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Sun S.,Tongji University | Sun S.,Hangzhou Environmental Monitoring Center
Applied Mechanics and Materials

This paper analyzed the importance and necessity of building environmental inspection culture system, then system framework has been constructed by referencing that established in labor security supervision department and disciplinary department. Six cultures in the system are: philosophy culture, responsibility culture, organization culture, behavior culture, system culture and incorruptibility culture. By discussing content of each culture, several recommendations have been made including people-oriented philosophy culture abstraction, high-efficient responsibility culture highlight, distinctive organization culture improvement, internal and external behavior culture enhancement, orderly system culture and complete incorruptibility culture construction. © (2013) Trans Tech Publications, Switzerland. Source

Zhou S.,Zhejiang University of Technology | Tang Q.,Zhejiang University of Technology | Jin M.,Hangzhou Dianzi University | Liu W.,Zhejiang University | And 2 more authors.

The residues and enantiomeric fractions of organochlorine pesticides (OCPs) were measured in 11 mollusk species collected from the coastal areas along the Yangtze River Delta to evaluate the status, potential sources, and health risks of pollution in these areas. The concentrations of DDTs, HCHs, and chlordanes ranged from 6.22 to 398.19, 0.66-7.11, and 0.14-4.08ngg-1 based on wet weight, respectively; DDTs and HCHs have the highest values, globally. The DDTs increased and the HCHs decreased compared to historical data. Both the box-and-whisker plots and the one-way ANOVA tests indicated that the OCP levels varied little between sampling locations and organism species. The compositions of the DDTs and HCHs suggested a cocktail input pattern of fresh and weathered technical products. The comparative EF values for the α-HCH between the sediments and mollusks, as well as the lack of any discernible difference in the relative proportions of HCH isomers among different species from the same sampling site implied that the HCH residues in the mollusks came directly from the surrounding environment. However, the biotransformation of DDTs in mollusks cannot be precluded. The assessments performed based on several available guidelines suggested that although no significant human health risks were associated with the dietary intake of OCPs, the concentrations of DDTs exceeded the maximum residual limits of China and many developed nations. Moreover, an increased lifetime cancer risk from dietary exposure to either DDTs or HCHs remains a possibility. Because non-racemic OCP residues are common in the mollusk samples, our results suggest a need to further explore the levels and toxicity of the chiral contaminants in mollusks and other foodstuff to develop the human risk assessment framework based on chiral signatures. © 2014 Elsevier Ltd. Source

Zhu L.,Zhejiang University | Zhu L.,Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety | Yu H.,Zhejiang University | Liu Y.,Hangzhou Environmental Monitoring Center | And 3 more authors.
Water Science and Technology

The extracellular polymeric substances (EPS) are important macromolecular components in microbial aggregates. The three EPS extraction methods - ultrasound + cation exchange resins (CER) + sulfide, ultrasound + formamide + NaOH, and ultrasound + heat - were investigated in the study, and the component differences of extracted EPS from the loose flocs and dense aerobic granules were compared using chemical analysis and three-dimensional excitation-emission matrix (3D-EEM). Results showed that the contents of EPS were extracted effectively by ultrasound + formamide + NaOH and ultrasound + heat methods, and the ultrasound + CER + sulfide method did not extract the polysaccharides (PS) or protein (PN) contents from the sludge samples. The 3D-EEM analysis indicated that the nature of peak B/D, peak C/E/F, and peak A/G were attributed to PN-like, humic acid-like and fulvic acid-like fluorophores. All fluorophores can be detected from the EPS extracted through the ultrasound + heat method. Hopefully this will provide more information about the EPS interaction mechanism of microbial aggregates. © IWA Publishing 2015. Source

Sun S.,Tongji University | Sun S.,Hangzhou Environmental Monitoring Center
WIT Transactions on Engineering Sciences

This work gave basic information and background of the current situation about the treatment of rural domestic sewage in Hangzhou and analyzed supervision of the rural domestic sewage treatment facilities from three aspects: administration measures, responsibility assessment system, and building ecological towns and villages. The supervision system presently in Hangzhou was unsatisfied in the following aspects: guarantee fund system, information management system, method of supervision, and performance evaluation. There were several recommendations including setting up guarantee fund system; trying multimode of supervision such as property management of rural treatment facilities; establishing information management system, and giving performance evaluation of the facilities. © 2014 WIT Press. Source

Sun S.,Tongji University | Sun S.,Hangzhou Environmental Monitoring Center | Kong W.,Hangzhou Environmental Protection Bureau | Luo R.,Hangzhou Environmental Protection Bureau
Advanced Materials Research

This study is focus on the performance Credit rating system of corporate environmental behavior in Hangzhou. By doing statistical summaries and comparison of rating results of corporate environmental behavior from 2007 to 2010, most firms covered in this rating system in Hangzhou were behaving good or ordinarily toward environment. Corporate covered in the rating system show ineffective performance on promoting their environmental behavior by analyzing their rating results during four years. Some correlation has been found when study the variation of rating results and the pollution issues happened in Hangzhou. A dynamic management of the rating results and environmental behavior label system are recommended for further study and development. © (2012) Trans Tech Publications, Switzerland. Source

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