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International Conference on Bioinformatics and Biomedical Engineering (ICBBE)

作者： Jing Cheng Chaojie Zhang Qi Zhou School of Civil Engineering and Architecture Wuhan University of Technology Wuhan China State Key Laboratory of Pollution Control and Resources Reuse Tongji University Shanghai China Key Laboratory of Polluted Environment Remediation and Ecological Health Ministry of Education Zhejiang University Hangzhou China

The anoxic degradation and removal of nitrogenous heterocyclic compound-dimethlypyridine, and the effect of pH, C/N ratio, bio-ferric on degradation of dimethylpyridine were studied by flask-shaking tests. The results indicate that dimethylpyridine was removed through three steps. They are biosorption-desorption-biodegradation. The optimal range of pH was 7~8. The C/N ratio was not affecting the reduction of dimethylpyridine greatly. Bio-ferric process cannot increase the degradation of dimethylpyridine; Dimethylpyridine could use as the sole carbon and nitrogen sources for biodegradation.

关键词： Sludge treatment Organic compounds Wastewater treatment pollution Thermal degradation Laboratories Biodegradation Chemical analysis Inductors Educational institutions

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Removal of Microcystins by Ultrafiltration Membrane without Pre-treatment

Removal of Microcystins by Ultrafiltration Membrane without ...

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The 3rd International Conference on Bioinformatics and Biomedical Engineering(iCBBE 2009)(第三届生物信息与生物医学工程国际会议)

作者： Wei-ying Li Ling Chen Yong Zhao Liang-jie Xie State Key laboratory of Pollution Control & Resource Reuse Tongji University1239 Siping Road Shangh College of Environmental Science and Engineering Tongji University 1239 Siping Road ShanghaiChina Key Laboratory of Yangtze Aquatic Environment Ministry of Education College of Environmental Science

The removal efficiency and mechanisms of microcystins (MC-RR & MC-LR) from deionized water by ultrafiltration membrane(UF) were studied in the dead-end mode. The results showed that polyvinylchloride UF filtration alone could not efficiently and consistently remove microcystins, the rejection decreased over time from 26％(MC-RR) 、 42％(MC-LR) to 2％、10％, respectively. The influence of relevant operating parameters such as flux, initial feed concentration was evaluated, which indicated that higher flux could improve the removal efficiency for both microcystins. The PVC UF should be combined with other conventional water treatment technologies such as activated carbon adsorption and coagulation and so on to remove microcystins in water. The dominant removal mechanisms of microcystins by PVC UF membrane may be hydrogen bonding adsorption and electrostatic attraction.

关键词： Polyvinylchloride ultrafiltration membrane(PVC UF) Water treatment Microcystins Adsorption

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Nitrogen Removal Mechanism of Fresh Leachate Treatment Using Sequencing Aged Refuse Bioreactors

Nitrogen Removal Mechanism of Fresh Leachate Treatment Using...

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International Conference on environmental Science and Information Application Technology, ESIAT

作者： Yingjie Sun Xiaojie Sun Huixia Wang Youcai Zhao Institute of Environment and Municipal Engineering Qingdao Technological University Qingdao China Department of Environmental Science and Engineering Tsinghua University Beijing China The State Key Laboratory of Pollution Control and Resource Reuse University of Tongji Shanghai China

In this study, the aged refuse excavated from a 10-year old closed landfill compartment at Shanghai Laogang Refuse Landfill was used as the substrate in a sequencing aged refuse bioreactor process for treatment of fresh landfill leachate which sampled from the balance tank in the same landfill. Typically, screened aged refuse with a diameter less than 8 mm was used as bio-filtration material in the two round shaped bioreactor with an inner diameter of 40 cm and a height of 130 cm. Influent fresh leachate with initial COD Cr , TN and NH 3 -N concentrations of 11000~15000, 1340~1770 and 11200~1650 mg/L, respectively, was introduced into the system. The corresponding concentrations in the effluent were reduced to below 300, about 250, and below 15 mg/L, respectively. The sequencing aged refuse process is effective in the fresh leachate treatment, the removal efficiency of COD and TN removal is about 90% and 80% respectively, and the ammonia nitrogen transformation efficiency is about 99.5%. The treatment mechanism of nitrogen removal was studied. In the process, the nitrogen removal is mainly due to the simultaneous nitrification and denitrification in both bioreactors. Recirculated nitrate nitrogen denitrification exists in bioreactor 1, but is not the main nitrogen removal pathway, which is different from the nitrogen removal mechanism in aged leachate treatment.

关键词： Nitrogen Aging Waste materials Bioreactors Biological materials Cities and towns Recycling Raw materials Glass Plastics

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The Adsorption of Microcystins by Polyvinylchloride (PVC) Ultrafiltration Membrane

The Adsorption of Microcystins by Polyvinylchloride (PVC) Ul...

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The 3rd International Conference on Bioinformatics and Biomedical Engineering(iCBBE 2009)(第三届生物信息与生物医学工程国际会议)

作者： Ling Chen Wei-ying Li Ming Zhang Jian Pei State Key Laboratory of Pollution Control & Resource Reuse Tongji University1239 Siping Road Shangh Key Laboratory of Yangtze River Water Environment Ministry of EducationTongji University1239 Sipin College of Environmental Science and Engineering Tongji University1239 Siping Road ShanghaiChina

Cyanobacterial toxins which presented in drinking water sources posed a considerable threat to human health. In this study, the removal of cyanotoxins, including microcystin-RR, microcystin-LR and microcystin-YR, by ultrafiltration (UF) membrane made of polyvinylchloride was investigated. It was found that cyanotoxins were removed mainly by adsorption of PVC membrane, at least at initial stage of the filtration. Adsorption was primarily attributed to hydrophobic interactions, although hydrogen bonding and physical surface properties such as surface roughness, thickness, and porosity may also play role. The initial feed concentration of cyanotoxins had significant influence on the adsorption capacity of PVC membrane, which could be described based on a linear adsorption isotherm in the experimental range.

关键词： Cyanotozins Microcystins Adsorption Polyvinylchloride (PVC) Removal Ultrafiltration membrane

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A new technique to assessing regional environmental carrying status

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Yingyong Jichu yu Gongcheng Kexue Xuebao/Journal of Basic Science and Engineering 2009年第SUPPL. 1期17卷 91-101页

作者： Liu, Renzhi Wang, Chengwen State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Beijing 100875 China Department of Environmental Science and Engineering Tsinghua University Beijing 100084 China

Integrated Assessment of environmental Carrying Capacity(ECC) is one of important tool to detect status of sustainable development for a region. Most of traditional assessments of ECC couldn't discriminate pressure index and state index, and misused pressure index with carrying capacity index. They might not present a real carrying status using linear plus model. Most important is that they couldn't bring out accurate and quantitative assessment results, and couldn't tell the specific degree of over-carrying or carrying. A new model, vector-capacity surplus model, based on computing all parts of ECC, is proposed. Except the carrying capacity index system, a state index system rapidly indicating carrying status and a pressure-mitigated index system showing the level of reducing environmental pressures are suggested.

关键词： Sustainable development

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Adsorption mechanisms of cadmium on crosslinked chitosan templated under microwave irradiation

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Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering 2009年第1期25卷 75-78页

作者： Hao, Hong-Ying Shao, Zi-Qiang He, Meng-Chang State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Beijing 100875 China School of Material Science and Engineering Beijing Institute of Technology Beijing 100081 China

X-ray photoelectron spectroscopy, IR and chemical analysis were employe to study the adsorption mechanisms of crosslinked chitosan (CCTSCd) on cadmium. According to IR, it showed that -NH2 groups of chitosan were protected by template method and others -NH2 groups which didn't complex with cadmium ions took part in crosslinking reaction. Investigating the changes of element binding energy of O1s, C1s, N1s and Cd3d of XPS, there were chemical shifts of both N1s and Cd3d5/2 and Cd3d3/2 of the sample of adsorption comparing with unadsorption, but O1s and C1s hadn't. At the same time, N1s peak had a shoulder peak. The results indicate that -NH2 groups on CCTSCd complexes with cadmium ions by N1s fit spectra. The adsorption is a chemical adsorption and the experimental data fits Freundlich adsorption isotherm. The sorbent has selectivity and memory to metal ions.

关键词： Microwave irradiation

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Temporal-spatial variation and the influence factors of precipitation in Sichuan Province,China

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Frontiers in Biology 2008年第2期3卷 236-240页

作者： Ruimin LIU Zhenyao SHEN State Key Laboratory of Environment Simulation and Pollution Control School of EnvironmentBeijing Normal UniversityBeijing 100875China

Precipitation is a key factor in the water *** the same time,precipitation is the focus of study in meteorology and climatology,ecological environmental assessment,non-point source pollution and so *** the temporal-spatial variation and the corresponding factors of precipitation has become the object of hydrology and *** on the annual precipitation data,we analyzed the spatial distribution of precipitation in Sichuan Province in China as well as the temporal-spatial variation and the corresponding influence factors *** results show that the amount of precipitation was abundant,but the spatial distribution was not consistent with it and the amount of precipitation gradually declined from the south-east to the north-west in Sichuan Province,***,the spatial distribution was different throughout the *** result of correlation analysis indicated that elevation,temperature and air pressure were three key factors affecting the amount and distribution of precipitation,and the correlation coefficients were 20.56,0.38 and 0.45 ***,the relationship between the slope of topography and precipitation were significantly negative and the average correlation coefficient was 20.28.

关键词： Sichuan Province precipitation geostatistics temporal-spatial variation

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Research on regional capability constructive models of clean development mechanism

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Ecological Economy 2009年第2期5卷 112-121页

作者： Chen Leishan Liu Qingqiang Geng Jie Lu Genfa School of the Environment Nanjing University. Nanjing 210093. P. R. China State Key Laboratory of Pollution Control and Resource Reuse. Nanjing 210093 P. R. China Goodlink Environmental Protection International Corporation Center Shandong Jinan 250010 P. R. China

Global climate change has been identified as the first of the top ten environmental problems in the world. As climate change will have serious effects on the social and economic development and everyday, living of people in the world, many of the countries and governments are taking untiring efforts to combat climate change. As one of the important mechanisms of reducing greenhouse gas （GHG） emissions in the Kyoto Protocol, Clean Development Mechanism （CDM） has not only provided chance for developed countries to fulfill greenhouse emission reduction obligations, but also provided an opportunity for developing countries to combat climate change under the sustainable development frame. The dual objectives of developed countries＇ GHG emissions＇ reduction obligation achievement and developing cotmtries＇sustainable development will be achieved under the CDM. As a country with responsibility; China has been positively developing CDM projects and promoting energy saving and emissions reduction during the three yeors after the Kyoto Protocol came into force, and CDM projects development has always been in the front tank in the world. However; as the vast clime within China, notable differences occur in different regions. In order to promote the CDM development in China, it is necessa^T to have regional CDM capability construction in accordance with the practicality in different regions. Based on the Slat Analysis of developed CDM projects and current CDM development status in China, problems in the CDM development of China, including the inefficiency in small and medium-sized CDM Projects＇ development, over centralization of CDM development scope and especially the differentiated provincial CDM projects developing capability are pointed out in the paper： What＇s more, reasons for the problems are analyzed from fire ***, including policy orient, information asymmetry and weak CDM capability, In order to promote CDM projects development in China, a new CDM capabili

关键词： Clean development mechanism （CDM） Capability construction Model

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Ecosystem health assessment of urban rivers and lakes-Case study of “the six lakes”in Beijing,China

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Frontiers of environmental Science & Engineering 2008年第2期2卷 209-217页

作者： Fengling ZHANG Jingling LIU Zhifeng YANG Yongli LI State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentBeijing Normal UniversityBeijing 100875China

The assessment of the ecosystem health of urban rivers and lakes is the scientific basis for their management and ecological *** study developed a three-level indicator system for its *** results indicated that:Zhonghai and Nanhai are in the state of transition from unhealthy to critical state and all the other lakes are in unhealthy *** environmental quality,structure and function of the aquatic ecosystem,and the structure of waterfront areas were the *** was ranked as poor and the others were all ranked as very ***,the ecological environment of Zhonghai and Nanhai were better than the others,the sums of the degree of membership to the healthy state and critical state were all close to *** the restorations of these lakes were *** sums of the degree of membership to the healthy state and critical state of the other lakes were under 0.3,as it was difficult to restore these *** suggestions on scientific management and ecological restoration of the six lakes were proposed:①To control non-point pollution and to improve the water quality of six lakes and the water entering into these lakes;②To improve the hydrological conditions of six lakes;③To rehabilitate the aquatic ecosystem and waterfront areas.

关键词： urban rivers and lakes ecosystem health assessment indicator system the six lakes

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Response of reed community to the environment gradientwater depth in the Yellow River Delta, China

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Frontiers in Biology 2008年第2期3卷 194-202页

作者： Baoshan CUI Xinsheng ZHAO Zhifeng YANG Bin CHEN Na TANG Xuejie TAN State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentBeijing Normal UniversityBeijing 100875China

We investigated and monitored a reed community in the *** on the bio-ecological characteristics and β-diversity of reed communities in different environmental gradients(mainly based on water depth)of the Yellow River Delta were collected through multianalysis,extremum analysis and β-diversity index *** accordance with the square sum of deviations(Ward)cluster analysis,10 sampling plots were divided into six types with the dominant plants in different plots varying according to the change in environmental *** dominant plants in these plots varied from aquatic plants to xerophytes and salt tolerant plants as water depth *** average height and diameter of the reeds at breast level were significantly correlated with the average water *** fitness curves of average density and coverage with average water depth were *** the average water depth was 0.3 m,the average density and coverage of reeds reached the apex value,while the height and diameter of the reeds at breast level increased with the water *** were obvious changes to the environmental gradient in the Yellow River *** transitional communities were also found to exist in the Yellow River Delta by β-diversity *** species appeared with the change in water *** occurrence of substitute species is determined by the function of common species between adjacent *** different functions of common species led to differences in community structure and function and differences in dominant *** result reflects the variations of species present in different habitats and directly reflects environmental *** values of β-diversity indices of adjacent plots were higher than those of nonadjacent *** are transition zones between the xerophytes and aquatic plants in the Yellow River *** an aquatic environment,the similarity of reed community is higher than that of xeromorphic *** β-diversity index can refl

关键词： reed β-diversity environmental gradient wetland the Yellow River Delta

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