可渗透反应墙材料对农田退水中氮、磷和PPCPs的截留作用  

Removing nitrogen,phosphorus,and PPCPs from cropland drainage using permeable reactive barrier materials

作　　者：吴冰兴 石亚楠[1] 牟文燕[1] 曾祥峰[1] 陈希娟[1] 庄杰[1] 

机构地区：[1]污染生态与环境工程重点实验室,中国科学院沈阳应用生态研究所,沈阳110016 [2]中国科学院大学,北京100049

出　　处：《生态学杂志》2017年第2期563-568,共6页Chinese Journal of Ecology

基　　金：国家水体污染控制与治理科技重大专项项目(2015ZX07202-012)资助

摘　　要：农业面源污染是河流湖泊污染的主要来源,农田退水中含有的大量氮、磷以及药品与个人护理用品(PPCPs)等新型有机污染物造成湖泊、河流污染。本研究通过饱和土柱实验,研究零价铁和生物炭两种可渗透反应墙材料对模拟农田退水中的氮、磷和PPCPs(卡马西平、布洛芬、双酚A)的截留效果。结果表明:在1 m L·min^(-1)流速,p H=7,磷初始浓度为11.73 mg·L^(-1)的条件下,生物炭对磷不存在截留作用,而零价铁对磷的截留量为88.7mg·kg^(-1);同样条件,卡马西平、布洛芬、双酚A初始浓度为5 mg·L^(-1),生物炭对这3种污染物的截留量分别为328.0、99.8、385.4 mg·kg^(-1),分别是零价铁截留量的57.5、66.5和83.8倍。不同可渗透反应墙材料对不同污染物的截留效果不同,在处理实际农田退水时,应考虑多种材料的选择和组合。Agricultural nonpoint pollution is a main contamination source of groundwater, which contains numerous phosphorus and ammonia, leading to the eutrophication of rivers and lakes. Permeable reactive barrier （PRB） is an insitu remediation technology, which has been developed in the last decade for remediation of groundwater. In this research, zerovalent iron （ZVI） and biochar, which are known as effective material in PRB, were used in the remediation of phosphorus, ammonia and PPCPs in simulated cropland drainage. Under the flow rate of 1 mL·min^-1, pH 7, and phosphorus concentration 11.73 mg·L^-1, ZVI reacted with phosphorus at rate of 88.7 mg·kg^-1, while no significant removal of phosphorous by biochar was observed. How-ever, under the same condition, the sorption capacity for cambamazipine, ibuprofen and bisphenolA by biochar was detected as 328.0, 99.8, 385.4 mg·kg^-1, respectively, which was 57.5, 66.5, 83.8 times higher than ZVI. The interception effect of different PRB materials on pollutants was different. Therefore, selection and combination of various materials should be taken into consideration when dealing with cropland drainage in the actual field.

关 键 词：零价铁 生物炭 可渗透反应墙 PPCPS 

分 类 号：X71[环境科学与工程—环境工程] X52