Alteration of Fractionation and Bioavailability of Arsenic (As) in Paddy Soil under Transition from Aerobic to Anaerobic Conditions

The impact of the change from aerobic to anaerobic immersed soil conditions on arsenic (As) fractionation (Tessier’s method) and its bioavailability (ethylene diamine tetraacetic acid extractable) were assessed. As-contaminated paddy soils were tested by laboratory simulation experiments. The sample...

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Autores principales:	Apichaya Duangthong, Seelawut Damrongsiri
Formato:	article
Lenguaje:	EN
Publicado:	Mahidol University 2021
Materias:	arsenic paddy soil fractionation bioavailability anaerobic Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/a5067e6bd030418b96f41eae2f0260cb
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spelling	oai:doaj.org-article:a5067e6bd030418b96f41eae2f0260cb2021-12-03T06:49:23ZAlteration of Fractionation and Bioavailability of Arsenic (As) in Paddy Soil under Transition from Aerobic to Anaerobic Conditions10.32526/ennrj/20/2021001501686-54562408-2384https://doaj.org/article/a5067e6bd030418b96f41eae2f0260cb2021-11-01T00:00:00Zhttps://ph02.tci-thaijo.org/index.php/ennrj/article/view/245611/166474https://doaj.org/toc/1686-5456https://doaj.org/toc/2408-2384The impact of the change from aerobic to anaerobic immersed soil conditions on arsenic (As) fractionation (Tessier’s method) and its bioavailability (ethylene diamine tetraacetic acid extractable) were assessed. As-contaminated paddy soils were tested by laboratory simulation experiments. The samples were aerobic, with 35-49 mg/kg of As at low bioavailability (<2%). Most As was distributed in the stable fraction (77%), followed by As bound to ferric and manganese oxide (17%) and organic compounds (5%), while the mobile fraction (exchangeable and mildly acid-soluble) was limited (1%). After one month under anaerobic simulation, redox potential reduced to less than zero (-32 to -124 mV). The stable fraction of As decreased (-17%), while the mobile fraction increased (+16%) and As bioavailability also increased (+26% total As). Increase in the As mobile fraction was associated with freshly precipitated compounds. The As content in the soil altered from a stable fraction to an available fraction when confined in an anaerobic environment for a long period. Results indicated that agricultural methods which promoted anaerobic conditions in As-contaminated soil should be avoided.Apichaya DuangthongSeelawut DamrongsiriMahidol Universityarticlearsenicpaddy soilfractionationbioavailabilityanaerobicEnvironmental technology. Sanitary engineeringTD1-1066Environmental sciencesGE1-350ENEnvironment and Natural Resources Journal, Vol 20, Iss 1, Pp 89-95 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	arsenic paddy soil fractionation bioavailability anaerobic Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
spellingShingle	arsenic paddy soil fractionation bioavailability anaerobic Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Apichaya Duangthong Seelawut Damrongsiri Alteration of Fractionation and Bioavailability of Arsenic (As) in Paddy Soil under Transition from Aerobic to Anaerobic Conditions
description	The impact of the change from aerobic to anaerobic immersed soil conditions on arsenic (As) fractionation (Tessier’s method) and its bioavailability (ethylene diamine tetraacetic acid extractable) were assessed. As-contaminated paddy soils were tested by laboratory simulation experiments. The samples were aerobic, with 35-49 mg/kg of As at low bioavailability (<2%). Most As was distributed in the stable fraction (77%), followed by As bound to ferric and manganese oxide (17%) and organic compounds (5%), while the mobile fraction (exchangeable and mildly acid-soluble) was limited (1%). After one month under anaerobic simulation, redox potential reduced to less than zero (-32 to -124 mV). The stable fraction of As decreased (-17%), while the mobile fraction increased (+16%) and As bioavailability also increased (+26% total As). Increase in the As mobile fraction was associated with freshly precipitated compounds. The As content in the soil altered from a stable fraction to an available fraction when confined in an anaerobic environment for a long period. Results indicated that agricultural methods which promoted anaerobic conditions in As-contaminated soil should be avoided.
format	article
author	Apichaya Duangthong Seelawut Damrongsiri
author_facet	Apichaya Duangthong Seelawut Damrongsiri
author_sort	Apichaya Duangthong
title	Alteration of Fractionation and Bioavailability of Arsenic (As) in Paddy Soil under Transition from Aerobic to Anaerobic Conditions
title_short	Alteration of Fractionation and Bioavailability of Arsenic (As) in Paddy Soil under Transition from Aerobic to Anaerobic Conditions
title_full	Alteration of Fractionation and Bioavailability of Arsenic (As) in Paddy Soil under Transition from Aerobic to Anaerobic Conditions
title_fullStr	Alteration of Fractionation and Bioavailability of Arsenic (As) in Paddy Soil under Transition from Aerobic to Anaerobic Conditions
title_full_unstemmed	Alteration of Fractionation and Bioavailability of Arsenic (As) in Paddy Soil under Transition from Aerobic to Anaerobic Conditions
title_sort	alteration of fractionation and bioavailability of arsenic (as) in paddy soil under transition from aerobic to anaerobic conditions
publisher	Mahidol University
publishDate	2021
url	https://doaj.org/article/a5067e6bd030418b96f41eae2f0260cb
work_keys_str_mv	AT apichayaduangthong alterationoffractionationandbioavailabilityofarsenicasinpaddysoilundertransitionfromaerobictoanaerobicconditions AT seelawutdamrongsiri alterationoffractionationandbioavailabilityofarsenicasinpaddysoilundertransitionfromaerobictoanaerobicconditions
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Alteration of Fractionation and Bioavailability of Arsenic (As) in Paddy Soil under Transition from Aerobic to Anaerobic Conditions

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