岩溶管道中苯和甲苯自然衰减与反硝化增强修复实验研究  

Experimental Study on the Natural Attenuation and Denitrifying-Enhanced Remediation of Benzene and Toluene in Karst Conduit Flow

作　　者：郑民杰 蒋亚萍[1] 陈余道[1] 

机构地区：[1]桂林理工大学环境科学与工程学院,广西桂林541004

出　　处：《工业安全与环保》2017年第4期80-83,共4页Industrial Safety and Environmental Protection

基　　金：国家自然科学基金(41172229)

摘　　要：利用碳酸盐岩管道模型调查了不同流量条件下苯和甲苯的自然衰减行为,以及通过添加高浓度硝酸盐了解苯和甲苯的增强生物修复效果。结果表明:1岩溶管道中苯和甲苯存在明显的自然衰减,有氧降解是其重要的路径;2管道流量越大,对苯和甲苯浓度的衰减越不利;3添加硝酸盐难以促进反硝化去除苯和甲苯。影响自然衰减和增强修复效果的主要因素除了管道流量外,更主要的可能是由于管道内固体表面积小而不利用于微生物生长与发育。In this study the natural attenuation behavior of benzene and toluene at different flow is investigated by a carbon- ate - conduit model, and the denitrifying - enhanced remediation effects of them are introduced by adding high concentration of nitrate. The results indicate that： ①in the karst conduit, benzene and toluene exists obvious natural attenuation, moreover, aerobic degradation is the important path; ②The greater conduit flow is, the worse it is for attenuation of benzene and toluene; ③Adding nitrate is difficult to promote denitrification removal of benzene and toluene. The main influences on natural attenuation and denitrifying - enhanced remediation is not only conduit flow, more importantly also the small conduit solid surface area hinder indigenous microbial growth and development.

关 键 词：碳酸盐岩管道模型 苯 甲苯 自然衰减 反硝化增强修复 

分 类 号：X523[环境科学与工程—环境工程]