Organo-arsenic complexation studies explaining the reduction of uptake of arsenic in wheat grown with contaminated irrigation water and organic amendments

Kumar, SN, Mishra, BB, Kumar, S and Mandal, J ORCID: https://orcid.org/0000-0003-0814-0369 2021, 'Organo-arsenic complexation studies explaining the reduction of uptake of arsenic in wheat grown with contaminated irrigation water and organic amendments' , Water, Air, & Soil Pollution, 232 (3) , p. 118.

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Access Information: This is a post-peer-review, pre-copyedit version of an article published in Water, Air, & Soil Pollution. The final authenticated version is available online at: http://dx.doi.org/10.1007/s11270-021-05065-8

Abstract

Application of organics in soil can reduce uptake of arsenic (As) in food crops grown on soil spiked with As. However, the results may be different if the crop is grown with As-contaminated irrigation water. In this study, a modest initiative has been under- taken to assess the organo-arsenic equilibria using the fulvic and humic extracted from paddy husk (PH), vermicompost (VC), and soil. The fulvic and humic acids were found to be polyprotic in nature. Fulvic acid extracted from paddy husk have the highest mole ratio or combining ability of 1.88 ± 0.59 and stability con- stant (log K) of 8.96 ± 0.21. Based on the above find- ings, a greenhouse experiment with wheat crop was conducted using different concentrations of As in irri- gation water (1, 2, 4, and 8 mg L−1), irrigated 5 times throughout the crop growth period and 3 levels of amendments (No amendment, VC and PH @ 10 t ha−1 each). Paddy husk and also vermicompost can be effec- tively used as an amendment to trim down the bioavail- ability of arsenic in the wheat grain provided the As content in irrigation water is < 2 mg L−1. Risk assess- ment of As spiked soils was carried out and expressed in hazard quotient as per USEPA guideline. Solubility freeion activity model was also used to forecast the transfer of As from As spiked soil to wheat grain.

Item Type: Article
Schools: Schools > School of Environment and Life Sciences
Journal or Publication Title: Water, Air, & Soil Pollution
Publisher: Springer
ISSN: 0049-6979
Related URLs:
Funders: Science Engineering Research Board (SERB), Department of Science and Technology (DST)
Depositing User: Jajati Mandal
Date Deposited: 10 May 2021 09:27
Last Modified: 10 May 2021 09:30
URI: http://usir.salford.ac.uk/id/eprint/59984

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