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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| Format: | Article |
| Language: | English |
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Mahidol University
2022-01-01
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| Series: | Environment and Natural Resources Journal |
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| Online Access: | https://ph02.tci-thaijo.org/index.php/ennrj/article/view/245611/166474 |
| _version_ | 1811238318170439680 |
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| author | Apichaya Duangthong Seelawut Damrongsiri |
| author_facet | Apichaya Duangthong Seelawut Damrongsiri |
| author_sort | Apichaya Duangthong |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-04-12T12:39:41Z |
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| id | doaj.art-a5067e6bd030418b96f41eae2f0260cb |
| institution | Directory Open Access Journal |
| issn | 1686-5456 2408-2384 |
| language | English |
| last_indexed | 2024-04-12T12:39:41Z |
| publishDate | 2022-01-01 |
| publisher | Mahidol University |
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| series | Environment and Natural Resources Journal |
| spelling | doaj.art-a5067e6bd030418b96f41eae2f0260cb2022-12-22T03:32:49ZengMahidol UniversityEnvironment and Natural Resources Journal1686-54562408-23842022-01-01201899510.32526/ennrj/20/202100150Alteration of Fractionation and Bioavailability of Arsenic (As) in Paddy Soil under Transition from Aerobic to Anaerobic ConditionsApichaya Duangthong0Seelawut Damrongsiri1Environmental Research Institute (ERIC), Chulalongkorn University, Bangkok 10330, ThailandEnvironmental Research Institute (ERIC), Chulalongkorn University, Bangkok 10330, ThailandThe 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.https://ph02.tci-thaijo.org/index.php/ennrj/article/view/245611/166474arsenicpaddy soilfractionationbioavailabilityanaerobic |
| spellingShingle | Apichaya Duangthong Seelawut Damrongsiri Alteration of Fractionation and Bioavailability of Arsenic (As) in Paddy Soil under Transition from Aerobic to Anaerobic Conditions Environment and Natural Resources Journal arsenic paddy soil fractionation bioavailability anaerobic |
| title | 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_short | 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 |
| topic | arsenic paddy soil fractionation bioavailability anaerobic |
| url | https://ph02.tci-thaijo.org/index.php/ennrj/article/view/245611/166474 |
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