| 纳米零价铁铜双金属体系对土壤中四氯双酚A的降解 |
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| 引用本文： | 付欣,梁莉,李筱琴,杨琛.纳米零价铁铜双金属体系对土壤中四氯双酚A的降解[J].环境科学学报,2018,38(4):1606-1612. |
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| 作者姓名： | 付欣 梁莉 李筱琴 杨琛 |
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| 作者单位： | 华南理工大学环境与能源学院;陡埠(武汉)科技服务有限公司;工业聚集区污染控制与生态修复教育部重点实验室华南理工大学;固体废物处理与资源化广东省环境保护重点实验室; |
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| 基金项目： | 广东省自然科学基金项目（No.2016A030313507）；国家自然科学基金面上项目（No.41773107） |
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| 摘 要： | 纳米零价铁及其双金属材料因比表面积大、反应活性高,已被大量应用于地下水中卤代有机污染物、无机盐和重金属的处理,而将纳米零价铁铜双金属(Cu/n ZVI)应用于四氯双酚A(TCBPA)污染土壤的修复却鲜见报道.本文以Cu/nZVI为反应材料,探究了TCBPA起始浓度,Cu/n ZVI投加量、p H、温度等因素对土壤中TCBPA降解率的影响.批实验结果表明:反应温度为25℃,经过360 min的反应后,0.30 g的Cu/n ZVI对土壤中0.8 mg·g~(-1)TCBPA的降解率可达85%以上.Cu/n ZVI对土壤中TCBPA的降解率随TCBPA初始浓度的增加而降低,随Cu/n ZVI投加量的增加而升高,随土壤初始p H的增加而降低,Cu/n ZVI对TCBPA的降解在常温条件下即可有效的进行.Cu/nZVI对TCBPA的降解遵循准一级反应动力学模型.GC-MS结果表明,Cu/n ZVI降解TCBPA是一个逐步还原脱氯的过程.
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| 关 键 词： | Cu/nZVI 四氯双酚A 准一级反应动力学 还原脱氯 |
| 收稿时间： | 2017/9/21 0:00:00 |
| 修稿时间： | 2017/11/28 0:00:00 |
Degradation of tetrachlorobisphenol A in soil by nanoscale zero-valent Copper/Iron bimetallic particles |
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| FU Xin,LIANG Li,LI Xiaoqin and YANG Chen.Degradation of tetrachlorobisphenol A in soil by nanoscale zero-valent Copper/Iron bimetallic particles[J].Acta Scientiae Circumstantiae,2018,38(4):1606-1612. |
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| Authors: | FU Xin LIANG Li LI Xiaoqin and YANG Chen |
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| Institution: | 1. College of Environment and Energy, South China University of Technology, Guangzhou 510006;2. Wuhan Benbu Technology Co., Ltd., Wuhan 430000,1. College of Environment and Energy, South China University of Technology, Guangzhou 510006;2. The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters of the Ministry of Education, South China University of Technology, Guangzhou 510006;3. Guangdong Environmental Protection Key Laboratory of Solid Waste Treatment and Recycling, Guangzhou 510006,1. College of Environment and Energy, South China University of Technology, Guangzhou 510006;2. The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters of the Ministry of Education, South China University of Technology, Guangzhou 510006;3. Guangdong Environmental Protection Key Laboratory of Solid Waste Treatment and Recycling, Guangzhou 510006 and 1. College of Environment and Energy, South China University of Technology, Guangzhou 510006;2. The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters of the Ministry of Education, South China University of Technology, Guangzhou 510006;3. Guangdong Environmental Protection Key Laboratory of Solid Waste Treatment and Recycling, Guangzhou 510006 |
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| Abstract: | Due to its large special surface and high reactivity, nanoscale zero-valent iron and its bimetallic particles have been widely applied to remediate organic pollutants, inorganics, and heavy metals in groundwater. However, the application of Cu/nZVI for the remediation of Tetrachlorobisphenol A (TCBPA) contaminated soil have been rarely reported. In this paper, the influence of initial TCBPA concentration, Cu/nZVI dosage, initial solution pH and temperature for the degradation of TCBPA by 0.5 wt% Cu/nZVI were studied. Batch experiments showed that the reaction can be effectively carried out under ambient conditions. TCBPA (0.8 mg·g-1) could be degraded within 360 min by 0.30 g Cu/nZVI. The degradation rates decreased with the increase of initial TCBPA concentration and soil pH. Pseudo-first-order kinetics model could be used to fit the degradation of TCBPA by Cu/nZVI. GC-MS results elucidated that the degradation of TCBPA followed a step by step dechlorination process. |
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| Keywords: | Cu/nZVI TCBPA pseudo-first-order kinetics reductive dechlorination |
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