Arid
DOI10.1016/j.scitotenv.2012.04.048
Arsenic and associated trace-elements in groundwater from the Chaco-Pampean plain, Argentina: Results from 100 years of research
Nicolli, Hugo B.1,2; Bundschuh, Jochen3,4; Blanco, Maria del C.5; Tujchneider, Ofelia C.2,6; Panarello, Hector O.2,7; Dapena, Cristina7; Rusansky, Jorge E.1
通讯作者Nicolli, Hugo B.
来源期刊SCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
EISSN1879-1026
出版年2012
卷号429页码:36-56
英文摘要

The Chaco-Pampean plain, Argentina, is a vast geographical unit (1,000,000 km(2)) affected by high arsenic (As) concentrations in universal oxidizing groundwater. The socio-economic development of the region is restricted by water availability and its low quality caused by high salinity and hardness. In addition, high As and associated trace-elements (F, U, V. B, Se, Sb, Mo) concentrations of geogenic origin turn waters unsuitable for human consumption. Shallow groundwater with high As and F concentrations (ranges: <10-5300 mu g As/L; 51-7,340 mu g F/L) exceeding the WHO guideline values (As: 10 mu g/L; F: 1,500 mu g/L) introduces a potential risk of hydroarsenicism disease in the entire region and fluorosis in some areas. The rural population is affected (2-8 million inhabitants). Calcareous loess-type sediments and/or intercalated volcanic ash layers in pedosedimentary sequences hosting the aquifers are the sources of contaminant trace-elements. Large intra and interbasin variabilities of trace-element concentrations, especially between shallow and deep aquifers have been observed. All areas of the Chaco-Pampean plain were affected in different grades: the Chaco-Saltena plain (in the NNE of the region) and the northern La Pampa plain (in the center-south) have been shown the highest concentrations. The ranges of As and F contents in loess-sediments are 6-25 and 534-3340 mg/kg, respectively in the Sali River basin. Three key processes render high As concentrations in shallow aquifers: i) volcanic glass dissolution and/or hydrolysis and leaching of silicates minerals hosted in loess; ii) desorption processes from the surface of Al-, Fe- and Mn-oxi-hydroxides (coating lithic fragments) at high pH and mobilization as complex oxyanions (As and trace elements)in Na-bicarbonate type groundwaters; and iii) evaporative concentration in areas with semiarid and arid climates. Local factors play also an important role in the control of high As concentrations, highly influenced by lithology-mineralogy, soils-geomorphology, actual climate and paleoclimates, hydraulic parameters, and residence time of groundwaters. (C) 2012 Published by Elsevier B.V.


英文关键词Hydrogeochemistry Trace-element sources and mobility Arsenic Fluoride Chaco-Pampean aquifers Endemic hydroarsenicism and fluorosis
类型Review
语种英语
国家Argentina ; Australia ; Sweden
收录类别SCI-E
WOS记录号WOS:000307085100003
WOS关键词BLADDER-CANCER ; DRINKING-WATER ; LA PAMPA ; CONTAMINATION ; ADSORPTION ; SEDIMENTS ; MOBILITY ; AQUIFERS ; BEHAVIOR ; PROVINCE
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/2XILL650/174967
作者单位1.Inst Geoquim INGEOQUI, San Miguel De Tucuman, Buenos Aires, Argentina;
2.Consejo Nacl Invest Cient & Tecn CONICET, Buenos Aires, DF, Argentina;
3.Univ So Queensland, Fac Engn & Surveying, Toowoomba, Qld 4350, Australia;
4.Royal Inst Technol KTH, Dept Land & Water Resources Engn, KTH Int Groundwater Arsen Res Grp, Stockholm, Sweden;
5.Univ Nacl Sur, Dept Agron, RA-8000 Bahia Blanca, Buenos Aires, Argentina;
6.Univ Nacl Litoral, FICH, Santa Fe, Argentina;
7.Inst Geocronol & Geol Isotop INGEIS, Buenos Aires, DF, Argentina
推荐引用方式
GB/T 7714
Nicolli, Hugo B.,Bundschuh, Jochen,Blanco, Maria del C.,et al. Arsenic and associated trace-elements in groundwater from the Chaco-Pampean plain, Argentina: Results from 100 years of research[J],2012,429:36-56.
APA Nicolli, Hugo B..,Bundschuh, Jochen.,Blanco, Maria del C..,Tujchneider, Ofelia C..,Panarello, Hector O..,...&Rusansky, Jorge E..(2012).Arsenic and associated trace-elements in groundwater from the Chaco-Pampean plain, Argentina: Results from 100 years of research.SCIENCE OF THE TOTAL ENVIRONMENT,429,36-56.
MLA Nicolli, Hugo B.,et al."Arsenic and associated trace-elements in groundwater from the Chaco-Pampean plain, Argentina: Results from 100 years of research".SCIENCE OF THE TOTAL ENVIRONMENT 429(2012):36-56.
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