bluuebunny/crossref_metadata_2025 huggingface dataset:
Preliminary Study on Reaction Kinetics of Ammonia Nitrogen in Aqueous Samples Removed by Microbial Nano-Silica Ball
Authors: Yin Chao , Lu Jia , Shao Xiao Hou , Mao Xin Yu , Wang Long , Min Yong , Shu Mu Chen
Published: August 2014

EM enrichment culture liquid was immobilized on nano-silica carrier to form microbial nano ball, so as to investigate the reaction kinetics of ammonia nitrogen (NH4+-N) by microbial nano ball. The results showed that first order reaction kinetics model could describe NH4+-N removal by different diameter microbial nano-silica balls well. And the microbe could keep higher biological activity between 0-72h. Reaction kinetic equations of NH4+-N were: (1) when diameter was 10mm, (0-48h), (48-72h); (2) when diameter was 20mm, (0-48h), (48-72h); (3) (0-48h), (48-72h).
Research on the Effects of Modified HDPE for Wastewater Treatment
Authors: Ma Wei Fang , Guo Hao , Han Dong Mei
Published: August 2014

MBBR processes improve reliability, simplify operation and require less space than traditional wastewater treatment systems. The performance of biological membrane carriers is very important to MBBR operating efficiency. Modified HDPE material is more hydrophilic and electropositive. The experiment indicates that: The grafting percent is 3.67% at 40 min exposing time in Acetone-AA-BP system. The outflow CODCr and NH3-N removal efficiency is 87.57~93.12% and 68.82~76.33% respectively in modified HDPE system. The outflow CODCr and NH3-N concentration is content to II series in Discharge standard of water pollutants (DB 11/307-2005).
The Experimental Study of SO2 Removal by Atomized Ammonia Injection in the Tail Flue of a 300 MW CFB Boiler
Authors: Wei Ri Guang , Cheng Shao Wei , Gao Jian Qiang
Published: August 2014

An experimental study on the desulfurization system by atomized ammonia injection was conducted in the tail flue of a 300MW CFB boiler. The tests was going under the unit load ranges from 229.5MW to 267MW with ammonia concentration of 5.2~9% and flow at 3.7~9.0 t/h, the gas temperature at 145~149°C, the maximum final desulfurization efficiency is 55.6%, the average removal efficiency at 21% ~ 26%. The ammonia also has an activation function to the CaO in fly ash, which counts 15.7% to 29.8% of the total amount CaO in fly ash.
Application of Vetiveria zizanioides Assisted by Different Species of Earthworm in Chromium-Contaminated Soil Remediation
Authors: Zhang Ke , Chen Qiang , Luo Hong Bing , Li Xiao Ting
Published: August 2014

An earthworm-assisted phytoremediation of Cr contaminated soil was conducted to study the performance of different earthworm species in Cr accumulation of Vetiver Grass (vetiveria Zizanioides VG). Two species of earthworm (Eisenia Foelide and Pheretima guillemi Michaelsen) were added in trial. The result showed Vetiveria Zizanioides can absorb great amounts of chromium in soil. The decline rate of Cr was up to 87% and 78% respectively in the tiral of Eisenia Foelide (EF) and Pheretima guillemi Michaelsen(PGM) at 60th day. As the concentration of Cr gradually increased within 3.3-120mg/kg, the accumulation activity of two groups presented first increase and then decrease and reached maximum 976.7mg/kg and 943.1 mg/kg in root. It began to decrease when the Cr concentration was above 120mg/kg.Vetiveria Zizanioides's accumulation ability differs in root and shoot. It presented root>shoot. With a comparative analysis, PGM has higher accumulation and resistance to Cr at any designed treatments. In the analysis of relation between plants and soils, it was found that there was significant correlation in Cr contents between plants and soils (P<0.05). There was a high retention rate of Vetiveria Zizanioides root to Cr. Retention rate of any treatments adding earthworm were all greater than 87.91%. The biggest value was up to 96.23%. There was no obvious difference between EG and PGM in retention rate.
Assessment on Emergent Pollution Emergency of Water Environment of Qinghe River Basin Based on Fuzzy Integrated Evaluation Method
Authors: Ma Xing Guan , Liu Xue Ning
Published: August 2014

For making timely and correct decisions for emergent pollution emergency of the water environment, combined with fuzzy integrated evaluation method, the model for the evaluation of emergency is established. Qinghe river basin is estimated in 3-level fuzzy integrated evaluation from 6 aspects. The results show that the score of emergent pollution emergency of the water environment of Qinghe river assessment is 3.9273,which close to a good level. The capacity of emergency support and emergency response is superior, and the abilities of emergency prevention, emergency decision-making and emergency recovery are relatively general, which should be completed.Emergent pollution emergency of the water environment is affected by many factors, a multi-target integrated evaluation system should be established. At present, the emergent pollution emergency system of water environment in our country still needs to be improved, the construction of which started relatively late, and the evaluation of which is at the exploration stage. To find the existing problems and shortcomings in emergency system of emergent pollution in water environment, the emergency evaluation index system is established, which improve the water environmental pollution emergency system. However, most of the indicators building the index system are qualitative, which has certain fuzziness when being estimated. Meanwhile it exists certain fuzziness when expressing characterizing attributes of the degree of realization and level of most evaluation indicators, and it is difficult to use specific, accurate data for quantitative description, generally it is expressed by fuzzy degree concepts like ‘Excellent, good, medium, qualified, bad’ and so on. Therefore, the emergent pollution of water environment is estimated by fuzzy integrated evaluation method in this paper.
Effect of Organic Fertilizers Used in Washed Soil on the Growth of Tomatoes
Authors: Hou Yong Xia , Yang Jing , Hu Xiao Jun , Li Yu Shuang , Song Xue Ying , Yang Ji Song
Published: August 2014

Abstract. In order to reveal the regulating capacity of organic fertilizers on washed soil, pots experiments were carried out. The growth of tomatoes planted on washed soil amended by organic fertilizers were measured. Organic fertilizers can be helpful to improve the plant height, stem diameter, the aerial parts fresh weight, root fresh weight, leaf photosynthetic rates and photosynthesis, and lay a good foundation for the growth of tomatoes. The effect of organic fertilizers is the most significant. Among all the treatments of adding 2.5%, 5%, 10% organic fertilizers, adding 10% organic fertilizers is the best. It can significantly enhance the growth and photosynthesis of tomatoes, and is among the best of these three soil treatments for washed soil.
Process Optimization of Chemical Precipitation for High Concentration Phosphorus Containing Wastewater Treatment
Authors: Jia Zhong Yuan , Zhang Lei , Cheng Peng Gao , Tang Na
Published: August 2014

The marine oil and gas transmission pipelines should be washed by phosphoric acid solution before they were used. The washing wastewater, containing high level of phosphorus, was treated by calcium chloride. The response surface method (RSM) based on Box-Behnken was adopted to consider the impact of n (Ca):n (P), pH and reaction temperature on total phosphorus (TP) removal rate. In this work, the Design-Expert 8.0.6 was employed to design and analyze the results. Then, a quadratic polynomial model was built with TP removal rate as the response value. It was shown that the n (Ca):n (P) and pH have a significant effect on TP removal rate. The interaction of pH and temperature is significant. The optimum conditions were X1=3.40, X2=10.97, X3=38.12. In this condition, the predicted value of TP removal rate is 99.9242% while the average removal rate of verification is 99.9365%, which was shown that the predicted value was identical with experiment value.
Research of Compressibility of Purple Soil in the Three Gorges Reservoir
Authors: Guan Shi Feng , Xia Zhen Yao , Zhang Lin Lin , Chen Yi
Published: August 2014

Ecological restoration of soil slope has become an important content in the three gorges reservoir region. Based on the compression test of purple soil in the three gorges reservoir region, analyzed the index of compressibility, reflected the compactness of the different moisture content of purple soils, provided theoretical guidance for the ecological slope protection. Results of the trial indicated that the purple soils are the high-compressible-soil; the void ratio of purple soil reduces obviously with the increase of moisture content; with the increase of moisture content, the compression coefficient first increases and then decreases, and the compression index decreases gradually; but the compression modulus does not show a similar trend, it's minimum on the moisture content of 14%.
Simulation Study on Sewage Discharge Environmental Effect in Tianjin South Port
Authors: Yu Hang
Published: August 2014

The sewage diffusion is an environmental material for marine environmental protecting. It plays an important role in port engineering now. Its effect under deep water was carried out between different diffuser design parameters based on the hydraulic model test, and sewage marine disposal project in Tianjin south port was taken as an example. For this project, jet angle was controlled to be 0 degree, and horizontal angle was controlled to be 45 degree. It not only can ensure that sewage fully diluted mixed, also can avoid the premature convergence and sewage lifting. It is feasible for selecting large angle nozzle under deep water and there are some technical bases have been provided for other sewage marine disposal project.
Tourist Environmental Capacity of Futuan Estuary National Wetland Park
Authors: Kong Fan Long , Chen Yu , Li Yue , Yang Ling , Chen Ting
Published: August 2014

Tourist capacity and environmental capacity are significant considerations in the eco-tourism planning of wetland park for its sustainable development. Guaranteeing the quality of tourism resources and the conditions of ecological environment can obtain the best economic interest. This paper divided the study area into five areas according to the needs of the status quo and characteristics of planning and management. According to the actual situation of the wetland park, the land use index is estimated. And then the paper predicted the tourist environmental capacity of Futuan Estuary National Wetland Park based on the land usage index and square meter which will facilitate to take corresponding measures in the range of capacity and avoid overload of tourism environment.
Carbon Storage and Carbon Dioxide Sequestration of Banana Plants at Different Growth Stages
Authors: Zhao Mu Qiu , Li Ming , Shi Yun Feng
Published: August 2014

Large annual herbaceous plants such as banana (Musa spp.) have a very impressive carbon (C) storage and carbon dioxide (CO2) sequestration in agroecosystems, and play a certain role in global C cycle, climate regulation and reducing global warming. In this paper, we systematically studied C storage on the different growth stages, CO2sequestration and distribution, and mathematical models for predicting CO2sequestration by bananas which were planted in western Hainan island, China. The results showed that C content of dry matter in different structures of banana plants was 45-50% in line with the current results, and in fruit reached the highest, in stems and roots followed, while that in leaves were the lowest. C storage in different structures of banana plants increased exponentially during banana growing process (vegetative growth and bud stage), stems were the major storage structures of C, and roots and leaves also had considerable C storage. C fixed by banana plants was mainly distributed in fruit at fruit growing stage. CO2sequestration was 16.3, 41.1 and 80.0t/ha at vegetative growth, bud and fruit maturity stage separately, and power function model can be applied with stem diameter (D) or composite parameter (D2H) as independent variables to predict.
Catalytic Decomposition of N2O over M(10)/RPSA (M=Mg, Mn, Cu, Zn) Catalysts
Authors: Wang Ming Jin , Wang Hong , Li Cui Qing , Ding Fu Chen , Song Yong Ji , Cai Ka Sha
Published: August 2014

Nitrous oxide (N2O) is a kind of important greenhouse gas,which has the potential damage on the ozone layer and people’s physical health. A series of RPSA loading metals catalysts were prepared by impregnation. The catalysts were characterized by XRD, TG-MS, NH3-TPD, SEM method. The catalytic performance for N2O decomposition was evaluated. Cu-based catalyst is the best activity for N2O decomposition, T95is 540°C.
Optimization of Fermentation Medium and Culture Conditions of Hydrocarbon-Degrading Bacterium Brevibacillus panacihumi W25
Authors: Wang Xin Xin , Li Chen , Zhao Li Bin , Wu Liang , Zhou Ping , An Wei , Chen Yu
Published: August 2014

Members belonging to the genus Brevibacillus had potentials in the bioremediation of hydrocarbon-contaminated soils. However, little is known about the fermentation medium and culture conditions of Brevibacillus panacihumi. The effect of concentrations of glucose and (NH4)2SO4, initial pH value and culture temperature on the biomass of B. panacihumi W25 was measured with single factor experiments, which was a hydrocarbon-degrading bacterium. Polynomial regression analysis showed optimal concentration of glucose and (NH4)2SO4, initial pH value and culture temperature were 45.2 g/L, 0.6 g/L, pH 7.3 and 30.3°C, respectively. The optimization of fermentation of B. panacihumi was reported for the first time.
Parameter Optimization of Municipal Sludge Treated by Supercritical Water Oxidation Process
Authors: Gao Mei , Wang Shu Zhong , Ma Hong
Published: August 2014

Supercritical water oxidation process can effectively degrade the total nitrogen in municipal sludge. In order to obtain the optimum parameters of municipal sludge treated by supercritical water oxidation, this article selected the total nitrogen removal rate as the evaluation value, and used response surface methodology to optimize the parameters of sludge treatment by supercritical water oxidation, the parameters including temperature, pressure, residence time and oxidation coefficient. The results show that the reaction temperature, pressure and residence time exist interaction, and the influence degree of parameters is: pressure > reaction temperature > reaction retention time; The optimum reaction conditions are as follows: reaction temperature 539 °C, pressure 27 MPa, residence time 434 s, and oxidation coefficient 2.16, under these conditions, the total nitrogen decreasing efficiency can reach 74.12%.
The Research Progress of Agricultural Non-Point Source Pollution in the Black Soil Area of Northeast China
Authors: Shi Min , Xiao Wei Hua , Wang Chun Mei , He Da Wei , Hao Cai Lian , Dang Xiao Fei
Published: August 2014

A large area of agricultural non-point source pollution which was caused by higher input of fertilizer and pesticide, lower availability of fertilizer, soil erosion and serious destruction of ecological balance in black soil region of northeast China has attracted the national attention and raised the relevant scholars’concern. This paper mainly summarizes the research on mechanism exploration, quantitative of pollution load and model simulation and controlling measure of the black earth region of northeast conducted by domestic scholars, which based on the instruction of general situation of agricultural non-point source pollution in black soil region of northeast China, and then put forward the shortcomings in the present study and direction of future development.
Empirical Research on Ecological Carrying Capacity Evaluation of Agricultural Industrialization Leading Enterprises
Authors: Liu Yi Ling , Li Song Qing
Published: August 2014

According to the connotation of agricultural industrialization leading enterprises in the ecological carrying capacity and characteristics of the hierarchy, the elastic force from ecosystem, resources and environment carrying capacity and ecosystem stress three aspects carries on the quantitative research method is proposed. In quantitative research results for instance agricultural industrialization leading enterprises bearing capacity based on the analysis of the data fitting, the study of agricultural industrialization leading enterprises of the ecological carrying situation and development trend are discussed.
Degradation Microorganisms Filtration of Petroleum Hydrocarbon in Tropic Ocean
Authors: Su Zeng Jian , Li Min , Zhang Yu Xiu
Published: August 2014

Six oil degradation strains were obtained from the tropic ocean of Hainan province using diesel oil as the sole carbon source in the research, which aim is to prevent and restore the ocean oil pollution at present and in future. The degradation rate of diesel oil by these strains was tested and three stains were filtrated as the dominant bacteria from Soh7, Soh11, Soh23, Soh26, Soh38 and Soh53 which were Soh7, Soh11 and Soh53. The 15d DR were 40.6%,31.3%,37.1% and 25d DR were 51.2%, 40.3%, 47.8% (TDR were 63.1%, 54.9%, 60.6%) separately under 24°C. Based on the morphological, physiological and biochemical test results, the Soh7 was identified asSporolactobacillus sp.and Soh11 and Soh53 wereAcidothermus sp..
Equilibrium Analysis of Upstream and Downstream Enterprises in the Emissions Trading Based on the Model of Treatment Costs
Authors: Zhou Ying , Chen Yan Ping
Published: August 2014

This article saw upstream and downstream enterprises in the same watershed as two overalls.Firstly, created a mathematical programming model of pollution control costs and upstream and downstream enterprises’ emissions reductions.Harnessed the method which solved the feasible solutions of the vector optimization problems meeting Kuhn-Tucker conditions to calculate two companies’ marginal treatment costs and put them as the market price of emission rights trading.Then created two companies’ benefit functions and found their Nash equilibrium outputs and incomes.Next analyzed the impacts of the emission trading price on two companies’ equilibrium and calculated the specific range of price parameter.Finally, gets the conclusion that only a reasonable emission trading price can lead to rational resources allocation.
Experimental Study on Simultaneous Desulfurization and Denitrification by Ozone Oxidation Combined with Alkaline Wastewater Washing
Authors: Yin Hua , Guo Hua Fang
Published: August 2014

It is important to develop low cost and efficient technique for simultaneous removal of SO2and NOXfrom flue gas. In this paper, ozone oxidation and alkaline wastewater washing process was employed for flue gas desulfurization and denitrification in a 75t/h coal-fired boiler. In order to optimize the operation parameters for SO2and NOXremoval, the influence of several parameters, such as molar ratio of [O3]/[NO] and flue gas temperature on the oxidation rate of NO, oxidation rate of NO, alkaline water level in aeration tank, alkaline water rate and mole ratio of [NaOH/ (SO2+NOx)] on the removal efficiency of SO2and NOXhave been studied. The experimental results showed that molar ratio of [O3]/[NO] had limited effect on the oxidation of SO2, while NO oxidation efficiency improved with the increase of [O3/NO] molar ratio and it reached to ~ 90% at molar ratio of [O3]/[NO] = 1.4. Flue gas temperature performed slight influence on the oxidation of NO in the range of 60 to 120 °C, and had adverse impact on the removal of SO2and NOX. NOXremoval rate was enhanced with increasing NO oxidation rate and achieved to a high level at NO oxidization rate of ~50%. Mole ratio of [NaOH/ (SO2+NOx)] had significant impact on the removal rate of NOX, while it showed limited effects on that of SO2. The increase of alkaline aeration water level and alkaline water rate would definitely lead to a higher removal rate for both SO2and NOX. An optimized removal rate of 93.6% for SO2, 77.6% for NOXand 99.1% for dust were obtained under the water level of 20cm and volume of 74.5t/h.
Research and Prospect of Waste Mud Treatment Technology
Authors: Ma Juan , Qu Cheng Tun , Yang Bo , Li Shan
Published: August 2014

Mining process will produce a lot of waste mud, and since these indiscriminate matter will lead to the surrounding environment pollution, and human and animal health problem, safe disposal of waste mud is more and more important today. In this paper some common methods, such as direct emission, inject into safe strata, landfill disposal, seal in the pit, land farming, solid-liquid separation, solidification and microbiological method were mainly described, respectively. And a new method of waste mud treatment“fertilizer additives”is inducted and discussed in this paper also.
Research of Improving the Technique of Electrostatic Collection to High Resistivity Dust by Humidifying and Cooling through Ultrasonic Atomization
Authors: Guo Li Juan , Hao Wen Ge , Ren Xiao Zhen , Zhang Kuan
Published: August 2014

In order to study the effect of dust removal in the electrostatic precipitator under the influence of change of temperature and air moisture of flue gas, the ultrasonic atomization and electrical heating has been adopted for simulated gas to change its air moisture and temperature. The specific resistance of fly ash of fluidized bed boiler, the V-j characteristics of the precipitator model and the efficiency of dust removal has been tested in gas working conditions. The measured results of dust specific resistance shows that: when the temperature of gas at range of 100°C to 150°C, the specific resistance of dust was lower when the air moisture is at 23.73% than at 5.21%, especially when the gas temperature is below 120°C, the specific resistance of dust reduce more,and it can reach the orders of magnitude at1010Ω·cm when the moisture of 23.73%; then keep the temperature at 150°C and make the moisture increased, the specific resistance of dust is decreased, however it is still more than 1011Ω·cm when the moisture is increased to 23.73%. The measured results of V-j characteristics of the precipitator model shows that: when the moisture keeps at 23.73% and the temperature is below 120°C, the electric field does not occur the phenomenon of anti-corona. The test result of the efficiency of dust removal indicated that: when we make the moisture increased to 23.73% and the gas temperature below 120°C, the efficiency of dust removal shows a significant increase. The results confirmed that we can improve the purification efficiency of high resistivity dust through flue gas humidification and proper temperature maintain.
Study Case - Low Concentration Fluoride Wastewater from Photovoltaic Enterprises Recycled
Authors: Wang Yu Ling
Published: August 2014

A photovoltaic cell company located in China used with double pass reverse osmosis method to treat low concentration fluoride wastewater. Product water entered the pure water preparation system to recycle. The design capacity of wastewater was 180m3/h. The project improved the pretreatment methods, the operating conditions and the cleaning methods of membrane, so as to prevent membrane blocked and increase of service life. This project ran stability.The water treatment cost was about 4 yuan/t, lower than the local water price.
Study on Aerosol Particles Thermophoretic and Diffusiophoretic Deposition
Authors: Zhang Feng Zhen , Zhong Yue Sheng , Liu Xing Yong , Du Huai Ming , Yang Hu
Published: August 2014

A model of aerosol particles being removed from high temperature and humidity gas when passing across cooling walls is constructed, which takes thermophoretic deposition and diffusiophoretic deposition into consideration. The axial distribution of the temperature, humidity and aerosol concentration of the gas can be obtained from this model. The simulated prediction matches well with the experimental data from the literature[1]. The key factors which affect the aerosol particles deposition efficiency under different humidity conditions have also been revealed.
Study on the Effects of Wastewater Duress on Chlorophyll Content of 4 Species Wetland Plants
Authors: Lu Min , Liu Gong Sheng , Li Dong He , Kang Wen Feng , Zhao Jie , Li Ke Ke , Li Da , Zhao Xue Ming
Published: August 2014

The research which is the species selection of constructed wetland plants and the resistance of the plants is the key to ecological wastewater treatment technology. This paper studies the change of chlorophyll content in 4 wetland plants (Phragmites communis, Typha orientalis, Arundo donax and Canna generalis) in different wastewater duress time. The results show: chlorophyll contents in Canna generalis and Arundo donax have less change, and their anti-stress capability are stronger.
The Prevention and Control of Pollution from Airport Oil Depots
Authors: Ouyang Xiao Dong , Dong Shi Bao , Hu Li Ming
Published: August 2014

It analyses the major pollution sources from airport oil depot and the harm they will cause, then it discusses the countermeasures to prevent and control these pollutions from four aspects, i.e. the oil depot construction, the daily management, pollution prevention and controlling methods and perfecting related laws and regulations.
The Research of Absorption on U(VI) by Nanometer α-Fe2O3 Microsphere
Authors: Wei Qing Peng , Li Shi You , Xie Shui Bo , Liao Jian Biao , Li Yin
Published: August 2014

Adsorption of uranium(VI) ions by Sodium alginate (SA) immobilized nano-α-Fe2O3 particles beads were investigated in the batch experiments.The influences of the nano-ferric oxide content in beads，cross-linking time, solution pH, initial U(VI) concentration, temperature and contact time on U(VI) sorption were studied. The results indicated that the adsorption capacities are strongly affected by the solution pH, the best adsorption rate can be thought of to be at pH 3. The adsorption was rather fast in the initial 1.5 h, and the equilibrium was established in 9 h with the sorption capacity 2.64 mg/g. The kinetic adsorption data was simulated better by a pseudo-second-order equation. The removal rate increased slowly with temperature ascending . The adsorption process conformed to the Langmuir and Freundlich isothermal adsorption models, and the data fitted the latter better.
Analysis of Rhodamine B in Chinese Wolfberry from Market Sale by HPLC
Authors: Wang Ting Xin , Zhou Li Yan , Zhang Xiao Yu , Jiao Hai Xia
Published: August 2014

Based on the method of high performance liquid chromatography - diode array detector (HPLC - DAD) ,this experiment rapidly detected rhodamine B of Chinese wolfberry from market sale. Rhodamine B in the samples was dissolved by hexane.And after it was evaporated, it was extracted quantitatively.And then rhodamine B was measured with high performance liquid chromatography (HPLC) detector, using external standard method of peak area for quantitation. Results showed that the test conditions: 80 percent methanol and 20 percent water as mobile phase; sample volume was 20 μL ; column temperature was 35 degree centigrade; the flow rate was 1.0 ml per min and detection wavelength of 545nm, a reference to the wavelength of 600nm.Rhodamine B of the linear correlation coefficient was 0.9998 between the concentration of 0.06 and 0.20μg per ml. The stability of the method was in the range of 2.4 percent to 3.3 percent, precision was about 1.60 percent, recovery rate determination results were between 85.75 percent and 103.80 percent,The positive rate of rhodamine B was 80 percent. This method has the advantages of simple, rapid and accurate, and is very suitable for the determination of rhodamine B in Chinese wolfberry.
Synergetic Degradation of Enzyme-Fenton Reagent for Methyl Orange
Authors: Yao Bin , Xu Zun Mian , Tao Cheng An , Wang Jian Fang
Published: August 2014

The effects of pH adjustment method, pH value, UV light, catalase and Fenton reagent on the degradation efficiency of enzyme-Fenton reagent for methyl orange (MO) were investigated, and the synergetic catalytic effects of catalase and Fenton reagent on the catalytic oxidation for methyl orange were found. When under no UV-light, the enzyme can enhance the degradation efficiency of Fenton reagent. The optimum conditions for degrading methyl orange simulated wastewater whose concentration is 0.1 g/L at room temperature are obtained as follows: the pH is tuned with H2SO4, pH is 3.0, concentration of catalase is 5 μg / mL, concentration of H2O2is 0.01%, concentration of FeSO4is 1.8μmol / L. The degradation rate can reach 98% in 60min. When under UV light at the same condition, the degradation rate can reach 94% in only 15min.
Numerical Study the NOx Emission Characteristics of 600MW Opposed Swirling Coal-Fired Utility Boiler
Authors: Liu Ya Ming , Li Fang Yong , Xu Qi Sheng
Published: August 2014

In this paper, a computational fluid dynamics (CFD) model of a 600 MW opposed swirling coal-fired utility boiler has been established to numerically study the NOx emission characteristics under different ratios of over fire air (OFA) and modes of in-service burner layers. The current CFD model had adopted a chemical percolation devolatilization (CPD) model and been validated by comparing the simulated results with the experimental data. The numerical simulation results show that, with increasing the ratio of OFA, the carbon content in fly-ash increase somewhat linearly and the NOx emission reduce significantly, and the OFA ratio of 30% is optimal with higher burnout of pulverized coal and lower NOx emission. The different in-service burner layer modes have different influences on the residence time of the pulverized-coal particles, effect of air staging in the burner region and flue gas temperature at the exit of the lower furnace. Stopping the upper burner layers can increases the residence time of the pulverized-coal particles, resulting in the reduction of the carbon content in the fly ash and the increase of the pulverized-coal burnout. The flue gas temperature at the exit of the lower furnace can also decrease, which would be helpful to reducing the slagging tendency on the surfaces of the platen superheaters.
Simultaneous Desulfurization and Denitrification by Combined Ozone Oxidation and Alkaline Wastewater: A Case Study
Authors: Yin Hua , Guo Hua Fang , Xu Xue Qing , Qian Yuan Ge
Published: August 2014

In this paper, we mainly introduced demonstration project of flue gas desulfurization and denitrification achieved by ozone oxidation and alkali wastewater. The System showed high automatization, which performed good adaptability and load tracking capacity on the concentration of SO2, NOXand variation of flue gas. Meanwhile, outlet concentration of the SO2and NOXcould meet the design requirements. The experimental results showed that the overall economy of designed process had certain advantages compared with conventional desulfurization and denitrification technologies.
Study on the Collaborative Degradation of Acid Red B Dye Wastewater by O3/H2O2
Authors: Chen Hai Feng
Published: August 2014

Acid Red B dye wastewater was collaborative degradated by ozone and hydrogen peroxide. Various reaction conditions are studied which affect on decoloration rates of wastewater. The decoloration rate of Wastewater increases with O3 gas flow rate increasing, and also increases with pH value increasing. O3/H2O2 collaborative effects are better than O3 alone, and the decoloration rate is higher with more H2O2 addition. Ozone Oxidation have a good effect to degrade Acid Red B dye wastewater, the decoloration rate can reach 98% with inflating O3 30min. H2O2 synergy can greatly increase the reaction rate, shorten the reaction time, improve the utilization of ozone.
Study on the Copper Ion Removal from Water by Adsorption
Authors: Liu Li Bo , Zhang Li , Gong Wei Ming
Published: August 2014

The feasibility of using oyster shell powder for the removal of Cu2+ from aqueous solutions was investigated employing an adsorption technique. Oyster shell powder with different size was prepared. Its adsorption property to copper ions was studied. It was found that in an aqueous medium of pH 7.0, the adsorptive capacity of copper ions increased gradually with the increase of adsorption time, the addition amount of oyster shell powder and decrease of particle size. Compared with other treatment methods, this method has advantages of simple process, low cost, good treatment effect, it has a good application prospect.
A Study on Heavy Metals Pollution in Soil and Fruits of Rosa roxburghii Tratt from the Planting Bases Located in the Karst Areas of Guizhou Province
Authors: Wang Yi , Ding Xiao Yan , Yang Hao , Hu Ji Wei , Jiang Fan , Chen Hai Long
Published: August 2014

Both single pollution index and integrated pollution index methods were employed in the present research to assess the heavy metals pollution of soil in the threeRosa roxburghii TrattPlanting Bases (located in Qianxi County and Qixingguan region in Bijie, Longli County in Qiannan), the baseline values of heavy metals in soils in Guizhou Province, Environmental Quality Standard for Soils (GB15618-1995) and Conditions of Green Food-tech0.nical Environmental Quality for Production Area (NY/T391-2000 and GB/T18407.1-2001) were applied as references. National Food Safety Standard-Contaminants in foods was applied to evaluateRosa roxburghii Trattfruits. The results suggest that the studied soil samples conformed to Environmental Quality Second Level Standard for Soils and Green Food-technical Conditions. The overall quality of the soil conditions was uncontaminated, but point source pollution phenomenon existed. Hg, Pb and Cu pollution were the main factors contributing to the rise in comprehensive pollution index from the threeRosa roxburghii TrattPlanting bases. It was found that levels of As and Cu did not exceed the limited standard of the soil，while Hg, Cr, Cd and Pb exceeded the standard in different degrees in studiedRosa roxburghii Trattplanting bases. The rates of excessive quota of Hg, Cr, Cd and Pb in the studiedRosa roxburghii Trattfruits was 6.67%, 13.33%, 73.33% and 100%, respectively. The mean accumulation coefficient of Cd forRosa roxburghii Trattfruits was up to 1.20. The mean accumulation coefficients for concerned heavy metals were in the order of Cd > Cu > Pb > Hg > As> Cr. The relationships between concentrations of heavy metals in soil, leaf and stem samples were weak. However, significant correlations were found between concentrations of As in soil and leaf samples (r = 0.928), and concentrations of Cr between in soil samples and Cr in leaf samples (r = 0.733).
Sulfur Poisoning and Regeneration of SCR Catalyst Based on V2O5/TiO2
Authors: Zhao Ning , Li Li , Pan Si Wei , Tang Long Hua
Published: August 2014

The deactivation and regeneration of SCR catalyst have caught attention in the coal-fired power plant. Sulfur poisoning was one reason of the SCR catalyst deactivation. The V2O5/TiO2 catalyst was prepared by sol-gel method. The SO2 poisoning of V2O5/TiO2 catalyst was investigated. The catalytic activity by thermal regeneration and thermal reduction methods were compared. The results showed that thermal regeneration or thermal reduction could recover the catalytic activity effectively. The best effect was obtained with the thermal reduction by 5% NH3 concentration.
The Application of Information Retrieval in Governance Decision of Water Bloom Based on Decision Tree and CPN Neural Network
Authors: Wang Zhao Yang , Shi Yan , Wang Xiao Yi , Wang Li , Xu Ji Ping , Bai Yu Ting
Published: August 2014

This paper is based on the study of typical strategy of water bloom governance in China and introduces information retrieval method in water bloom governance. It can both ensure accuracy of the search and improve the search speed to combine decision tree and CPN neural network as retrieval mechanism. Finally it can be proved that the information retrieval mechanism is effective in governance decision of water bloom after using the Beihai in Beijing as the example.
A Classification Method of Projection Pursuit Based on Population Migration Algorithm for Fly Ash
Authors: Xu Lin , Fang Chong
Published: August 2014

In order to solve the problems of one-sidedness of current researches in classification of fly ash, degree of fineness, vitreous body, ignition loss, K2O, SO3 and CaO are chosen as the index properties to analyze projection pursuit classification method after analyzing chemical constituents and physical properties that influence the quality of fly ash. Targeting on the activity characteristics, the thesis establishes a projection pursuit cluster analysis model and makes a program on the basis of MATLAB. Population migration algorithm is adopted to seek an optimal projection direction. Fly ash is classified in accordance with property index value of the projection. Researches have proved that the model overcomes the shortcomings of traditional classification methods and reflects the quality and performance of fly ash in a comprehensive way. The evaluation is simple with accurate results and provides a scientific basis for the comprehensive utilization of fly ash.
Effect of Different Mass Ratios of Straws and Vegetable Wastes on Co-Composting
Authors: Cui Xin , Yang Yong Chao
Published: August 2014

The effects of different raw material ratios on straws and vegetable wastes co-composting were investigated in pilot scale. The evolution of physical property (temperature, pH value, electrical conductivity (EC)) and nutrient substance (total carbon content (TC), total phosphorus content (TP), total nitrogen content (TN), C/N ratio) of composting were measured in order to research effects of different raw material ratios on the quality and maturity of composting products. Results showed that The temperature of P3 can reach above 50oC for 5 days and the time of high temperature for P3 was longer than P1 (2 d) and P2 (4 d). Compared with P1 (8.23 ms/cm) and P2 (7.63 ms/cm), the final EC value of P3 was 7.33 ms/cm which was lowest of the three piles and P3 had the lowest resistance on plants. At the end of the composting process, TC of P1, P2 and P3 have decreased about 30%, while the content of TN and TP has not changed significantly. The initial C/N ratio of P3 was 23.33, and the final C/N ratio was 12.08. Results indicated that the mass ratios of straw and vegetable waste on 7:3 was the most effective to compost and the compost quality and maturity of P3 was best among the three piles.
Effects of Transition Metals and Rare Earths on Iron-Carbon Micro Electrolysis Degrading Dyeing Effluent
Authors: Kuang Ju Chi , Chen Xiao Gang , Chen Min Hua
Published: August 2014

The principle and methodology of effluent treatment by iron-carbon micro electrolysis were introduced in the paper. Then design of the orthogonal experiments for dyeing effluent treatment was formulated. Discussion of influences of related factors on effluent treatment followed. Results were got after the detailed analysis. Therefore, we deduced the mechanism that the cations of Transition Metal (TM) and rare earth (RE) assist of zero-valent irons catalyzing degradation of dyeing effluent. The mechanism is formed based on the following explanation. Cations of manganese and cobalt easily penetrate Fe0lattices, while Ce4+cations do it difficultly because of their larger radius. Thus Ce4+is weaker than both of Mn2+and Co2+for helping zero-valent irons to improve their activity. Furthermore, because the valence electron structure of Mn2+is more stable than that of Co2+, Mn2+is better for assisting zero-valent iron catalysis of degradation of dyeing effluent than Co2+. Therefore, ranking of influence for zero-valent iron catalysis activity from greatest to smallest is Mn2+, Co2+and Ce4+.
Present Situation and Necessity of Kitchen Waste Disposal in our Country
Authors: Yang Dong , Zhang Meng , Zhang Xiao Jie
Published: August 2014

Along with the speeding up of urbanization and the improvement of people's quality of life, city garbage as a core part of the city sanitation engineering in recent years, more and more get the attention of the government. In our country, kitchen waste as part of the city garbage, the manufacturing quantity more and more. Science of processing the rubbish can not only protect the environment and people's health, but also for resources to use again. Through the survey of domestic processing of kitchen waste, put forward the domestic city for reasonable deal with the necessity of kitchen waste.
Characteristics of Gaseous Produced from Co-Pyrolysis of Municipal Solid Waste and Corn Stalk
Authors: Jia Jin Wei , Lu Ming Yuan , Yuan Yue Fu , Liu Lu , Yang Feng Sheng , Fu Xing Min , Xu Guo Huan , Zhao Huan , Meng Shuai , Shu Xin Qian
Published: August 2014

An experimental study on co-pyrolysis of municipal solid waste and corn stalk was performed in a fixed-bed reactor under atmospheric pressure. The effect of different blending ratio on the pyrolysis product yields and compositions of the gaseous products was investigated. The results indicated that there exist synergetic effects in the co-pyrolysis of municipal solid waste and corn stalk. Under the different blending ratio conditions, the char and liquid yields were lower than the theoretical values calculated on pyrolysis of each individual municipal solid waste and corn stalk, and consequently the gas yields were higher. H2 and CH4 obtained co-pyrolysis at 800°C-900°C of 40% blending ratio conditions were higher than those of municipal solid waste and corn stalk alone.
Co-Pyrolysis of Polyethylene Plastic and Cellulose as Models for Medical Waste in Supercritical Water
Authors: Gong Yan Meng , Wang Shu Zhong , Tang Xing Ying
Published: August 2014

Co-pyrolysis of polyethylene plastic and cellulose as models for medical waste had been studied on a supercritical water batch reactor. The results show that temperature, reaction time, pressure and the mass ratio of water to organic matter have some degree impact on the conversion rate, oil yield and gasification efficiency. Conversion and gasification efficiency reached the maximum values at 440 °C. The content of H2 in the gaseous products rose significantly between 25 MPa~27 MPa. As reaction time increased, conversion and gasification efficiency increased, but oil yield decreased. The composition of gaseous products was affected greatly by the mass ratio of water to organic matter. Adding K2CO3 and Ca (OH)2 as catalyst, the reaction was promoted obviously.
Effects of Arsenic on Enzyme Activity in Mine Soil Microorganism
Authors: Zheng Jing Hua
Published: August 2014

To understand the effects of arsenic on enzyme activity of soil microorganisms in mining area, 18 soil samples were taken from Xinqiu open-pit mining area. The mechanism of soil microorganisms in response the change of arsenic concentration was studied by a pot experiment. The effects of arsenic on the activity of invertase, urease and catalase in soil microorganisms were characterized by enzyme activity experiment. The results showed that the microbial biomass in soil decreased with continuous elevated arsenic concentration. However, no significant effect was observed on the composition of microflora with the change of arsenic concentration. In soil microbial community, the predominant microorganism was bacteria (about 80%), then followed by actinomycetes and fungi. Most importantly, high concentration of arsenic obviously inhibited the activities of enzymes in soil especially for invertase and urease. The results obtained in this study provide additional insights into the microbial metabolic mechanisms under different concentration of arsenic in soil microbial community.
Fe3O4 Magnetic Preparation by Bauxite Ore Washing Fine Mud
Authors: Xiao Jian Qiang , He Guo Wei , Hu Yan Jin
Published: August 2014

Bauxite waste sludge as a raw material, the use of reverse chemical coprecipitation synthesize Fe3O4. Researching temperature, precipitation concentration, aging time and Fe2+/Fe3+ molar ratio effect on the particle size, morphology. Optimal experimental conditions: temperature 70 °C, the precipitant NaOH mass ratio of 10%, aging time 3h, Fe2+/Fe3+ molar ratio of 2:3. Test methods using a laser particle size analyzer, XRD analysis of the products were characterized, the product is Fe3O4, the average particle size of 0.11mm.
Research on Flue Gas Emission Control Technology of Vehicular Pyrolysis Treatment Equipment for Medical Waste
Authors: Han Jun Shu , Wu Li Hua , Wang Zheng
Published: August 2014

This Thesis introduces the principle and structure of vehicular pyrolysis treatment furnace for medical waste and analyzes two flue gas purification structures of direct purification and coil purification and the effects, existing problems and forming reasons of flue gas emission of aftertreatment underwater aeration quenching structure; purification structure and quenching structure designed based on 3T control theory can control flue gas emission quality effectively and greatly reduce the influence on the environment due to the secondary synthesis of Dioxin and these structures have met national safety and emission standards; flue gas emission technology is a key technology for miniaturization and light-weight trend of pyrolysis treatment equipment for medical waste and a significant technological base for development of pyrolysis treatment car for medical waste.
Study on the Feasibility of Recycling Condensate Water of Lignite by Microwave Dehydration Treatment
Authors: Tang Hui Ru , Huang Zhen Yu , Shen Ming Ke , Wang Zhi Hua , Zhou Jun Hu , Cen Ke Fa
Published: August 2014

As a low-rank coal, the high moisture content of lignite need to be dehydrated and refined before combustion. To alleviate the water shortage situation of lignite region, this paper put forward a way of microwave dehydration to recycling the water out of lignite. By detecting the chemical oxygen demand, ammonia nitrogen, total phosphorus, hardness, ions, organic compounds of lignite, it can be concluded that the dehydration ratio of lignite reaches 70~80%, and the water quality as ammonia nitrogen, total phosphorus was close to industrial standard. While the chemical oxygen demand exceeded the standard scope as well as trace amount of poisonous metal elements and organic compounds causing cancer, this will become the main task of subsequent purification process.
Suggestions of China Participating in Global Recyclable Resources Circulation
Authors: Zhang Mo , Chen Jing
Published: August 2014

Development of recyclable resources industry makes a positive effect to alleviate the shortage of resources and control environmental pollution. At present, China's recyclable resources industry still has some problems. The Government should vigorously develop recyclable resources industry and participate in global recyclable resources circulation in the future.
A re-evaluation of tenses in isiZulu
Authors: Groenewald Hermanus C.
Published: August 2014

The methodology of this article involved an examination of theoretical and empirical data so as to ascertain what the defining grammatical and semantic nature of tenses in isiZulu are with the ultimate goal of presenting an alternative view of these tenses. The article examined selected studies on the theory of tense in general as well as work done specifically on tenses in isiZulu. The most prolific scholar in South Africa writing on tenses in isiZulu is L.C. Posthumus. His studies, particularly those of 1990 and 2008, were examined so as to highlight problems with regard to suppositions and terminology. The conclusion of this discussion was that the basis on which a distinction is made between the so-called absolute and so-called relative tenses in isiZulu is contentious. Examples of tensed clauses in all the tenses in isiZulu taken from the empirical data were then examined in order to gain a sense of the defining temporal information communicated by these clauses. Having discussed these examples alternative terms for some tenses were suggested. The empirical data that guided the discussion and provided examples of tensed clauses are drawn from selected narrative texts. The findings with regard to terminology and the temporal information of tenses in isiZulu were then summarised.