DGB处理二级出水用于地下回灌的风险评价  

Risk Assessment of Reclaimed Secondary Effluent with DGB Treatment for Groundwater Recharge

作　　者：皮运正[1] 云桂春[1] 张丽萍[1] 

机构地区：[1]清华大学核能技术设计研究院,北京100084

出　　处：《环境科学研究》2002年第2期30-33,共4页Research of Environmental Sciences

摘　　要：以北京高碑店二级出水为对象 ,进行了二级出水地下回灌的DGB深度处理工艺的风险评价。GC MS探测到的优先污染物四氯化碳引起的致癌风险小 ,可以忽略。二级出水经深度处理 ,除Cd ,Cr略高于回灌标准 ,其余重金属含量低于回灌要求 ;通过加氯消毒 ,可满足回灌水卫生要求。DGB和土壤含水层处理工艺可去除部分致突物 ,残余的主要是移码型氯化致突物 。The secondary effluent from Gaobeidian Sewage Treatment Plant was treated with the DGB tertiary process for groundwater recharge.Health risk assessment showed that the cancer risk caused by CCl\-4 detected by GC/MS analysis were tiny and could be neglected.In the reclaimed wastewater,the concentrations of heavy metals were lower than the groundwater recharge standard except for Cd and Cr,which exceeded the criteria slightly.The sanitary requirement of reclaimed wastewater can reach the groundwater recharge standard with chlorine disinfections.DGB adsorption combined with soil aquifer treatment (SAT) could remove a part of mutagenicity.Frameshift mutagens were the major residue,which were with rather stong mutagenicity.

关 键 词：DGB吸附剂 地下回灌 风险评价 致突物 重金属 

分 类 号：X820.4[环境科学与工程—环境工程]