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Assessment of arsenic status and distribution in Usangu agro-ecosystem-Tanzania.

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dc.contributor.author Mng'ong'o, Marco
dc.contributor.author Comber, Sean
dc.contributor.author Munishi, Linus K
dc.contributor.author Blake, William
dc.contributor.author Ndakidemi, Patrick A
dc.contributor.author Hutchinson, Thomas H
dc.date.accessioned 2021-06-14T07:26:16Z
dc.date.available 2021-06-14T07:26:16Z
dc.date.issued 2021-06-09
dc.identifier.uri https://doi.org/10.1016/j.jenvman.2021.113012
dc.identifier.uri https://dspace.nm-aist.ac.tz/handle/20.500.12479/1206
dc.description The research article published by Elsevier Ltd., 2021 en_US
dc.description.abstract This study was conducted to assess arsenic (As) status and distribution in Usangu agroecosystem-Tanzania, including three land use. About 198 soil samples were collected in ten irrigation schemes in three land uses. Total and bioavailable As were determined by acid digestion (Aqua regia (AQ)) and Mehlich 3 method (M3) to estimate status, distribution and bioavailability. Arsenic concentration were variable among land use and irrigation schemes where total arsenic ranged 567.74-2909.84 μg/kg and bioavailable As ranged 26.17-712.37 μg/kg. About 12-16% of total arsenic were available for plant uptake. Approximately 86.53% of studied agricultural soils had total As concentration above Tanzania maximum allowable limit. Bioavailable As were lower compared to total As and were within the acceptable threshold. Total arsenic concentration were variable among schemes and higher values were observed in schemes which are highly intensified and mechanized. Thus, this study provides essential site specific preliminary baseline information for As status and distribution in agricultural soils to initiate monitoring and management strategies for increased land productivity and environmental safety. en_US
dc.language.iso en en_US
dc.publisher Elsevier Ltd. en_US
dc.subject Arsenic en_US
dc.subject Health risk en_US
dc.subject Irrigation scheme en_US
dc.subject Paddy farming en_US
dc.subject Pollution risk en_US
dc.subject Usangu basin en_US
dc.title Assessment of arsenic status and distribution in Usangu agro-ecosystem-Tanzania. en_US
dc.type Article en_US


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