Reductive transformation and detoxification mechanism of 2,4-dinitrochlorobenzene in combined zero valent iron and anaerobic-aerobic process

作     者：Jinyou Shen Zongyuan Zhou Changjin OU Xiuyun Sun Jiansheng Li Weiqing Han Lin Zhou Lianjun Wang 

作者机构：Jiangsu Key Laboratory of Chemical Pollution Control and Resources ReuseSchool of Environmental and Biological EngineeringNanjing University of Science and TechnologyNanjing 210094China School of Mechatronical EngineeringBeijing Institute of TechnologyBeijing 100081China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2012年第24卷第11期

页      面：1900-1907页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：financed by the Innovation Program of Foundation Product the National Natural Science Foundation of China (No.50978136, 51208258) the Major Project of Water Pollution Control and Management Technology of China (No.2012ZX07101-003-001) the Natural Science Foundation of Jiangsu Province (No.BK2011717) the China Post doctoral Science Foundation(No.2011M500927) the Jiangsu Planned Projects for Postdoctoral Research Funds (No.1101014C) the Fundamental Research Funds for Central Universities (No.NUST2011ZDJH20, NUST2011PYXM05) 

主　　题：2,4-dinitrochlorobenzene zero-valent iron toxicity biodegradability 

摘      要：A combined zero valent iron （ZVI） and anaerobic-aerobic process was adopted for the treatment of 2,4-dinitrochlorobenzene （DNCB）- containing wastewater. The transformation pathway, reduction of acute toxicity and enhancement of biodegradability were investigated, After pretreatment by ZVI, DNCB in wastewater could be completely converted into 2,4-diaminochlorobenzene （DACB）. The ratio of BODs/COD increased from 0.005±0.001 to 0.168±0.007, while EC50,48hr （V/V） increased from 0.65% to 5.20%, indicating the enhancement of biodegradability and reduction of acute toxicity with the pretreatment by ZVI. DACB was further dechlorinated to m-phenylenediamine during the anaerobic process using methanol as electron donor, with EC50＇ 48 hr increasing from 5.20% to 48.2%. After the subsequent anaerobic-aerobic process, m-phenylenediamine was degraded completely, with effluent COD of 67.5±10.8 mg/L. This effluent of the subsequent anaerobic-aerobic process was not toxic to zebrafish. The combined ZVI and anaerobic-aerobic process offers bright prospects for the treatment of chlorinated nitroaromatic compound-containing wastewater.