铁氧化物与丙酸对土壤中六氯苯厌氧降解影响  

Effect of iron oxide and propionic acid on anaerobic degradation of hexachlorobenzene in soil

作　　者：刘翠英[1,2] 王宇 马煜春 

机构地区：[1]南京信息工程大学气象灾害预报预警与评估协同创新中心/江苏省农业气象重点实验室,江苏南京210044 [2]中国科学院南京土壤研究所土壤环境与污染修复重点实验室,江苏南京210008 [3]南京信息工程大学应用气象学院,江苏南京210044

出　　处：《中国环境科学》2018年第3期1073-1080,共8页China Environmental Science

基　　金：江苏省农业气象重点实验室(南京信息工程大学)开放课题(JKLAM1605);中国科学院土壤环境与污染修复重点实验室(南京土壤研究所)开放基金课题(SEPR2017-4)

摘　　要：采用红壤性水稻土进行厌氧培养试验,设定灭菌对照、对照、丙酸、针铁矿、丙酸+针铁矿5个处理,分析铁氧化物、丙酸及其交互作用对土壤中六氯苯还原脱氯过程的影响及其反应机制.结果表明,培养40d后,5个处理的土壤中六氯苯可提取态残留量分别减少了26.9%、48.5%、63.4%、56.9%和72.9%;六氯苯还原脱氯主要生成五氯苯;添加丙酸在整个培养过程均显著促进六氯苯还原脱氯降解;添加针铁矿在培养前期促进六氯苯还原脱氯的效果明显;同时添加丙酸和针铁矿对促进六氯苯还原脱氯具有协同作用.To investigate the effects of iron oxide, propionic acid and their interaction on the reductive dechlorination ofhexachlorobenzene （HCB） in soils and their reaction mechanisms, an anaerobic incubation experiment was conducted inHydragric Acrisols with five treatments： sterile control, control, propionic acid, goethite, and propionic acid ＋ goethite.Results showed that HCB residues for these five treatments decreased by 26.9%, 48.5%, 63.4%, 56.9%, and 72.9%compared to the initial quantities, respectively, after 40d of incubation, and pentachlorobenzene （PeCB） was the dominantproduct of HCB dechlorination. The addition of propionic acid significantly accelerated the reductive dechlorinationdegradation of HCB throughout the incubation. The application of goethite obviously promoted HCB dechlorination in theearly incubation period. The application of propionic acid and goethite resulted in a synergistic effect on accelerating thedechlorination of HCB.

关 键 词：六氯苯 还原脱氯 针铁矿 丙酸 红壤性水稻土 

分 类 号：X131.3[环境科学与工程—环境科学]