干旱区生态环境知识资源中心(Arid): Hydrogeochemical controls on the mobility of arsenic, fluoride and other geogenic co-contaminants in the shallow aquifers of northeastern La Pampa Province in Argentina

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DOI	10.1016/j.scitotenv.2020.136671
	Hydrogeochemical controls on the mobility of arsenic, fluoride and other geogenic co-contaminants in the shallow aquifers of northeastern La Pampa Province in Argentina
	Alcaine, Anna Aullon 1; Schulz, Carlos 2; Bundschuh, Jochen 3,4; Jacks, Gunnar 1; Thunvik, Roger 1; Gustafsson, Jon-Petter 1; Morth, Carl-Magnus 5; Sracek, Ondra 6; Ahmad, Arslan 1,7; Bhattacharya, Prosun 1,3,4
通讯作者	Alcaine, Anna Aullon ; Bhattacharya, Prosun
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2020
卷号	715
英文摘要	Elevated Arsenic (As) and Fluoride (F) concentrations in groundwater have been studied in the shallow aquifers of northeastern of La Pampa province, in the Chaco-Pampean plain, Argentina. The source of As and co-contaminants is mainly geogenic, from the weathering of volcanic ash and loess (rhyolitic glass) that erupted from the Andean volcanic range. In this study we have assessed the groundwater quality in two semi-arid areas of La Pampa. We have also identified the spatial distribution of As and co-contaminants in groundwater and determined the major factors controlling the mobilization of As in the shallow aquifers. The groundwater samples were circum-neutral to alkaline (7.4 to 92), oxidizing (Eh similar to 0.24 V) and characterized by high salinity (EC = 456-11,400 mu S/cm) and Na+-HCO3- water types in recharge areas. Carbonate concretions (tosca) were abundant in the upper layers of the shallow aquifer. The concentration of total As (5.6 to 535 mu g/L) and F (0.5 to 14.2 mg/L) were heterogeneous and exceeded the recommended WHO Guidelines and the Argentine Standards for drinking water. The predominant As species were arsenate As(V) oxyanions, determined by thermodynamic calculations. Arsenic was positively correlated with bicarbonate (HCO3-), fluoride (F), boron (B) and vanadium (V), but negatively correlated with iron (Fe), aluminium (Al), and manganese (Mn), which were present in low concentrations. The highest amount of As in sediments was from the surface of the dry lake. The mechanisms for As mobilization are associated with multiple factors: geochemical reactions, hydrogeological characteristics of the local aquifer and climatic factors. Desorption of As(V) at high pH, and ion competition for adsorption sites are considered the principal mechanisms for As mobilization in the shallow aquifers. In addition, the long-term consumption of the groundwater could pose a threat for the health of the local community and low cost remediation techniques are required to improve the drinking water quality. (C) 2020 Published by Elsevier B.V.
英文关键词	Arsenic Fluoride Shallow groundwater La Pampa Loess sediments Volcanic ash
类型	Article
语种	英语
国家	Sweden ; Argentina ; Australia ; Czech Republic ; Netherlands
收录类别	SCI-E
WOS记录号	WOS:000518409900071
WOS关键词	TRACE-ELEMENTS ; ALLUVIAL AQUIFERS ; LATIN-AMERICA ; HUMAN HEALTH ; GROUNDWATER ; CONTAMINATION ; PLAIN ; BEHAVIOR ; BASIN ; BANGLADESH
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/2XILL650/315536
作者单位	1.KTH Int Groundwater Arsen Res Grp, Dept Sustainable Dev Environm Sci & Engn, Teknikringen 10B, SE-10044 Stockholm, Sweden; 2.Univ Nacl La Pampa UNLPam, Fac Ciencias Exactas & Nat, Av Uruguay 151,L6300, Santa Rosa, La Pampa, Argentina; 3.Univ Southern Queensland, UNESCO Chair Groundwater Arsen Agenda Sustainable, West St, Toowoomba, Qld 4350, Australia; 4.Univ Southern Queensland, Fac Hlth Engn & Sci, West St, Toowoomba, Qld 4350, Australia; 5.Stockholm Univ, Dept Geol & Geochem, Stockholm, Sweden; 6.Palacky Univ, Fac Sci, Dept Geol, 17 Listopadu 12, Olomouc 777146, Czech Republic; 7.KWR Water Cycle Res Inst, Groningenhaven 7, NL-3433 PE Nieuwegein, Netherlands
推荐引用方式 GB/T 7714	Alcaine, Anna Aullon,Schulz, Carlos,Bundschuh, Jochen,et al. Hydrogeochemical controls on the mobility of arsenic, fluoride and other geogenic co-contaminants in the shallow aquifers of northeastern La Pampa Province in Argentina[J],2020,715.
APA	Alcaine, Anna Aullon.,Schulz, Carlos.,Bundschuh, Jochen.,Jacks, Gunnar.,Thunvik, Roger.,...&Bhattacharya, Prosun.(2020).Hydrogeochemical controls on the mobility of arsenic, fluoride and other geogenic co-contaminants in the shallow aquifers of northeastern La Pampa Province in Argentina.SCIENCE OF THE TOTAL ENVIRONMENT,715.
MLA	Alcaine, Anna Aullon,et al."Hydrogeochemical controls on the mobility of arsenic, fluoride and other geogenic co-contaminants in the shallow aquifers of northeastern La Pampa Province in Argentina".SCIENCE OF THE TOTAL ENVIRONMENT 715(2020).