土壤中零价铁还原3-氯硝基苯的作用  

Reduction of m-chloronitrobenzene by zero-valent iron in soil

作　　者：谢凝子[1] 吴双桃[1] 陈少瑾[1] 邱罡[1] 

机构地区：[1]韩山师范学院环境化学应用技术研究所,潮州521041

出　　处：《环境工程学报》2009年第2期359-362,共4页Chinese Journal of Environmental Engineering

基　　金：广东省自然科学基金项目(04106270)

摘　　要：利用零价铁在常温常压下对土壤中的3-氯硝基苯的还原,对反应物和产物随时间的变化及反应的各个影响因素进行了研究。实验结果表明,零价铁能够有效地将3-氯硝基苯还原为3-氯苯胺,反应过程中没有检测到脱氯产物。其反应速率随铁粉用量、反应体系含水量的增加以及反应温度的升高而升高,随土壤初始pH值的升高而降低。在土壤中3-氯硝基苯含量约为2.5×10-6mol/g,铁粉使用量为25 mg/g,反应体系中含水量为0.75 mL/g,pH值为6.8时,在恒温生化培养箱(25±1)℃反应5 h后,3-氯硝基苯的还原率达到92.75%。The reduction of m-chloronitrobenzene in soil by zero-valent iron （ZVI） at normal temperature and pressure was studied. The experimental results demonstrated that ZVI could reduce m-chloronitrobenzene （MCNB） efficiently. No dechlorinated product of MCNB was observed. The reduction rates increased with higher dosages of ZVI, higher reaction temperature and higher soil water contents, but decreased with increasing soil pH. When the initial concentration of MCNB was 2.5×10^-6mol/g, the dosage of ZVI was 25 mg/g the content of water was 0.75 mL/g, and the initial pH of soil was 6.8, the reduction rate of m-chloronitrobenzene was 92. 75% after a incubation at （25 ± 1）℃ in 5 hours.

关 键 词：零价铁 3-氯硝基苯 还原 土壤 

分 类 号：X144[环境科学与工程—环境科学]