Investigating the efficiency of microscale zero valent iron-based in situ reactive zone (mZVI-IRZ) for TCE removal in fresh and saline groundwater

doi:10.1016/j.scitotenv.2018.01.115

	Investigating the efficiency of microscale zero valent iron-based in situ reactive zone (mZVI-IRZ) for TCE removal in fresh and saline groundwater
	Xin, Jia 1; Tang, Fenglin 1; Yan, Jing 2; La, Chenghong 1; Zheng, Xilai 1; Liu, Wei 3
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2018-06
卷号	626 页码:638-649
关键词	Electron efficiency Fresh groundwater Microscale zero valent iron (mZVI) Permeability loss Saline groundwater Trichloroethylene (TCE) removal
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2018.01.115
英文摘要	In this study, long-term column experiments were conducted in three media (Milli-Q water, fresh groundwater and saline groundwater) to evaluate the trichloroethylene (TCE) removal performance, electron efficiency (EE), and permeability loss of a microscale zero valent iron-based in situ reactive zone (mZVI-IRZ) under different field conditions. A potential scenario of in situ contamination plume remediationwas simulated by adding a TCE-containing influent to columns filled with mixed mZVI particles and silica sand at a flow rate of 4 mL h(-1) for 6 months. Results showed that, over the course of 100 pore volumes (PV) for 6 months, mZVI displayed the lowest TCE breakthrough rate (0.0026 PV-1) and highest TCE removal capacity (43.72 mg) but the poorest EE value (25-40%) in saline groundwater. Mineral characterization (SEM, XRD), ion concentration analysis, and geochemical modeling corroborated that different dominant solid precipitates (magnetite, siderite, dolomite/magnetite) were identified inside the three columns. The column containing saline groundwater experienced the greatest porosity loss, approximately 30.23mL over the course of 100 PVs. This study illustrates that, to improve designs of mZVI-IRZs, EE as well as hydraulic conductivity should be taken into consideration for predictive evaluations. (C) 2018 Elsevier B.V. All rights reserved.
资助项目	China Postdoctoral Science Special Foundation[2017T100517]
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000428194000063
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/10827]
专题	自然资源部第一海洋研究所
通讯作者	Xin, Jia; Liu, Wei
作者单位	1.Ocean Univ China, Coll Environm Sci & Engn, Shandong Prov Key Lab Marine Environm & Geol Engn, Key Lab Marine Environm Sci & Ecol,Minist Educ, Qingdao 266100, Peoples R China 2.State Ocean Adm, North China Sea Maritime Engn Prospecting Inst, Qingdao 266033, Peoples R China 3.Shandong Univ, Sch Environm Sci & Engn, Jinan 250100, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Xin, Jia,Tang, Fenglin,Yan, Jing,et al. Investigating the efficiency of microscale zero valent iron-based in situ reactive zone (mZVI-IRZ) for TCE removal in fresh and saline groundwater[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,626:638-649.
APA	Xin, Jia,Tang, Fenglin,Yan, Jing,La, Chenghong,Zheng, Xilai,&Liu, Wei.(2018).Investigating the efficiency of microscale zero valent iron-based in situ reactive zone (mZVI-IRZ) for TCE removal in fresh and saline groundwater.SCIENCE OF THE TOTAL ENVIRONMENT,626,638-649.
MLA	Xin, Jia,et al."Investigating the efficiency of microscale zero valent iron-based in situ reactive zone (mZVI-IRZ) for TCE removal in fresh and saline groundwater".SCIENCE OF THE TOTAL ENVIRONMENT 626(2018):638-649.