bluuebunny/crossref_metadata_2025 huggingface dataset:
Experimental Study of the Waste Gas of COIL Removing Iodine
Authors: Zhou Jun Bo , Dong Peng Yu , Guo Shu Fen
Published: June 2012

Chemical oxygen-iodine laser (COIL) has wide application prospects in the fields of national defense and industry, but at the same time COIL discharges out a large of corrosive gas, especially the iodine crystal of the waste gas endangers the equipment and environment gravely. Firstly the quantitative test on utilizing the iodine adsorption vessel to remove the methyl iodine by the soaked coal-based active carbon was did , then the qualitative test of the coal-based active carbon for removing stable iodine on the base of the first test was carried on. The result of the test indicates that the decontamination factors of the coal-based active carbon for removing the stable iodine is more than 1000, so it can satisfy the need of project application, and it is very important to deal with the waste gas of COIL and other nuclear facilities.
Research on Processing Method of Water Pollution Accident
Authors: Xiao Chun Ling , Jia Yun Zhong
Published: June 2012

Crops are the main victims of the accident of water pollution. The paper will discuss treatment program,investigation, crop damage symptom recognition, direct economic loss estimation of water pollution, confirmation, accident responsibility partition and arbitration of such links. It will provide principles for the other accidents. Besides, it can also be used as a handling reference to other issues of pollution and pollution accident.
Study on the Characteristics of Heavy Metal Accumulation in Seven Dominant Plants in Shilu Iron Mines Area of Hainan
Authors: Yan Hui , Luo Sheng Xu , Yao Qing Bin , Wang Ya Juan , He Yang Yang , Xiao Yu Jie
Published: June 2012

Based on the field investigation and sampling, seven dominant wild plants and relative soil samples in Hainan Shilu iron mines area were collected. To analyze and study the contents of heavy metals Pb, Cd, Cu, Fe, Mn and Zn in these samples and the characteristics of enriching heavy metals of these dominant plants. Results of this study showed that the contents of the same heavy metal in the soils around roots system of seven dominant plants had a large range of variation, to a certain extent, it reflected the difference of the enriched characteristics of different plants to the same heavy metal. All seven dominant plants had endurance and enriched characteristics to Fe. Bothriochloa root hoarded up abundant Fe, Cu, Zn and its stored characteristics to Mn, Pb, Cd also stood out from the seven dominant plants, so it could be used as good plant which absorbed a large amount of heavy metals but mainly held in the roots, this result had a good consistance with the finding that the enriched and transferred characteristics of Bothriochloa to heavy metals in soil. In the soil of low cadmium pollution, Calopo and Bothriochloa had higher concentration factors of cadmium, this indicated they had a good potential in high cadmium pollution soil. White tephrosia and Cyperus alternifolius had the higher metastasis ability to Mn, Zn, Cd, which had the potential of phytoremediation.
Nutrients Removal from Secondary Effluent by Using Different Constructed Wetland Systems
Authors: Xiang Xue Min , Zhou Xiao Bai , Wang Xiao Kun , Zhou Ji Ti , Wang Ren
Published: June 2012

Constructed wetland was recognized as an economic and ecological-friendly technique to reduce excess nitrogen (N) and phosphorus (P) in secondary effluent from sewage treatment plants. In this study, the removal capacity of non-planted control treatment, one stage constructed wetland with different feeding strategies, and multi-stage constructed wetland on chemical oxygen demand (COD), total nitrogen (TN), ammonia nitrogen (NH4+-N) and total phosphorus (TP)were evaluated. The results showed that all the planted treatments displayed superior removal efficiency for COD and nutrients in compare with the non-planted control treatment. The feeding strategy could influence COD andN removal rate that the averageremoval rate of the COD, TN, and NH4+-N in intermittent feeding treatment (61.3%, 52.6% and 88.7%) was much higher than continuous feeding treatment (46.8%, 20.6% and 73.9%). Higher TN and TP removal rate was observed in multi-stage constructed wetland (74.1% and 98.1%) than the single-stage constructed wetland (20.6% and 96.9%). This implied that intermittent feeding strategy and the multi-stage constructed wetland may have a good potential for removing nutrients from secondary effluent.
Research on the Method of Odor Pollution Classification
Authors: Qiu Jian Hui , Bao Jing Ling
Published: June 2012

In recent years, the numbers of odor pollution sources and odor pollution events are increasing rapidly, along with the high growth of life quality and the growing of people's environmental awareness. Odor pollution has been one of the hottest and most difficult problems that the environmental management department is facing. Evaluating and classifying the odor pollution is important basis for analyzing the odor pollution. This article has discussed the classification of odor pollution preliminary.
Immobilized Methods and Application of Immobilized Saccharomyces cerevisiae Cells
Authors: Zhu Ying , Zhou Jian Ping , Wang Zhi Ye
Published: June 2012

The study was to find low costs and superior performance immobilized carrier for microorganism cells using in industry. Ca-alginate , Agar , Gelatin-glutaraldehyde and polyvinyl alcohol (PVA) were investigated to immobilize Saccharomyces cerevisiae cells, and immobilized cells’ production capacity for ethanol, contents of ethanol and mechanical strength were also studied. Then, optical microscope picture and scanning electronic microscope pictures were given to research its microenvironment. Finally, Batch and Continuous fermentation with PVA immbiolized Saccharomyces cerevisiae were experimented. The PVA immobilized method is the best in the four methods with concentration of 8%, microscopic observation also offered a proof that PVA material was fit for immobilizing cells with the traits of polycellular and reticulate. At last, the production capacity for ethanol and reactivity were superior to free cells in batch and continuous fermentation. This research could provide important information on the commercial utilization immobilized-cells for biotransformation.
Study on Purification of Black-Odors River Water by Floating-Bed-Grown Lythrum Salicaria with Root Regulation
Authors: Tong Min , Li Zhen , Huang Min Sheng , Chen Jian Jun , Cao Cheng Jin , He Yan
Published: June 2012

The potential of Lythrum salicaria with root regulation to improve black-odors water quality in Wenzhou city was evaluated using a constructed ecological floating bed system. The roots of plants were regulated by three varieties of regulating materials which had same dimension but different pore sizes. The results showed that root regulation by materials with pores on the surface could enhance the growth of plants and create a favorable rhizosphere providing a large root surface-area for biofilm development. The material of smallest pore size had the best regulating effect. The floating beds planted with Lythrum salicaria at a static state all had a promising removal potential. Compared with plants without root regulation, the regulated plants achieved higher biomass yield, removal efficiencies and uptake of N and P. The results indicated that root regulation could promote the growth of plants and elevated the nutrient removal.
A Compact and Efficient Technology to Treat Tailings Water Characterized by High Alkalinity and Ca(II) and Pb(II) Concentration
Authors: Liu Si Qing , Tong Xiong , Song Bao Xu
Published: June 2012

The tailings water of Luoba lead-zinc concentrator in Gansu China is characterized by high pH value and calcium oxide content, moreover, the concentration of lead ions, biochemical and chemical oxygen demand （BOD and COD） exceed the regulatory discharge standard. Studies on the combined use of ammonium bicarbonate (NH4HCO3) and LSQ (an innovative regent developed by Kunming University of Science and Technology) were conducted to treat the wastewater. Results show that the quality of treated tailings water by calcium removal-neutralization process can meet the regulatory discharge standard. Results show that the treated water can be reused for flotation, which helps to upgrade the quality of the concentrate and makes no difference with the fresh water used in the concentrator.
Isolation and Identification of a PCBs-Degrading Strain
Authors: Zhao Zhe , Zhuo Sheng Guang , Zhou Xiu Yan , Zhang Lan Ying
Published: June 2012

A salt-tolerant PCBs degrading strain B2.6 which can use PCBs as the sole carbon source and energy was isolated from the deep sea sediments of southern Yellow Sea. It was identified as Vibrio splendidus, according to morphological, physiological and biochemical characteristics and 16SrDNA sequence analysis. The experimental results suggested that the optimum conditions for the degradation of PCBs are temperature 30°C, pH 7 to 8, the concentration of NaCl was 150g•L-1. Under the optimum conditions, the PCBs degradation could reach 98.27% in 72h which concentration was below 0.6mg•L-1. The genome was amplified with bacterium 16SrDNA primer. The amplified product was purified and sequenced forphylogenetic analyses with Genbank. The bacterium B2.6 was identified as Vibrio splendidus. RAPD analyses of B2.6 produced stable DNA fingerprint. These studies have provided parameter for the further dynamic resolution of bacterium clusters for the rehabilitation of PCBs contaminated underground water environment with B2.6 PRB method.
Absorption Performance of Activated Carbon with Orange Peel through Phosphoric Acid Activation Method
Authors: Zhou Yue , Pan Wei Guo , Guo Rui Tang , Zhang Xiao Bo , Wen Xue Ping , He Ming Fu
Published: June 2012

In order to reduce power plant nitric oxide emission with gaining economical adsorbent, activated carbon was prepared from the raw materials of orange peel under different operating conditions in this paper. The methylene blue adsorption value of different activated carbon has also been tested, and the effects on the methylene blue adsorption performance of different dipping concentration, activation time and carbonization temperature were studied. The finding is that the dipping concentration has the most important impact on methylene blue adsorption value. The highest methylene blue adsorption value of orange peel activated carbon has shown as 277.746mg/g under the following conditions: phosphoric acid concentration was 40%, activation time was 12 hours and carbonization temperature was 500°C. It is a economically feasible absorbent material through a great deal of experiments and analysis.
Adsorption of Alizarin Red from Aqueous Solution Using Ultra-Fine Fly Ash
Authors: Li Bei Gang , Zhao Li Yuan
Published: June 2012

Alizarin Red (AR) has been shown to be effectively removed from aqueous solution using the ultrafine fly ash (UFA) prepared by ball milling from raw fly ash (FA), a low-cost industrial solid waste. The maximum removal rate was 91.04% in a solution of initial AR concentration of 700 mg/L, adsorption time of 60 min at pH 5.0 and temperature of 25°C. Compared with FA, the adsorption capacity of UFA is higher for AR removal. Effects of important parameters, contact time, adsorbate concentration, pH and temperature, were investigated. The UFA and AR-loaded UFA were characterized by FT-IR. The equilibrium, kinetics and thermodynamics of AR adsorption onto UFA were evaluated. The AR uptake process followed the pseudo-second-order rate equation well, but the pseudo-first-order rate equation and intra-particle diffusion equation could only be applied to describe the initial stage of adsorption, furthermore, intra-particle diffusion might be the rate-controlling step of fast adsorption process. The sorption decreased with increasing temperature and the adsorption apparent activation energy was 8.28kJ/mol. Langmuir isotherm equation could better describe the adsorption equilibrium at different temperatures, compared with Freundlich model. Thermodynamic parameters, ΔG, ΔH and ΔS, were also calculated. The results inferred that the adsorption of AR/UFA system was feasible, spontaneous and exothermic nature of the process which was mainly controlled by physical adsorption.
Advances of External Carbon Source in Denitrification
Authors: Liu Guang Ying , Zhang Huan Zhen , Li Wei , Zhang Xin
Published: June 2012

Carbon source used as electron donors is critical to heterotrophic denitrification. Addition of external carbon source is necessary when internal organics are deficient. A review was conducted on the use of external carbon source in denitrification. Traditional carbon sources such as methanol and ethanol, alternative carbon sources such as cellulose-rich materials, biodegradable polymers and primary sludge are included in external carbon sources. Present situation and problems of its biodegradability and effects in denitrification are summarized. Focus in external carbon source includes further study on the biodegradation mechanism of the media, slow release performance and nitrate removal rate of available carbon source and continuous research on new kinds of substrates. Recommendations on further study of carbon source are put forward.
Analysis of Persistent Organic Pollutants in Sediments of the Wanzhou Section of the Yangtze River
Authors: Qi Jun Sheng , Wang Yu Ling , Fu Chuan , Xie Kun
Published: June 2012

Organochlorine pesticides and polychlorinated biphenyls content can be obtained By measuring Wanzhou of the Yangtze River and Wanzhou Zhuxi River in sediment : Sediment content of organochlorine pesticides and polychlorinated biphenyls are increased the river down. Organochlorine pesticides in sediments are β-HCH> δ-HCH> α-HCH> γ-HCH, and pp'-DDE> pp '-DDD> op'-DDT> pp'-DDT. Organochlorine pesticides and PCBs of Wanzhou of the Yangtze River sediment in the distribution of the sampling points are similar characteristics. The main source of pollution is the direct discharge of industrial wastewater, agricultural pollution and soil erosion of farmland. Although OCPs and PCBs in water environment are very low, the impact on human health can not be ignored. Therefore certain measures are taken to clean emissions from industrial wastewater and agricultural non-point source pollution control.
Application of Circulator Clarifier + Gravity Valve-Less Filtrate in the Disposal of Coal Mine Wastewater
Authors: Zhao Qun Ying , Wang Yu Shu , Fan Xiao Li
Published: June 2012

The characteristic of coal mine wastewater was introduced. Engineering design and practical run of circulator clarifier +gravity valve-less were summed up for treating wastewater of coal mine. Practice indicated that the process was steady and reliable, the effluent satisfied water quality Ⅲ standard of Surface Water Environmental Quality Standard (GB3838-2002),and there was remarkable economic results during the process of sewage treatment.
Control Status and Strategy of VOCs from Gasoline Filling Stations in China
Authors: Li Ying Jie , Qian Hua , Jing Shen Gao , Dai Hai Xia
Published: June 2012

Tightness, dynamic back pressure and air to liquid volume ratio (A/L) of vapor recovery system of gasoline filling stations were detected, VOCs was analyzed by GC, in-station diagnostic operation status was inspected by site investigation. The results denoted that the modification of gasoline filling stations was not complete and the installed vapor recovery systems didn’t operate under normal state. Insufficient understanding on vapor recovery control, poor management and unsuitable regulations resulted in these problems. Some solutions such as enhancing the propaganda, making preferential policies, holding training for the connected staffs, maintenance in time, and revising the unsuitable regulations were proposed. This study has positive significance in promoting vapor recovery control developed in China.
Degradation of Reactive Brilliant Blue KN-R by Zero-Valent Iron/Activated Carbon Combined with Ultrasound
Authors: Bai Lin , Dong Xiao Li , Zhang Xiu Fang , Zhang Xin Xin , Ma Hong Chao , Ma Chun , Xue Mang
Published: June 2012

The treatment of Reactive Brilliant Blue KN-R in wastewater was conducted by using the zero-valent iron/activated carbon (Fe0/AC) combined with ultrasound (US). Although ultrasound alone had a little effect on the KN-R degradation and Fe0/AC had some disadvantages when it acted on the KN-R, the efficiency of the degradation was dramatically enhanced which used the combination of Fe0/AC /U.S. that also could eliminate the shortcomings. The decolorization percentage was nearly up to 100% and the COD removal rate has approached to 87.38%.
Detection and Treatment Technology for Automobile Exhaust Pollution
Authors: Yang An Jie , Bi Jian Ping
Published: June 2012

This paper describes the automobile production, sales and ownership in china during the past two years, then analyses the composition of vehicle exhaust emissions which are harmful gases to human body. Due to the urgency of the control of pollution from motor vehicles in china, emissions detection and treatment technology need to be further developed. Specially, this article puts forward some suggestions and solutions strengthening the maintenance of in-use vehicles and accelerating the pace of pollution control.
Hydroquinone Wastewater Treatment by Means of Electrochemical Oxidation in Three-Dimensional Bipolar Cell
Authors: Hu Jun Sheng , Dong Jia Li , Wang Ying , Guan Lei , Duan Ying Yong
Published: June 2012

By the static experiment, we studied the electrochemical oxidation process of simulated hydroquinone wastewater (concentration for 300mg•L-1) in the three-dimensional cell. Experimental inspected how various factors of the packing quality ratio, electrolysis voltage, supporting electrolyte concentration, and the initial pH value influence the effect of the removal of hydroquinone and CODCr. The results of the experiment clearly indicated with the increase of voltage applied the removal rate of hydroquinone and CODCr increased first and then decreased, finally and increased again. In the weak alkali conditions (pH=8.5), the removal rate of hydroquinone and CODCr is the highest, Electrolyte concentration and packing quality ratio to the effect of hydroquinone by electrochemical degradation is the larger. The results of the single factor analysis show that the most suitable processing conditions of simulated hydroquinone wastewater by bipolar electrocatalysis oxidation are the Na2SO4 concentration of 0.03mol•L-1, the electrolytic voltage of 6V, the initial pH value of 8.5, the packing quality ratio of 1:2. With this condition processing 3h, the removal rate of hydroquinone and CODCr reached 83.96% and 39.9%, respectively.
Kinetic Characteristic of Single Biological Aerated Filter (BAF) for Organics Degradation
Authors: Zhang Lian Ke
Published: June 2012

The kinetic model of organic removal in single biological aerated filter for domestic waste water treatment was established, and kinetic parameter was calibrated under certain hydraulic loadings. The results showed that organic removal efficiency was affected by the concentration of the influent COD, hydraulic loadings and the height of filter media when the reactor size was unchangeable. It is found that the model was accurate in predicting the effluent quality by the experiment and it could afford new reference evident to optimize the treatment processes.
Oxidative Removal of Elemental Mercury in Flue Gas by DBD Discharge Plasma
Authors: Jiang Yu Ze , An Jiu Tao , Shang Ke Feng , Lu Na , Li Jie , Wu Yan
Published: June 2012

Oxidation of gas phase elemental mercury (Hg0) in the simulated flue gas by DBD plasma under atmospheric pressure and ambient temperature (298 K) was conducted. Experimental results indicated that the oxidative efficiency of Hg0 increased with O2 content, the residence time of flue gas in reactor and the applied voltage. The oxidation efficiency of Hg0 reached over 96% under the applied voltage of 11 kV and the residence time of 0.24 s when the O2 content in flue gas was 20%, and the corresponding energy efficiency was at about 14.1 μg kJ-1. It was noted that the oxidation efficiency of Hg0 could still reach 80% when the O2 content in flue gas was only 4% (near the actual O2 content in flue gas of coal-fired boilers). The experimental results indicated that DBD plasma was one of the efficient technologies for purification of Hg0 vapor industrial flue gas.
Removal of Elemental Mercury by Gas Phase Surface Discharge Plasma
Authors: Jiang Yu Ze , An Jiu Tao , Lu Na , Li Jie , Wu Yan
Published: June 2012

The removal of elemental mercury (Hg0) with the reactive species produced by gas phase surface discharge plasma was studied. The effects of several operational parameters, such as applied voltage, inlet Hg0 concentration and gas humidity, were investigated. The removal of Hg0 was significantly promoted by an increase in the applied voltage of the reactor system. Hg0 oxidation efficiency decreases with increasing inlet Hg0 concentration. Furthermore, with the addition of H2O, Hg0 oxidation is remarkably restrained.
Accumulation and Distribution of Cadmium in Different Rice Cultivars
Authors: Liu Jian Guo , Huang Yi Cheng , Wang Ming Xin
Published: June 2012

Cadmium (Cd) accumulation and distribution in rice plants were investigated with six rice cultivars under different soil Cd levels. The results showed that Cd accumulations in different organs were in the order: root » stem > leaf > grain. The magnitudes of the differences among rice organs in Cd accumulations were larger for soil Cd treatments than for the control. The magnitudes of the variations among rice cultivars in Cd accumulations were the largest in grains, followed by roots, and the smallest in stems and leaves, and these were also larger for soil Cd treatments than for the control. Cd absorbed by rice plants were mostly accumulated in roots (about 80% for the control and more than 90% for soil Cd treatments), and only a very small portion was transferred into grains (about 2% for the control and less than 1% for soil Cd treatments). The magnitudes of the variations among rice cultivars in Cd distributions were larger for soil Cd treatments than for the control.
Research on the Furnace Fume Treatment and Control System
Authors: Yang Xiao Ping , Chen Yan Ru
Published: June 2012

Silicon metal is known as a metalloid or semi-metal with several characteristics of metals. Silicon metal also has a large influence on the modern world economy. But the production of the silicon metal consumes high energy and discharges huge furnace fume. According to the technical demands of the fume cleaning and micro-silicon powder recovery system to the silicon metal furnace, this paper studies the control scheme with the structure mode of Schneider PLC and the Kingview software, develops the relevant control program and monitor program, and optimizes the control strategy through the on-line debugging. The practical application indicates that the control system is stable and reliable with the best effect of dust extraction and the longest service life to the dust settling bag.
Simulated Study on the Migration of Petroleum Hydrocarbons in the Soil
Authors: Li Yu Shuang , Hu Xiao Jun , Yang Ji Song , Song Xue Ying , Hou Yong Xia , Chen Hong Liang
Published: June 2012

Spills and leaks of petroleum hydrocarbons such as gasoline, diesel, motor oils, and similar materials have caused widespread contamination in the environment. The migration and distribution of petroleum hydrocarbons in the vertical and horizontal profiles of soil were studied by the stimulating experiment. Results showed that the soil pollutions could diffuse in vertical and horizontal directions after petroleum hydrocarbons leaks. The petroleum hydrocarbons mainly spread vertically in the soil and the horizontally migration was relatively slowly. The migration distances were increased with a logarithmic growth dependence on the time both in horizontal and in vertical direction.
Spatial Distribution and Evaluation of Cadmium in Agricultural Soils Based on GIS: A Case Study of Chaoyang City in China
Authors: Jia Wen Juan , Yan Ying , Su Ying , Liu Ming Da
Published: June 2012

To identify the concentration and spatial distribution of cadmium (Cd) in agricultural soils, 207 soil samples were collected from Chaoyang and analyzed based on pollution index methods and GIS. The concentration of Cd in the soils of Chaoyang ranged from 0.030 to 0.687 mg/kg, with an average concentration of 0.246 mg/kg. The evaluated results of Cd in agricultural soils of Chaoyang shows that the pollution excess rate is 2.90%, the total agricultural soil environment of Cd was still clean, but some areas were accumulated by Cd. The differences between two evaluated methods indicate that evaluated criteria had a direct impact on the evaluation results, compared to integrated pollution index, the Geoaccumulation index method was more accurate and objective.
Study on Chemical Wastewater Treatment with Many-Point-Water-Inflow Biological Reaction Tank
Authors: Li Fang , Hao Dan
Published: June 2012

The composition of mixed chemical wastewater is more complex and biodegradability of its is bad, biochemical treatment effect should be further improved. Many-point-water-inflow bioreactor used in this experiment, through controlling hydraulic retention time(HRT), concentration of active sludge of the aeration tank, trace element content and so on, gets a better treatment effect. When water temperature is 25°C, HRT is 5h, 10h, 15h, 20h, 25h,COD removal rate is 60.37%, 82.62%, 89.44% , 91.02%,91.07%. According to the iron content of influent, plus 0.5mg/L ferrous sulfate into influent, the removal rate of COD is increased , activated sludge floc of the sedimentation tank is denser and settling. By changing the activated sludge return ratio to change the activated sludge concentration of the bioreactor, experiments shows that the removal rate of organic matter is better with the activated sludge concentration about 4000-5000mg/L. Influent qualities indicate that this biological treatment has good effect on mixed chemical wastewater.
Adsorption of Cr(VI) onto the Cross-Linked Cationic Starch and the Establishment of the Adsorption Isotherm and Kinetic Equation
Authors: Xu Yuan Dong , Yan Xiang Yang
Published: June 2012

Glycidyl trimethyl ammonium chloride (GTA) has been synthesized and used as cross-linked cationic reagent to prepare modified starch. The adsorption behavior of Cr(VI) onto the cross-linked cationic starch was studied systematically. The adsorption time and the temperature took great effects on the adsorption performance of the adsorbent. After a suitable time the adsorption could reach an equilibrium state and the adsorption capacity increased with the decrease of the temperature. The adsorption isotherm and the kinetic equation were established and they fit well with the Freundlich and Lagergren models, respectively. The used adsorbent was regenerated with acid medium and the recycling of the regenerated adsorbent has also been investigated.
Study on Treatment Efficiency of Livestock Waste Water with Biogas Slurry by Subsurface Constructed Wetland
Authors: Yang Xu , Li Wen Zhe , Wang Xiao Wei
Published: June 2012

The main objective of this study is to investigate the feasibility of treatment of livestock waste water with biogas slurry by the constructed wetland and provide the operation parameters for a full scale constructed wetland to improve the quality of waste water. The results showed that when the influent flux was 1.5m3/d, the average removal rates of Turbidity, COD, TN, NH4+-N and TP in the horizontal subsurface flow constructed wetland system were 89.57%, 59.21%, 55.09% 55.57% and 53.80% respectively. The wetland system has high treatment effect and run stably in the pretreatment process of livestock waste water with biogas slurry.
The Influences of Pollutants Distribution for the Ecological Water Transfer Based on the Spatial Differentiation in Baiyangdian Lake
Authors: Wei Quan Wei , Li Hong Bo , Liu Ling Jun , Wang Jing Fei , Wu Yi Hong , Zhao Qi
Published: June 2012

Baiyangdian lake is typical macrophytic lake, located in North China. With the economic and social development, as well as the impact of global climate change, the water pollution problem has been being a serious impact on the salubrious development of regional ecosystems. The local government has adopted a change of water storage basin to approach to fundamentally solve the problems of water pollution with the ecological water transfer in lake basins. In this paper, collecting the typical water pollutants data before and after ecological water transfer, using of ArcGIS software we have researched the diffusion mode and the enrichment regulation of the water pollutants from the perspective of spatial distribution caused by the ecological water transfer. The results show that there has a strong detention of the pollutants spread in Baiyangdian lake. With the ecological water transfer, there is a positive significance onto the local water deterioration, but not a fundamental solution onto the whole lake environmental issues. It still needs to develop the integrated control-rehabilitation managements and technologies for water pollutants combined with special land-water broken terrain and the local climate in Baiyangdian lake.
The Research of the Performance of Active Carbon Loaded Nano-Sized TiO2 in Formaldehyde Decontamination in Fluidized Bed Reactor
Authors: Liu Ya Qing , Deng Chao Bing , Xian Ping , He Jun He , Li Xiao Ping , Xu Ying Bo , Tang Ming
Published: June 2012

TiO2/active carbon (AC) photo catalysts are prepared by sol-gel method. We have designed a fluidized bed reactor to decontaminate the formaldehyde. In our experiment, active carbon and TiO2/AC are used as the air purification materials in the reactor. Flat aluminum sheets and electric field are introduced into the reactor. Our result shows that TiO2/AC materials have high removal rate, and it can reach 80%. When we add flat sheets and stable electric field, the removal rate reach over 90%.
The Study on Waste Kitchen Water Treatment by Artificial Wetlands with Different Plant Configurations
Authors: Zhan Jian Yi , Zuo Wei Wei
Published: June 2012

The paper is aimed at studying the purification effects of COD, TN, TP and SS to waste kitchen water by using three different wetlands constituted by a single oenanthe javanica, single acorus calanmus, oenanthe javanica+acorus calanmus mixed configuration under the same load and the same hydraulic conditions. The results showed that oenanthe javanica is effectual for removing COD and TN, acorus calanmus is effectual for removing TP. As for the way of configuration, single configuration is preferred for removing COD, mixed configuration is preferred for removing TN and TP, the effect of the three configurations for removing SS is generally of the same level.
Treatment of Stainless Steel Pickling Wastewater by Ion Resin Exchange and Activated Carbon Adsorption
Authors: Li Xiao Ming , Li Wen Feng , Wang Shang Jie , Cui Ya Ru , Zhao Jun Xue , Zeng Yuan , Li Fei
Published: June 2012

The static adsorption of stainless steel pickling wastewater by ion resin exchange and activated carbon adsorption was studied respectively. The results shown that, the static saturate adsorption capacity of 001×7 dry resin for Cr3+and Fe3+ in the wastewater was 60.34mg/g and 65.3mg/g respectively, and the elution rate of saturated resin by using Na2SO4 and H2SO4 can reach 99%. The saturate adsorption capacity of activated carbon for Cr3+and Fe3+ in the wastewater was 4.55 mg/g and 40.76 mg/g respectively, and NaOH as desorption reagent had a good desorption effect to activated carbon. The regeneration of activated carbon was also carried out.
A Pilot Study on the Volume Ratio of Anaerobic / Anoxic / Aerobic in A2/O Process Influence on Nitrogen and Phosphorus Removal
Authors: Wan Qiong , Feng Qian , Peng Dang Cong , Jing Shi Ping
Published: June 2012

The volume ratio of anaerobic/anoxic/aerobic was an important factor for the removal of nitrogen and phosphorus in the A2/O process. A pilot plant of A2/O process was built in Xi’an to do the research about the influence on nitrogen and phosphorus removal when the volume ratio of anaerobic/anoxic/aerobic was changed. When the HRT was 10.1h and the volume rate of anaerobic/anoxic/aerobic was 1/1.7/2.4, the removal rate of COD didn’t raise substantially than that of normal volume ratio A2/O process, the removal rate average value of TN and phosphorus were 61.5% and 85.4% respectively. On this condition, the HRT in aerobic zone shorted to 4.7h, energy was saved about 33.8% in comparing with that of conventional volume ratio A2/O process.
An Experimental Study on the Treatment of Corn Processing Wastewater by Membrane Bioreactor
Authors: Pan Jian Peng , Huang Min Sheng , He Yan
Published: June 2012

The treatment of corn processing wastewater by membrane bioreactor was studied in this paper. The results showed that CODCr and NH3-N were eliminated efficiently by single-stage aeration MBR. The average concentrations of CODCr and NH3-N in the effluent were 53.1 and 1.29 mg/L, and the removal efficiency were 92.9% and 93.0Subscript text% respectively. But the removal efficiencies of TN and TP were limited, as 46.7% of TN and 41.6% of TP were removed. The subsequent processes (coagulation,reverse osmosis,etc.) may be needed to achieve the goal of water reuse.
Compound WO3/TiO2 Nanorods Photocatalytic Degradation of Dimethyl Phthalate in Visible Light Region
Authors: Wang Chang Qing , Pan Su Juan , Zuo Guo Fang , Lei Xin You
Published: June 2012

The compound WO3/TiO2 nanostructures were prepared by the template technique and characterized by FE-SEM and UV-vis DRS. And they were used to degrade the dimethyl phthalate (DMP) under visible light irradiation. The effects of the initial concentration of DMP and dissolved oxygen (DO) were investigated. The results show that degradation rates reaches 59% in the optimum condition which is ​​the catalyst dosage ~3cm2, the DO is 19.2 mg/ L, xenon lamp irradiating 300 minutes and the initial concentration of dimethyl phthalate in aqueous solution is 10 mg / L.
Accurate Localization of the Mobile Genomic Islands in Pseudomonas putida
Authors: Song Lei , Zhang Xue Hong
Published: June 2012

Pseudomonas putida is a safety gammaproteobacterium that plays an important role in bioremediation. Twenty nine mobile genomic islands were accurately localized in four strains of P. putida, six in P. putida F1, six in P. putida GB-1, nine in P. putida KT2440, and eight in P. putida W619, respectively. The integration sites include the tRNA gene, such as tRNAMet gene, tRNASer gene, tRNALeu gene, tRNAGly gene, tRNAThr gene, tRNACys gene, tRNAPro gene, and some structural genes, such as arsenate reductase gene, DNA mismatch repair protein MutS gene, thymidylate synthase gene, and 6-pyruvoyl tetrahydropterin synthase gene. 6-pyruvoyl tetrahydropterin synthase gene was firstly determined as the integration site of the genomic islands. The action sites of the lambda integrases are the stem-loop sequence, and the action sites of the P4 integrase are the asymmetric sequence. KT2440GI-5 can produce R2-type pyocin particle that is a bacteriocin and can kill sensitive bacterium. KT2440GI-9 can code ectoine-induced proteins that cause the cells to survive in high salt concentration.
Constructed Wetlands Sewage Treatment Technology Purification Mechanism and Influence Factors
Authors: Bao Zhen Bo , Jin Deng Chao , Teng Hong Jun
Published: June 2012

Constructed wetlands are new sewage treatment technology, which have advantages of good decontamination effect, low operating costs and easy maintenance. Base on analysis of constructed wetlands composition and purification mechanism, the constructed wetlands purification influence factors are summarized, and the problems and solutions of constructed wetlands are pointed out. Carrying out in-depth study on constructed wetlands design, operational control and maintenance management to improve comprehensive benefits of wetland sewage purification technology, have great practical significance and far-reaching social significance.
Experimental Study on the Treatment of Low Concentration Domestic Sewage in a Zeolite Biological Aerated Filter
Authors: Cui Yan Ping
Published: June 2012

The present paper describes the performance and the feasibility of the zeolite biological aerated filter applied to treat the low concentration sewage as recalaimed water reuse as cooling tower make-up water in the thermal power plant. The result showed that average removal rate of COD, turbidity and ammonia was 79%, 86% and 50% respectively, under the conditions of hydraulic loading L=4.4m3/m2•h, gas-water ratio=2:1, HRT=0.63h, t=8.5~14.5oC and backwashing in 48 hours. The average concentration of COD, turbidity and ammonia in effluent was 13.0mg/l, 4.2NTU and 1.95mg/l, respectively. The effluent quality met the water quality standards of the reuse of urban recycling water-water quality standard for industrial uses GB/T19923-2005.
Pollutants Removal and Analysis of Microbial Community of Malodorous River in BFG-IVCWs
Authors: Zhang Yi Fan , Zhang Yong , Huang Min Sheng , Xu Huan , He Yan
Published: June 2012

The changes of concentrations of pH, DO, CODCr, NH4+-N and NO3--N in Biofilm Grid-Integrated Vertical-flow Constructed Wetlands（BFG-IVCWs）by treating the urban malodorous river were measured. After 45 days, DO had its own distribution and changing regulation, the removal rate of CODCr reach to 45%, at meantime, the removal rate of NO3--N are over 50%. The diversity of microbial community and its succession were analyzed by PCR-DGGE fingerprint. The result shows: the removal rate of CODCr and NH4+-N along the river flow gradually rises, and the removal rate of NO3--N rises at last. The removal of pollutants mainly happened in the down-flow system of the BFG-IVCWs. The differences of characters of biofilm and environmental condition of different positions made the microbial community structure diversity variable. Three kinds of biofilms (W3, W5 and W7) were analyzed with Shannon-Wiener and Cs indices and the value in position W3 was the highest.
Analysis and Improvement of Low Removal Efficiency of COD in Coking Wastewater Treatment
Authors: Ba Ya Er , Li Zi Fu , Tian Ying , Zhang Yang
Published: June 2012

Conventional treatment of coke plant wastewater includes pre-treatment, biological treatment and coagulation sedimentation. Due to the presence of refractory and inhibitory compounds, the conventional biological treatment is not efficient in removing COD to meet the effluent standard. The improving methods of the removal efficiencies were discussed.
Analysis of Information Flow Control in Waste Military Air Material Reverse Logistics Management
Authors: Wang Ke , Jiang Da Li , Liu Jun , Zhang Li
Published: June 2012

This paper analyses the characteristics of information flow in waste military air materials reverse logistics, the influencing factors and the structure of waste military air materials reverse logistics management. Then, the method of information flow management and control in waste military air materials reverse logistics is designed, and the architecture of information flow control in waste military air materials reverse logistics management information system is proposed.
Degrading Dynamics of Brilliant Blue in Soils and River Sediment
Authors: Hou Yong Xia , Hu Xiao Jun , Li Hui Ying , Li Xin Xin , Wang Yan
Published: June 2012

Abstract. The research objects were the soils along the river and river sediment of the fourth Liuhe river in Nanjing chemical industrial park. Degrading dynamics of brilliant blue in soils and river sediment and its affecting factors were studied through soil sterilization, the control of temperature and initial concentration of brilliant blue. The degradation rate of brilliant blue in non-sterilized soils and river sediment was respectively 1.010-1.023 times and 1.019-1.051 times of that in sterilized soils and river sediment in 45 d. The degradation quality of brilliant blue in soils and river sediment by microorganism was 0.010-0.029 and 0.021-0.057 mg•kg-1. The half-live in non-sterilized treatment was shorter than that in sterilized treatment. In the range of (10±1)°C-(30±1) °C, the degradation of brilliant blue was accelerated with temperature enhancing. At (30±1)°C, the residual quantity of brilliant blue in soils and river sediment was 0.612 and 0.601 mg•kg-1, the residual quantity and the half-live were both smallest.
Distribution of Organic Matter in Sediment of Lakeside Belt in East Dongting Lake
Authors: Lu Dian Qing , Wang Hong , Hou Xu Lei , Liu Xiao Mei
Published: June 2012

Distribution of organic matter and effect of wetland types and pH on organic matter were studied in sediment of lakeside belt in east Dongting Lake according to taking 56 samples from surface to 20cm and 52 samples from 20cm to 40cm. The results showed that the average content of organic matter was 15.40g/kg from surface to 20cm and 12.02g/kg from 20cm to 40cm in sediment of lakeside belt in east Dongting Lake. Spatial distribution of organic matter could be expressed as middle variation. Wetland types were classed into silt beach, lake marsh beach and reed beach in Dongting Lake region and influenced distribution of organic matter because of difference variance on hydraulic dynamics condition and retarding effect of vegetation on water flow velocity. Order of organic matter content in sediment was the lake marsh beach > reed beach > silt beach in 0-20cm and 20-40cm layers in lakeside belt in east Dongting Lake. Organic matter contents decreased in turn from 0-20cm to 20-40cm in lake marsh and reed beaches and increased in silt beaches. Values of pH in sediment were slightly alkaline in whole studied region. Negative correlation was established between organic matter content and pH value. The results will provide base data and science reference for controlling and recovery of sediment pollution in east Dongting Lake.
Study on Electrolyte for Coal Washing in Coal Slurry Sedimentation
Authors: Wang Hui Feng , Xu Zhi Qiang , Pei Da Niu
Published: June 2012

Introduced the current situation of coal slurry difficult sedimentation because of clay easily expansion and hydration to form colloidal suspensions. Experiments of suppressing montmorillonite using several different electrolyte solution was done. The results show that KCl solution can inhibit expansion and hydration of montmorillonite and improve its sedimentation effect significantly and reduce the amount of flocculant greatly. After raw coal sedimentation comparative test, the results show that washing coal by KCl solution can indeed promote coal slurry sedimentation effectively, and the dosage of flocculant is only about 2.5% that of water washed coal.
Pyrolysis of Aluminum Plastic Package Waste Based on Tube-Furnace Experiment
Authors: Zhao Zhen , Liu Feng , Zhang Qiang , Wang Lei
Published: June 2012

The pyrolysis and combustion characteristics of a aluminum-plastic composite package were studied by thermal analysis and on a tube-furnace. The experiments were performed in N2 atmosphere, 10% oxygen concentration and air atmosphere respectively. XRD analysis was further performed to identified the residue substance and its mineral phase. The results show the optimum pyrolysis temperature of a aluminum-plastic composite package is in the range of 600-700°C. The weight loss of APCP materials were in the range of 88.32-89.15% under a constant temperature of 600 °C and 650 °C for 1 h. The residue substance of APCP pyrolysis products were major Al and small amount of Al2O3 and AlN.
Release of Soluble Salts and Heavy Metals during the Short-Time Washing Process of MSWI Fly Ash
Authors: Wang Lei , Li Run Dong , Li Yan Long , Wei Li Hong
Published: June 2012

The three-step of MSWI fly ash washing process, to remove chloride from fly ash as much as possible, were investigated. The results show that with the increase of L/S, the release of chloride and sulphate both increased at the first step, but the effect of second and third washing step decreased for chloride, while the effect for sulphate increased. The suitable washing condition happened with a L/S ratio of 5 and 2 minutes of washing, considering the two economic factors (water consumption and economical factor).
Utilization of Waste Hydraulic Oil as Fuel in Diesel Engine
Authors: Wira Jazair Yahya , Wee Choon Tan , Syahrullail Samion , Hirofumi Noge , Said Mazlan , Mohd Nor Alias
Published: June 2012

Production of alternative diesel fuel has been increasing drastically in many Asian countries. Since the reduction of petroleum production by Organization of Petroleum Exporting Countries (OPEC), the research on alternative fuel for diesel engine has gain interest. The target of this project is to substitute some percentage usage of conventional diesel fuel with waste substance without compromising on engine performance and exhaust emissions. This study has produced two type of alternative fuels. A test fuel consisting 30% of water into diesel fuel with the existence of additive or emulsifier (span 80) is called as DW Emul. Another test fuel which is named as DHW Emul produced by blending 30% of water into a mixture consisting of 20% of waste hydraulic oil and 80% of diesel fuel with the existence of span 80. The engine performance and exhaust emissions of DW Emul and DHW Emul are measured and has been compared with the conventional diesel fuel. A 600cc single cylinder direct injection diesel engine was used. The experiment was conducted at 1500 rpm with variable engine loads. Results show that DHW Emul and DW Emul has higher brake specific fuel consumption (BSFC). However, by considering the total use of diesel fuel contained in DW Emul, the quantity was lower at all loads. The same goes for DHW Emul at low load but deteriorate at high load which show slightly higher compared with of using 100% conventional diesel fuel. DHW Emul has suppressed CO emission that is usually high of using emulsion fuel to the level similar to conventional diesel fuel. NOx and Smoke emissions for DHW Emul are lower than conventional diesel. The use of DHW Emul can give significant reduction of NOx and Smoke emissions without deterioration of CO emission.
Benefits from Waste Pickers and Collectors’ Doing Based on Land Resource and Environment for Beijing
Authors: Zhou Yan Fang
Published: June 2012

This paper is a case of studying the potential benefits for the city of Beijing in China, such as land resources, environment, disposal cost of municipal solid waste (MSW) and so on and assessing and presenting the results of assessing their contributions on resources, environment and economy for Beijing city in 2007.
Co-Pyrolysis Kinetics of Expandable Polystyrene Foam Plastics and Biomass
Authors: Li Bao Xia , Jin Pen , Cao Shou Kun
Published: June 2012

Based on the thermogravimetric analysis, co-pyrolysis of expandable polystyrene foam plastics (EPS) and three kinds of biomass (bagasse, peanut shell, corncob) were investigated. The result shows that synergistic effects of the co-pyrolysis of EPS/bagasse and EPS/corncob are obvious, but there is no remarkable synergistic effect for the EPS and peanut shell blends. The kinetic analysis indicates that the pyrolysis processes can be described as first order reactions model, a pretty good fitting of experimental data was obtained for all samples. In the EPS and the biomass pyrolysis, respectively， the former can be described as the one first-order reaction model, and the latter can be described as the three consecutive models, while the co-pyrolysis of EPS and biomass needs to be described as the four consecutive models.