Multivariate analysis of the heterogeneous geochemical processes controlling arsenic enrichment in a shallow groundwater system

doi:10.1080/10934529.2014.854689

CORC > 中国地质调查局 > 中国地质调查局 > 中国地质科学院水文地质环境地质研究所

	Multivariate analysis of the heterogeneous geochemical processes controlling arsenic enrichment in a shallow groundwater system
	Huang, Shuangbing 5; Liu, Changrong ; Wang, Yanxin 1,2; Zhan, Hongbin 3
刊名	JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING
	2014
卷号	49 期号:4 页码:478-489
关键词	Arsenic enrichment geochemical processes heterogeneous statistical models
ISSN号	1093-4529
DOI	10.1080/10934529.2014.854689
英文摘要	The effects of various geochemical processes on arsenic enrichment in a high-arsenic aquifer at Jianghan Plain in Central China were investigated using multivariate models developed from combined adaptive neuro-fuzzy inference system (ANFIS) and multiple linear regression (MLR). The results indicated that the optimum variable group for the AFNIS model consisted of bicarbonate, ammonium, phosphorus, iron, manganese, fluorescence index, pH, and siderite saturation. These data suggest that reductive dissolution of iron/manganese oxides, phosphate-competitive adsorption, pH-dependent desorption, and siderite precipitation could integrally affect arsenic concentration. Analysis of the MLR models indicated that reductive dissolution of iron(III) was primarily responsible for arsenic mobilization in groundwaters with low arsenic concentration. By contrast, for groundwaters with high arsenic concentration (i.e., > 170g/L), reductive dissolution of iron oxides approached a dynamic equilibrium. The desorption effects from phosphate-competitive adsorption and the increase in pH exhibited arsenic enrichment superior to that caused by iron(III) reductive dissolution as the groundwater chemistry evolved. The inhibition effect of siderite precipitation on arsenic mobilization was expected to exist in groundwater that was highly saturated with siderite. The results suggest an evolutionary dominance of specific geochemical process over other factors controlling arsenic concentration, which presented a heterogeneous distribution in aquifers. Supplemental materials are available for this article. Go to the publisher's online edition of the Journal of Environmental Science and Health, Part A, to view the supplemental file.
学科主题	环境地质学
WOS关键词	DISSOLVED ORGANIC-MATTER ; SOUTHEAST-ASIA ; BANGLADESH ; AQUIFERS ; CONTAMINATION ; MOBILIZATION ; VARIABILITY ; BENGAL ; WATER
WOS研究方向	Engineering ; Environmental Sciences & Ecology
语种	英语
出版者	TAYLOR & FRANCIS INC
WOS记录号	WOS:000328533900012
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/41561]
专题	中国地质科学院水文地质环境地质研究所
作者单位	1.Chinese Acad Geol Sci, Inst Hydrogeol & Environm Geol, Shijiazhuang 050061, Peoples R China 2.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Hubei, Peoples R China 3.China Univ Geosci, Sch Environm Studies, Wuhan 430074, Hubei, Peoples R China 4.Texas A&M Univ, Dept Geol & Geophys, College Stn, TX USA 5.中国地质科学院水文地质环境地质研究所
推荐引用方式 GB/T 7714	Huang, Shuangbing,Liu, Changrong,Wang, Yanxin,et al. Multivariate analysis of the heterogeneous geochemical processes controlling arsenic enrichment in a shallow groundwater system[J]. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING,2014,49(4):478-489.
APA	Huang, Shuangbing,Liu, Changrong,Wang, Yanxin,&Zhan, Hongbin.(2014).Multivariate analysis of the heterogeneous geochemical processes controlling arsenic enrichment in a shallow groundwater system.JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING,49(4),478-489.
MLA	Huang, Shuangbing,et al."Multivariate analysis of the heterogeneous geochemical processes controlling arsenic enrichment in a shallow groundwater system".JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 49.4(2014):478-489.