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.
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
2002年第2期30-33,共4页
Research of Environmental Sciences
关键词
DGB吸附剂
地下回灌
风险评价
致突物
重金属
DGB adsorbent
groundwater recharge
risk assessment
mutagenicity
heavy metal
