干旱区生态环境知识资源中心(Arid): Origin and geochemistry of arsenic in surface and groundwaters of Los Pozuelos basin, Puna region, Central Andes, Argentina

Arid

DOI	10.1016/j.scitotenv.2019.134085
	Origin and geochemistry of arsenic in surface and groundwaters of Los Pozuelos basin, Puna region, Central Andes, Argentina
	Murray, Jesica 1,2; Nordstrom, D. Kirk 3; Dold, Bernhard 4; Romero Orue, Maria 1; Kirschbaum, Alicia 1
通讯作者	Murray, Jesica
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2019
卷号	697
英文摘要	Los Pozuelos is a closed basin in the Puna region of NW Argentina, Central Andes. This is a semi-arid region where closed basins are the most important feature for the hydrologic systems. The center of the basin is occupied by a fluctuating playa lake called Los Pozuelos lagoon, which constitutes a UNESCO Biosphere Reserve. This is one of the most populated closed basins in the Argentinian Puna and residents use groundwater for drinking and cooking. Lowest concentrations of As and dissolved solids are in the headwaters of the rivers (1.46-27 mu g/L) and the highest concentrations are in the lagoon (43.7-200.3 mu g/L). In groundwater, arsenic concentrations increase from the outer ring aquifer (3.82-29.7 mu g/L) composed of alluvial-alluvial fan sediments to the inner lacustrine aquifer (10-113 mu g/L) that surround the playa lake. Moreover, high concentrations of As during the dry season (90.2 and 113 mu g/L), Na/K mass ratios (0.2 and 0.3), and formation of Na-rich efflorescent salts suggest that high evaporation rates increases As concentration, while rainwater dilutes the concentration during the wet season. As(V) is the dominant species in all the water types, except for the lagoon, where As(III) occasionally dominates because of organic matter buildup. There are at least three potential sources for As in water i) oxidation of As sulfides in Pan de Azucar mine wastes, and acid mine drainage discharging into the basin; ii) weathering and erosion of mineralized shales; iii) weathering of volcanic eruptive non-mineralized rocks. Because it is a closed basin, the arsenic released from the natural and anthropogenic sources is transported in solution and in fluvial sediments and finally accumulates in the center of the basin where the concentration in water increases by evaporation with occasional enhancement by organic matter interaction in the lagoon. (C) 2019 Elsevier B.V. All rights reserved.
英文关键词	Altiplano-Puna Closed basin Arsenic redox speciation Evaporation UNESCO Biosphere Reserve
类型	Article
语种	英语
国家	Argentina ; France ; USA ; Sweden
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000499668600068
WOS关键词	TRACE-ELEMENTS ; BIOSPHERE RESERVE ; DRINKING-WATER ; MINE DRAINAGE ; LAKE BASIN ; ALTIPLANO ; EXPOSURE ; GOLD ; QUATERNARY ; RINCONADA
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
EI主题词	2019-12-20
来源机构	United States Geological Survey
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/311877
作者单位	1.Univ Nacl Salta, CONICET, Inst Bio & Geo Ciendas Noroeste Argentino, RA-4405 Rosario De Lerma, Argentina; 2.Univ Strasbourg, EOST, CNRS, Lab Hydrol & Geochim Strasbourg, F-67084 Strasbourg, France; 3.US Geol Survey, Boulder, CO 80303 USA; 4.Lulea Univ Technol, Div Geosci & Environm Engn, S-97187 Lulea, Sweden
推荐引用方式 GB/T 7714	Murray, Jesica,Nordstrom, D. Kirk,Dold, Bernhard,et al. Origin and geochemistry of arsenic in surface and groundwaters of Los Pozuelos basin, Puna region, Central Andes, Argentina[J]. United States Geological Survey,2019,697.
APA	Murray, Jesica,Nordstrom, D. Kirk,Dold, Bernhard,Romero Orue, Maria,&Kirschbaum, Alicia.(2019).Origin and geochemistry of arsenic in surface and groundwaters of Los Pozuelos basin, Puna region, Central Andes, Argentina.SCIENCE OF THE TOTAL ENVIRONMENT,697.
MLA	Murray, Jesica,et al."Origin and geochemistry of arsenic in surface and groundwaters of Los Pozuelos basin, Puna region, Central Andes, Argentina".SCIENCE OF THE TOTAL ENVIRONMENT 697(2019).