| 引用本文: | 沈吉敏,朱佳裔,陈忠林,刘宇,任南琪.Fe0／H2O2类Fenton体系降解水中对氯硝基苯[J].哈尔滨工业大学学报,2011,43(12):86.DOI: |
| SHEN Ji-min,ZHU Jia-yi,CHEN Zhong-lin,LIU Yu,REN Nan-qi.Degradation of para-chloronitrobenzene by Fe0／H2O2 Fenton-like[J].Journal of Harbin Institute of Technology,2011,43(12):86.DOI: |
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| 摘要: |
| 为解决传统Fenton过程中Fe3+返回Fe2+速率慢致使反应过程中铁离子循环受阻的瓶颈问题,对Fe0／H2O2-类Fenton降解对氯硝基苯(pCNB)的效果与机理进行研究．考察H2O2和铁的投加量、初始pH值等因素对pCNB降解效果的影响,对体系TOC和Cl-、NO3-浓度以及一些中间产物进行鉴定和分析．当pH值为5,铁、H2O2、pCNB初始投量分别为200、3.5、20 mg／L,反应20 min时,Fe0／H2O2类Fenton体系能将pCNB去除73％．在相同pH值、铁和H2O2投加量情况下,Fe0／H2O2-类Fenton法对pCNB的降解效率比传统Fenton法高20％～30％,pH值在3.5～7.0内,该体系对pCNB都具有很好的降解去除作用．pCNB在降解过程中没有被完全矿化,苯环上的—Cl和—NO2也没有完全转化为无机离子,主要中间产物为草酸、羟基乙酸、乙酸、马来酸、对硝基酚、对氯酚、2-氯-5-硝基酚、5-氯-2-硝基酚等． |
| 关键词: 类Fenton 单质铁 对硝基氯苯 中间产物 反应历程 |
| DOI： |
| 分类号:X703.1 |
| 文献标识码:A |
| 基金项目:教育部高等学校博士点专项科研基金资助项目(200802131055)；哈尔滨工业大学科研创新基金资助项目(HIT.NSRIF2008.67);哈尔滨市科技创新人才研究专项资金资助项目(2008RFQXS038). |
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| Degradation of para-chloronitrobenzene by Fe0／H2O2 Fenton-like |
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SHEN Ji-min,ZHU Jia-yi,CHEN Zhong-lin,LIU Yu,REN Nan-qi
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(State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering,Harbin Institute of Technology, 150090 Harbin, China, sjm1973@sohu.com)
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| Abstract: |
| Para-chloronitrobenzene degradation by Fenton-like with zero-valent iron and hydrogen peroxide was studied in depth for the purpose to solve the circulation of iron ions suffocated caused by the slow rate of Fe3+ returns Fe2+ in the traditional Fenton reaction. Different effects of hydrogen peroxide and iron dose, initial pH value and others factors were investigated. Para-chloronitrobenzene removal efficiency of 73％ was achieved under optimal reaction conditions of pH value 5, with dosage of 200 mg／L zero-valent iron, and 3.5 mg／L of hydrogen peroxide after 20 min. The Removal efficiency of para-chloronitrobenzene by Fe0／H2O2 Fenton-like increased 20％-30％ than the traditional Fenton reaction under the same dosage of iron and hydrogen peroxide, and the same of pH value. And in 3-7 range of the pH value, para-chrornitrobenzene degradation effects were obvious by Fe0／H2O2 Fenton-like. The choro-(—Cl) and nitro-(—NO2) on the phenyl were transformed inorganic ions incomplete. The main intermediates were oxalic acid, glycolic acid, acetic acid, maleic acid, p-nitrophenol, p-chlorophenol, 2-chloro-5-nitrophenol, 5-chloro-2-nitrophenol. An degradation pathway of the para-chloronitrobenzene was also proposed. |
| Key words: Fenton-like chrornitrobenzene zero-valent iron para-chrornitrobenzene intermediate products degradation pathway |
