危险废物环境治理体系和治理能力现代化建设初探

生态环境治理体系和治理能力现代化是打赢污染防治攻坚战的必然要求,是推进生态文明建设、加快实现美丽中国目标的内在需求。危险废物污染防治是生态文明建设和生态环境保护的重要方面,是打赢污染防治攻坚战的重要内容。本文在分析我国危险废物环境管理现状的基础上,针对现阶段危险废物环境管理和利用处置能力方面存在的短板,提出了以下加强危险废物环境治理体系和治理能力现代化建设的对策与建议:健全完善危险废物环境治理政府领导责任体系;健全完善危险废物环境治理企业主体责任体系和全民行动体系;健全完善危险废物环境治理政策法规体系;健全完善危险废物环境治理监督管理体系。     

Investigation of colloidal biogenic sulfur flocculation: Optimization using response surface analysis

The colloidal properties of biogenic elemental sulfur(S~0)cause solid–liquid separation problems,such as poor settling and membrane fouling.In this study,the separation of S~0 from bulk liquids was performed using flocculation.Polyaluminum chloride(PAC),polyacrylamide(PAM)and microbial flocculant(MBF)were compared to investigate their abilities to flocculate S~0 produced during the treatment of sulfate-containing wastewater.A novel approach with response surface methodology(RSM)was employed to evaluate the effects and interactions of flocculant dose,pH and stirring intensity,on the treatment efficiency in terms of the S~0 flocculation and the supernatant turbidity removal.The dose optimization results indicated that the S~0 flocculation efficiency decreased in the following order PACMBFPAM.Optimum S~0 flocculation conditions were observed at pH 4.73,a stirring speed of 129 r/min and a flocculant dose of 2.42 mg PAC/mg S.During optimum flocculation conditions,the S~0f locculation rate reached 97.53%.Confirmation experiments demonstrated that employing PAC for S~0 flocculation is feasible and RSM is an efficient approach for optimizing the process of S~0 flocculation.The results provide basic parameters and conditions for recovering sulfur during the treatment of sulfate-laden wastewaters.     

Does industrial collaborative agglomeration improve environmental efficiency? Insights from China’s population structure

Environmental Science and Pollution Research - Nowadays, the development of green economy and the improvement of environmental efficiency have been a hotspot in both academia and industry....     

Chemically-Crosslinked Xylan/Graphene Oxide Composite Hydrogel for Copper Ions Removal

Journal of Polymers and the Environment - The chemically-crosslinked composite hydrogel based on acylated xylan and silanized graphene oxide was prepared via free radical polymerization as a novel...