were obvious discrepancy of R among the determinations and estimations. Although how to determine the exact value of R is still questioned, it may be advisable and feasible to understand the retardation effect using batch sorption tests in studying the transport of pollutant in aquifer, especially in mathematical simulation study.
Analysis of Degradation by Aerobic Recharge for Concentrated Leachate
Authors: Zhang Jian , Xian Ping , Yang Long Hui , Zhan Long Hui , Bu Guang Hui
Published: October 2014

Concentrated leachate obtained from landfill leachate by membrane separation was treated using technique of aerobic recharge. Variation of effluent COD, NH3-N and pH in concentrated leachate during aerobic recharge was studied. The impact of hydraulic loading on the removal rate of COD and NH3-N was investigated. The results indicate that, after passing through the three stages of rapid declining, smooth declining and stabilization, the variation of effluent COD of the concentrated leachate versus time maintains in the range of 900~2000 mg/L, and the corresponding removal rate is 88%~92%. The variation of effluent NH3-N versus time indicates a trend that it climbs up initially and then declines. The effluent NH3-N starts from 700 mg/L. After 35 days, it declines down to 18 mg/L and maintains in the range of 93%~99% with a corresponding removal rate up to 98%. Aerobic recharge reduces the build up of organic acids in the early stage. After 10 days, the pH value of the leachate maintains in the range between 7.5 and 9.0. The COD removal rate decreases from 94.39% down to 75.75% when the hydraulic loading increases from 12.5 mL / (L·d) to 75mL / (L·d), indicating a strong trend. In the mean time, the NH3-N removal rate decreases from 98.14% down to 90.11%, indicating a weak tread.
Biodegradation of Major Pollutants in Yeast Wastewater by Using Immobilized Micro-Aerobic Microorganism Technology
Authors: Fu Jie , Wang Xiao Fei , Deng Chao Bing , Xian Ping
Published: October 2014

In order to provide an effective and economic method for the yeast wastewater′s treatment, this study taken yeast wastewater as objection, and applied immobilized micro-aerobic microorganism technology into yeast wastewater′s treatment, then explored the degradation effect of major pollutants in yeast wastewater. The immobilized carrier was analyzed by scanning electron microscope (SEM) and Fourier transform infrared spectrometer (FTIR), and dominant species in immobilized carrier were identified. The results showed that immobilized carrier was a composite carrier with porous structure, and removal rate of chemical oxygen demand (COD), ammonia nitrogen (NH3-N), total nitrogen (TN) and total organic carbon (TOC) of yeast wastewater by using the immobilized micro-aerobic microorganism technology were 71.1%, 99.7%, 61.4% and 67.0%, respectively. Moreover, the dominant bacteria which attached in the carrier included Sphingomonaspaucimobilis, Pseudomonas putida, Acinetobacterlwoffii and Pseudomonas stutzeri.
Bio-Treatment of APMP Effluent with Activated Sludge
Authors: Liu Ting Zhi , Wang Hao Yu , Li Shuai , Liu Yuan
Published: October 2014

Aerobic activated sludge was more appropriate for APMP(Alkaline Peroxide Mechanical Pulp) effluent treatment than anaerobic processes because the high content of toxic wood extractives in the effluent. In this article, Eucalyptus APMP effluent was treated with activated sludge and the process conditions was optimized. The optimized conditions were: the initial pH value was 6.0, SV30 of activated sludge was 35%, and loading volume of flask was 150ml (250ml flask), cultured shakily for 3 days at 35°Cand 150rpm. The removal of COD was 66.75%, from 4181mg/l to 1390mg/l, and the color of the effluent and treated water were 2541C.U. and 1557C.U. under the optimized conditions, respectively. In most cases, the color of treated wastewater was increased compared with the initial effluent, but the removal of COD was significant.
Research on the Impact Mechanic Property of the Silicon Carbide with Tungsten (SiC-W) Composite Material
Authors: Sun Hong Chan , Hu Bing , Zhang Huan , Zhang Li Na , Wang Xin Ge
Published: October 2014

This article does some research on SiC-W composite material. Getting the material with SPS, the micro-structure was observed. The micro-structure of SiC is mainly lamellar structure and the Tungsten did not infiltrate the SiC. Via mechanics performance test of SiC-W, we found although both SiC and SiC-W show the characters of brittle material, but the Tungsten mixing can improve the toughness in certain level.
Oxidative Degradation and Kinetics of Trichloroethylene by Thermally Activated Persulfate
Authors: Yue Jun Jie , Zhu Xiao Qiao , Wang Yu Ting , Zhang Yu Qin , Zhao Li , Shi Zhao Hong
Published: October 2014

In situ chemical oxidation with persulfate (PS) anion (S2O82-) is a viable technique for remediation of groundwater contaminants such as trichloroethylene (TCE). This laboratory study investigated the use of the oxidant sodium PS for the chemical oxidation of TCE at different conditions to determine the influence of temperature, pH, and the PS/TCE molar ratio. Experiments revealed that higher temperatures, lower pH, and higher PS/TCE molar ratios were to the benefit of TCE oxidation by PS. By investigating the reaction kinetics, the degradations of contaminant can be described by use of pseudo-first-order reaction. At the temperatures ranging from 25°C to 40°C, the activation energy for the degradation of TCE was determined to be 85.04 KJ/mol.
Study of Pretreatment of Textile Wastewater Using CaO2/H+/Fe2+ Advanced Fenton-Like Oxidation Technology
Authors: Lu Xiu Guo , Lin Pan , Jie Qi Wu
Published: October 2014

The study explores pretreatment of textile Wastewater by using CaO2/H+/Fe2+ advanced Fenton-like oxidation technology. The result show that when the initial COD is 2200mg/L, the pH=3, the reaction time is 40min, the speed is 150r/min, the dosage of calcium peroxide is 24g/L and the dosage of FeSO4 is 2g/L at 25°C, the removal rate of COD reach 81.82% and the decolorization rate is 99.93%. Compared to the pure CaO2 oxidation, COD removal rate increased significantly and its processing effect is greatly increased; whereas Compared to the advanced Fenton oxidation technology, this kind of Fenton-like system greatly reduces the cost, improve the effect of effluent, provide new way for calcium peroxide used in wastewater treatment.
The Law of the Residual COD in Distilled Spirit Wastewater after Two Stages of Biochemical Treatment
Authors: Li Ya Yun , Liu Xu Qing , Zhang Li , Yuan Hao , Liu Chao
Published: October 2014

Based on the tests of the high concentration organic wastewater from the sampling of Maotai flavor liquor enterprises in Chishui River Basin after two stages of biochemical treatment, this study found out the residue COD concentration range and investigated the rules of its formation. Under anaerobic conditions,the inert COD (SI) were measured.The experimental results showed that: the anaerobic retention time was 48 hours and the COD concentration of the effluent after aerobic biological treatment was about 300~350mg/L, the residual BOD5 accounted for 1~2%, the difficult to degrade in raw water COD accounted for 28~33% and SMP accounted for 65~73%. In conclusion, the research findings can provide a scientific justification for the depth treatment process of liquor wastewater to reach the standard.
Advances in Stress Factors of Aquatic Macrophytes in Polluted Water
Authors: Zhang Cui Ying , Wang Li Ping
Published: October 2014

Aquatic macrophytes are of significant importance for polluted water restoration.This paper reviews current research progress of stress factors for aquatic macrophytes growth and analyzes existing problems. Factors including nutritive salt, suspended sediments and deposited sediments had an obvious effect on aquatic macrophytes growth, and the impacts of light intensity, heavy metals, temperature and pH on the growth of aquatic macrophytes were little than that of the above factors. The problems existed in present researches were: dynamic and quantificational studies of the impacts of some stress factors on aquatic macrophytes growth were insufficient, there was lack of integrated investigations considering several factors which were of complex relationship.
Design and Analysis for Partition Plate of Gravity Oil-Water Separator
Authors: Liu Hong Jun , Jia Guang Zheng , Cai Yong Peng , Chen Shi Peng
Published: October 2014

The internal structure and the working principle of gravity oil-water separator used for self-circulation well-flushing equipment were given. Based on CFD, the flow field was calculated and analyzed with partition plate settings. The influences on separation efficiency were analyzed, according to velocity vector diagrams and oil drop trajectory diagrams. The results show that the location of the primary partition plate is installed more reasonable, the efficiency of separation is more advantage. Also, the structure and size of the primary partition plate and the size of the auxiliary partition plate can influence the efficiency of oil-water separation regularly.
Methanogenic Performance of Pulp and Paper Mill Sludge Using Anaerobic Digestion Process
Authors: Du Zhao Mei , Wu Qin , Zhang Xiao Qin
Published: October 2014

The feasibility of pulp and paper mill wastewater sludge as substrates for biogas production was evaluated in labrotory scale. Also the influence of pre-acidification, feeding modes and sludge concentration on anaerobic digestion system were studied.
CO2 Absorption/Release Properties of Lithium Silicate (Li2SiO3) Powders Prepared by the Sol-Gel Process
Authors: Wang Fei , Wakou Seino , Hirai Shinji , Kuzuya Toshihiro , Li Te
Published: October 2014

The sol-gel synthesized powder was a single phase Li2SiO3. This synthesized powder was reacted with CO2 at temperatures ranging from the ambient temperature to 511 K, and the products can reverted reversibly to Li2SiO3 above 511 K. The degree of absorption was defined as the value obtained by dividing the fractional mass gain of Li2SiO3 after absorption by the fractional mass gain corresponding to a 100% reaction. Consequently, the degrees of absorption of the sol-gel synthesized powders were determined to be 9.6%, 13.9%, 16.1% and 20.4% under the absorption condition at 313 K, 333 K, 353 K and 373 K for an exposure time of 115.2 ks, respectively. The specific surface area of synthesized powder was measured as 40 m2/g, higher than that of Li2SiO3 synthesized by solid state reaction of 30 m2/g. After CO2 absorption, the specific surface area of synthesized Li2SiO3 was increased with the increase of absorption degree because of the volume expansion. Compared with Li2SiO3 synthesized by solid state reaction, Li2SiO3 powder synthesized by sol-gel process possessed bigger specific surface areas and higher micro pore volumes. Through the measurement of FE-SEM and BET, the average diameter of micro pores was decreased after CO2 absorption, because of the generation of Li2CO3. The absorption behavior could be best explained by an intraparticle diffusion mechanism, that is, the diffusion of CO2 gas through the reaction product with an apparent activation energy of 28 kJ∙mol-1 was a rate-determining step of the absorption reaction.
Synthesis of Zeolite 13X from Coal Fly Ashes and Properties of the Zeolite Products
Authors: Tu Wei Wei , Zhang Yong Feng , Bai Jie , Liu Wei
Published: October 2014

Synthesis of pure-form zeolite 13X was investigated using the alkali fusion-hydrothermal method to dissolve Si and Al sources from fly ash, and with the addition of Si source, to prepare initial gel. Experimental results demonstrated, the regular morphology and homogeneous composition are in good agreement with standard zeolite 13X by characterization of XRD, SEM and IR. The properties of adsorption and CEC values were evaluated by BET and UV-spectrophotometry, respectively. All properties are much better than commercial zeolite 13X. Our results further revealed that like coal fly ash after alkali fusion pretreatment can be used for zeolite synthesis. Thus, It demonstrates a promising feedstock for the green synthesis of zeolites directly without experiencing intermediate chemicals.
Nucleophilic/Oxidizing Degradation of Paraoxon and Thioanisole Using NH3 Modified Aqueous H2O2 Solution
Authors: Zhao San Ping , Xi Hai Ling , Wang Qi , Zuo Yan Jun
Published: October 2014

Degradation of paraoxon and thioanisole (PhSMe) were studied using NH3 modified H2O2 solution as decontaminant. Degradation rates of paraoxon depend exponentially on pH of the modified solution. Nucleophilic substitution mediated by HOO- is the major degradation mechanism and at least two orders of magnitude faster than hydrolysis. Proton catalytic oxidation and solvent-aided oxidation contribute differently to the primary oxidation of PhSMe (PhSMe→PhS(O)Me), and the apparent kinetic constants (kap) of the primary oxidation show a three-stage profile with pH of the NH3-modified H2O2 solution. Secondary oxidation of PhSMe (PhS(O) Me→PhS(O)2Me) is much slower than the primary oxidation in the modified H2O2 solution, and the yield of PhS(O)2Me depended exponentially on pH too. The best pH range for the NH3 modified H2O2 solution as a broad-spectrum decontaminant is at 9.5-10.0 since a balance of nucleophilic/oxidizing decontamination reactivity could be achieved.