The origin of arsenic in waters and sediments from Papallacta Lake area in Ecuador

Cumbal, L. H. and Bundschuh, J. and Aguirre, V. and Murgueitio, E. and Tipan, I and Chavez, C. (2009) The origin of arsenic in waters and sediments from Papallacta Lake area in Ecuador. In: Natural arsenic in groundwaters of Latin America. Arsenic in the Environment, 1. Taylor & Francis (CRC Press), London, United Kingdom, pp. 81-90. ISBN 9780415407717

Abstract

This chapter focuses on characterizing sources of arsenic (As) in the vicinity of Papallacta lake, Ecuador. Some of these sources are geothermal water discharges. Arsenic concentrations in these geothermal waters range from 1090 to 7853 μg/l and temperatures range from 13.8 to 63.0◦C. Arsenic concentrations were determined in water and sediment from the Tambo river, the main tributary of Papallacta lake. Arsenic concentrations are greater than 62 μg/l in water and up to 128 mg/kg in sediments. In comparison, total As concentrations in the shallow lake
water during the dry season range from 220 to 369 μg/l. At depth, the As distribution was nearly homogeneous and fluctuated between 289 and 351 μg/l. Analyses of the lake sediments indicate that As concentrations vary between 60 and 613 mg/kg. From this study, it can be concluded that
discharges of geothermal waters to the Tambo river are the main natural sources of As in Papallacta lake.


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Item Type: Book Chapter (Commonwealth Reporting Category B)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to published version due to publisher copyright policy.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 05 Nov 2014 04:39
Last Modified: 12 Sep 2016 00:58
Uncontrolled Keywords: arsenic; water; sediments; Papallacta Lake
Fields of Research : 05 Environmental Sciences > 0502 Environmental Science and Management > 050204 Environmental Impact Assessment
04 Earth Sciences > 0406 Physical Geography and Environmental Geoscience > 040603 Hydrogeology
URI: http://eprints.usq.edu.au/id/eprint/26263

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