Permeable reactive barrier of coarse sand-supported zero valent iron for the removal of 2,4-dichlorophenol in groundwater

被引：0
作者：
Weichun Gao
Yongxiang Zhang
Xiaoye Zhang
Zhilong Duan
Youhao Wang
Can Qin
Xiao Hu
Hao Wang
Shan Chang
机构：
[1] Beijing University of Technology,Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering
来源：
Environmental Science and Pollution Research | 2015年 / 22卷
关键词：
2,4-dichlorophenol; Dechlorination; Permeable reactive barrier; Zero valent iron; Coarse sand; Groundwater;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In this study, coarse sand-supported zero valent iron (ZVI) composite was synthesized by adding sodium alginate to immobilize. Composite was detected by scanning electron microscope (SEM), X-ray diffraction (XRD), and X-ray fluorescence (XRF). SEM results showed that composite had core-shell structure and a wide porous distribution pattern. The synthesized composite was used for degradation of 2,4-dichlorophenol (2,4-DCP) contamination in groundwater. Experimental results demonstrated that degradation mechanism of 2,4-DCP using coarse sand-supported ZVI included adsorption, desorption, and dechlorination. 2,4-DCP adsorption was described as pseudo-second-order kinetic model. It was concluded that dechlorination was the key reaction pathway, ZVI and hydrogen are prime reductants in dechlorination of 2,4-DCP using ZVI.
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页码：16889 / 16896
页数：7
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