零价铁对土壤中硝基苯类化合物的还原作用  

Reduction action of zero-valent iron on nitrobenzene compounds in soils.

作　　者：吴双桃[1] 陈少瑾[1] 胡劲召[1] 谢凝子[1] 陈宜菲[1] 

机构地区：[1]韩山师范学院环境化学应用技术研究所,广东潮州521041

出　　处：《中国环境科学》2005年第2期188-191,共4页China Environmental Science

基　　金：广东省科技攻关项目(2003C32910);广东省自然科学基金资助项目(04106270)

摘　　要：用气相色谱-质谱联用仪(GC-MS)对零价铁在常温常压下还原3种土壤中对硝基苯和间二硝基苯进行了研究.结果表明,硝基苯类化合物转化为苯胺等化合物,对硝基苯和间二硝基苯2种化合物在黏土中的还原率分别达到91%和90%.不同土壤物理化学性质与硝基苯类化合物的还原率有密切关系,表现为黏土>轻壤土>砂土的规律;中性偏酸的土壤有利于硝基苯类化合物的还原和降解,降解率随有机质含量升高而增高.The reduction of p-nitrobenzene (PNT) and w-dinitrobenzene (MDNB) in three kinds of soils by zero-valent iron (ZVI) at normal temperature and pressure was studied using gas chromatography-mass spectrometry (GC-MS). nitrobenzene compounds transformed into benzylamine compounds; the reduction rates of PNT and MDNB in clay were highest, reaching 91% and 90%, respectively. In addition, there was close relation between the physicochemical properties of different soils and the reduction rates of Nitrobenzene compounds, showing the rule of clay > light loam > sand. The soil of acidic of neutral pH value was favorable to the reduction and degradation of nitrobenzene compounds; the degradation rate increased with increase of organic matter content.

关 键 词：零价铁 对硝基甲苯 间二硝基苯 还原 

分 类 号：X144[环境科学与工程—环境科学]