干旱区生态环境知识资源中心(Arid): Hydrogeochemical controls on arsenic mobility in an arid inland basin, Southeast of Iran: The role of alkaline conditions and salt water intrusion

Arid

DOI	10.1016/j.envpol.2019.03.082
	Hydrogeochemical controls on arsenic mobility in an arid inland basin, Southeast of Iran: The role of alkaline conditions and salt water intrusion
	Dehbandi, Reza 1,2; Abbasnejad, Ahmad 3; Karimi, Zohreh 3; Herath, Indika 4; Bundschuh, Jochen 5
通讯作者	Abbasnejad, Ahmad
来源期刊	ENVIRONMENTAL POLLUTION
ISSN	0269-7491
EISSN	1873-6424
出版年	2019
卷号	249 页码:910-922
英文摘要	Elevated inorganic arsenic concentrations in groundwater has become a major public and environmental health concern in different parts of the world. Currently, As-contaminated groundwater issue in many countries and regions is a major topic for publications at global level. However, there are many regions worldwide where the problem has still not been resolved or fully understood due to inadequate hydrogeochemical investigations. Hence, this study evaluates for the first time the hydrogeochemical behavior of the arid and previously unexplored inland basin of Sirjan Plain, south east (SE) Iran, in order to assess the controlling factors which influence arsenic (As) mobility and its distribution through groundwater resources. Total inorganic arsenic concentration was measured using inductive-coupled plasma optical emission spectrometry (ICP-OES). Arsenic content in groundwater of this region ranged between 2.4 and 545.8 mu g/L (mean value: 86.6 mu g/L) and 50% of the samples exceeded the World Health Organization (WHO) guideline value of 10 mu g/L in drinking water. Groundwater was mainly of Ma-Cl type and alkaline due to silicate weathering, ion exchange and evaporation in arid conditions. Elevated As concentrations were generally observed under weakly alkaline to alkaline conditions (pH > 7.4). Multivariate statistical analysis including cluster analysis and bi-plot grouped As with pH and HCO3 and demonstrated that the secondary minerals including oxyhydroxides of Fe are the main source of As in groundwater in this region. The desorption of As from these mineral phases occurs under alkaline conditions in oxidizing arid environments thereby leading to high levels of As in groundwater. Moreover, evaporation, ion exchange and saltwater intrusion were the secondary processes accelerating As release and its mobility in groundwater. Based on the results of this study, desorption of As from metal oxyhydroxides surfaces under alkaline conditions, evaporation and intrusion of As-rich saline water are considered to be the major factors causing As enrichment in arid inland basins such as those in southeast Iran. This study proposes the regular monitoring and proper groundwater management practices to mitigate high levels of arsenic in groundwater and related drinking water wells of Sirjan Plain. Crown Copyright (C) 2019 Published by Elsevier Ltd. All rights reserved.
英文关键词	Geogenic arsenic Sirjan Plain Desorption Evaporation Salt water intrusion
类型	Article
语种	英语
国家	Iran ; Australia
收录类别	SCI-E
WOS记录号	WOS:000471081300099
WOS关键词	SANANDAJ-SIRJAN ZONE ; CHACO-PAMPEAN PLAIN ; REDUCING BACTERIA ; LA PAMPA ; GROUNDWATER ; CONTAMINATION ; MOBILIZATION ; AQUIFERS ; IRON ; GEOCHEMISTRY
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215491
作者单位	1.Mazandaran Univ Med Sci, Fac Hlth, Dept Environm Hlth Engn, Sari, Iran; 2.Mazandaran Univ Med Sci, Hlth Sci Res Ctr, Sari, Iran; 3.Shahid Bahonar Univ Kerman, Fac Sci, Dept Geol, Kerman, Iran; 4.Univ Southern Queensland, Fac Hlth Engn & Sci, Sch Civil Engn & Surveying, Toowoomba, Qld 4350, Australia; 5.Univ Southern Queensland, Groundwater Arsen 2030 Agenda Sustainable Dev, West St, Toowoomba, Qld 4350, Australia
推荐引用方式 GB/T 7714	Dehbandi, Reza,Abbasnejad, Ahmad,Karimi, Zohreh,et al. Hydrogeochemical controls on arsenic mobility in an arid inland basin, Southeast of Iran: The role of alkaline conditions and salt water intrusion[J],2019,249:910-922.
APA	Dehbandi, Reza,Abbasnejad, Ahmad,Karimi, Zohreh,Herath, Indika,&Bundschuh, Jochen.(2019).Hydrogeochemical controls on arsenic mobility in an arid inland basin, Southeast of Iran: The role of alkaline conditions and salt water intrusion.ENVIRONMENTAL POLLUTION,249,910-922.
MLA	Dehbandi, Reza,et al."Hydrogeochemical controls on arsenic mobility in an arid inland basin, Southeast of Iran: The role of alkaline conditions and salt water intrusion".ENVIRONMENTAL POLLUTION 249(2019):910-922.