Sources, speciation and transformation of arsenic in the gold mining impacted Jiehe River, China

doi:10.1016/j.apgeochem.2017.07.001

CORC > 烟台海岸带研究所 > 中国科学院烟台海岸带研究所 > 中科院海岸带环境过程与生态修复重点实验室 > 近岸生态与环境实验室

	Sources, speciation and transformation of arsenic in the gold mining impacted Jiehe River, China
	Cai, YB ; Zhang, H ; Yuan, GD ; Li, FY
刊名	APPLIED GEOCHEMISTRY
	2017-09
卷号	84 页码:254-261
关键词	Gold mining Arsenic Iron Colloid Modeling
ISSN号	0883-2927
DOI	10.1016/j.apgeochem.2017.07.001
产权排序	[Cai, Yongbing ; Li, Feiyue] Anhui Sci & Technol Univ, Coll Resource & Environm, Huainan 233100, Anhui, Peoples R China ; [Cai, Yongbing ; Zhang, Hua ; Yuan, Guodong] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Beijing 264003, Shandong, Peoples R China
文献子类	Article
英文摘要	Mining-contaminated waters may contain high levels of arsenic (As) and iron (Fe), among various metals and metalloids. The complex behavior of As makes its contamination difficult to remediate. This study aimed to determine the sources, possible association of As and Fe with colloids and their speciation and mobility in the Jiehe River, a stream impacted by gold mining. Particulate (>450 nm), colloidal (7 -450 nm), and truely dissolved (<7 nm) forms of As and Fe were determined, and the species of As [As(ill), As(V), monomethylarsonic acid, and dimethylarsinic acid] and Fe [Fe(II) and Fe(IlI)] were both analyzed and modelled using geochemical program Visual MinteQ 3.0. High concentrations of As and Fe were observed in both filtered and particulate forms in most of the water samples. Total As was in the range of 1.0-719 mu g L-1 with a median of 140 mu g L-1. Total Fe was 0.4-68.2 mg L-1 with a median of 15.0 mg L-1. Arsenic was mainly adsorbed on ferrihydrite, goethite, and hematite in the upstream water samples. In contrast, it was mostly in truely dissolved forms in the water samples at downstream. Visual MinteQ 3.0 modelling results revealed that As adsorbed on, or co-precipitated with, stream sediment can be easily released under the environmental conditions of the downstream reach (11.4-37.5 km). These findings would benefit the environmental management of gold mining impacted Jiehe River, and indicate the need for further quantitative research on As migration facilitated by Fe (hydr) oxide colloids and the release of As from contaminated stream sediments. (C) 2017 Elsevier Ltd. All rights reserved.
WOS关键词	Gold mining ; Arsenic ; Iron ; Colloid ; Modeling
WOS研究方向	Geochemistry & Geophysics
语种	英语
WOS记录号	WOS:000410673400020
资助机构	National Natural Science Foundation of China [41271506, 41230858, 21607002] ; Key Research Program of the Chinese Academy of Sciences [KZZD-EW-14] ; Recruitment Program of Global Young Experts (1000Plan)
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/24360]
专题	烟台海岸带研究所_近岸生态与环境实验室烟台海岸带研究所_污染过程与控制实验室
作者单位	1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Beijing 264003, Shandong, Peoples R China 2.Anhui Sci & Technol Univ, Coll Resource & Environm, Huainan 233100, Anhui, Peoples R China;
推荐引用方式 GB/T 7714	Cai, YB,Zhang, H,Yuan, GD,et al. Sources, speciation and transformation of arsenic in the gold mining impacted Jiehe River, China[J]. APPLIED GEOCHEMISTRY,2017,84:254-261.
APA	Cai, YB,Zhang, H,Yuan, GD,&Li, FY.(2017).Sources, speciation and transformation of arsenic in the gold mining impacted Jiehe River, China.APPLIED GEOCHEMISTRY,84,254-261.
MLA	Cai, YB,et al."Sources, speciation and transformation of arsenic in the gold mining impacted Jiehe River, China".APPLIED GEOCHEMISTRY 84(2017):254-261.