中国环境科学
 
 
中国环境科学  2018, Vol. 38 Issue (7): 2646-2651    DOI:
土壤污染与控制 最新目录| 下期目录| 过刊浏览| 高级检索 |
NZVI/Na2S2O8/超声复合法降解污染土壤PCB-29
刘建福1,2, 李青松1,2, 郭淑娟1
1. 厦门理工学院环境科学与工程学院, 福建 厦门 361024;
2. 环境生物技术福建省高等学校重点实验室, 福建 厦门 361024
Treatment of 2,4,5-trichlorobiphenyl in soil with nanometer zero-valent iron and Na2S2O8 coupled with ultrasonic composite method
LIU Jian-fu1,2, LI Qing-song1,2, GUO Shu-juan1
1. Department of Environmental Science and Engineering, Xiamen University of Technology, Xiamen 361024, China;
2. Key Laboratory of Environmental Biotechnology, Fujian Province University, Xiamen 361024, China

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摘要 

多氯联苯(polychlorinated biphenyls,PCBs)是一类具有高毒性、难降解的有机化合物,为了研发土壤中多氯联苯(PCBs)污染物高效处理技术,本研究采用PCBs中的2,4,5-三氯联苯(PCB-29)作为研究对象,以纳米零价铁(NZVI)活化Na2S2O8,再辅以超声氧化对土壤中PCB-29进行降解试验,结果表明,NZVI/Na2S2O8/超声复合法对污染土壤中PCB-29具有很好的去除效果,降解反应时间为1h时,去除率最高可达86.37%;NZVI/Na2S2O8/超声复合法对PCB-29最佳降解条件为土壤初始pH值为5.0,Na2S2O8浓度为12mmol/L,Na2S2O8/NZVI物质的量比1:1.

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关键词 纳米零价铁PCB-29过硫酸钠土壤污染    
Abstract

Polychlorinated biphenyls (PCBs) are a group of highly toxic and bio-refractory organic compounds. In order to improve the treatment efficiency of PCBs in soil, 2,4,5-trichlorobiphenyl (PCB-29) was chosen as a model pollutant in this study. The degradation experiments of PCB-29 were performed with nanometer zero-valent iron (NZVI) activation sodium persulfate, and coupled with ultrasonic oxidation. The results indicated that the PCB-29 removal rate was 86.37% in one hour by NZVI/Na2S2O8/ultrasonic composite treatment. The optimal degradation conditions of PCB-29with NZVI/Na2S2O8/ultrasonic composite method are soil initial pH 5.0, Na2S2O8 concentration 12mmol/L, the molar ratio of Na2S2O8/NZVI 1:1.

Key wordsnanometer zero-valent iron    2,4,5-trichlorobiphenyl    Na2S2O8    soil pollution   
收稿日期: 2017-11-13     
: X511  
基金资助:

国家自然科学基金资助项目(51008261)

通讯作者: 刘建福,高级实验师,379133828@qq.com     E-mail: 379133828@qq.com
作者简介: 刘建福(1981-),男,湖南邵阳人,高级实验师,硕士,主要从事环境污染治理研究.发表论文20余篇.
引用本文:   
刘建福, 李青松, 郭淑娟. NZVI/Na2S2O8/超声复合法降解污染土壤PCB-29[J]. 中国环境科学, 2018, 38(7): 2646-2651. LIU Jian-fu, LI Qing-song, GUO Shu-juan. Treatment of 2,4,5-trichlorobiphenyl in soil with nanometer zero-valent iron and Na2S2O8 coupled with ultrasonic composite method. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(7): 2646-2651.
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