| ZVI/EDDS/Air体系降解水中2,4-二氯酚的研究 |
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| 引用本文： | 孙倩,周海燕,曹梦华,吴琳娜,王琳玲,陈静,陆晓华.ZVI/EDDS/Air体系降解水中2,4-二氯酚的研究[J].环境科学,2012,33(11):3833-3839. |
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| 作者姓名： | 孙倩 周海燕 曹梦华 吴琳娜 王琳玲 陈静 陆晓华 |
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| 作者单位： | 华中科技大学化学与化工学院,环境科学研究所,武汉430074 |
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| 基金项目： | 国家自然科学基金项目(21077038); 国家高技术研究发展计划(863)项目(2009AA063103,2012AA06A304); 华中科技大学校基金项目(2011TS064) |
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| 摘 要： | 建立零价铁(ZVI)、乙二胺二琥珀酸(EDDS)和曝气三者组成的类Fenton(ZVI/EDDS/Air)处理体系,考察了初始EDDS浓度、铁粉投加量、曝气速率、2,4-二氯酚(2,4-DCP)浓度、初始pH以及反应温度等对水溶液中2,4-DCP降解的影响.结果表明,该体系能有效降解2,4-DCP,并且其降解规律符合准一级动力学方程.在2,4-DCP质量浓度100 mg·L-1、EDDS浓度0.80 mmol.L-1、铁粉投加量20 g·L-1、曝气速率为2 L.(min.L)-1的最佳实验条件下室温反应1 h,2,4-DCP的降解率达到99%.ZVI/EDDS/Air体系对氯酚的降解较ZVI/EDTA/Air体系具有环境友好、反应条件温和,而且对2,4-DCP的降解效果好等优点.
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| 关 键 词： | 零价铁 乙二胺二琥珀酸 2 4-二氯酚 降解 类Fenton体系 |
| 收稿时间： | 1/5/2012 12:00:00 AM |
| 修稿时间： | 2012/3/15 0:00:00 |
Degradation of 2,4-Dichlorophenol in Aqueous Solution by ZVI/EDDS/Air System |
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| SUN Qian,ZHOU Hai-yan,CAO Meng-hu,WU Lin-n,WANG Lin-ling,CHEN Jing and LU Xiao-hua.Degradation of 2,4-Dichlorophenol in Aqueous Solution by ZVI/EDDS/Air System[J].Chinese Journal of Environmental Science,2012,33(11):3833-3839. |
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| Authors: | SUN Qian ZHOU Hai-yan CAO Meng-hu WU Lin-n WANG Lin-ling CHEN Jing and LU Xiao-hua |
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| Affiliation: | Environmental Science Research Institute, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;Environmental Science Research Institute, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;Environmental Science Research Institute, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;Environmental Science Research Institute, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;Environmental Science Research Institute, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;Environmental Science Research Institute, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;Environmental Science Research Institute, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China |
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| Abstract: | A new oxidation system of Fenton-like system (ZVI/EDDS/Air) has been developed to degrade 2,4-chlorophenols (2,4-DCP) in aqueous solution. The influences of initial conditions, i. e., EDDS concentration, iron dosage, aeration rate, 2,4-DCP concentration and pH as well as reaction temperature on the degradation of 2,4-DCP were studied. The results demonstrated that this ZVI/EDDS/Air system was able to effectively degrade 2,4-DCP in aqueous solution, and the degradation of 2,4-DCP conforms to the pseudo-first-order reaction kinetics equation. Removal of above 99% 2,4-DCP was achieved in ZVI/EDDS/Air system at room temperature and pressure after 1 h reaction when the initial conditions were 2,4-DCP 100 mg·L-1, EDDS 0.80 mmol·L-1, ZVI 20 g·L-1, aeration rate 2 L·(min·L)-1. Compared with ZVI/EDTA/Air system, ZVI/EDDS/Air system showed higher efficiency in the degradation of 2,4-DCP at ambient circumstance and was more environmentally benign. |
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| Keywords: | ZVI EDDS 2 4-dichlorphenol degradation Fenton-like system |
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