Fenton reagent reduces the level of arsenic in paddy rice grain

Qin, J, Li, Y, Feng, M, Li, H and Lin, C 2017, 'Fenton reagent reduces the level of arsenic in paddy rice grain' , Geoderma, 307 , pp. 73-80.

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Abstract

Hydroponic and pot experiments were conducted to examine the effects of Fenton reagent on paddy rice plant growing in arsenic-contaminated soils. Fenton reagent significantly reduced arsenic phytotoxicity, uptake by the plants and accumulation in rice grain. This is attributed to oxidation of As3+ to As5+ by hydroxyl radicals and immobilization of arsenate by reacting with precipitating Fe3+ to form practically insoluble compounds. Although this process enhanced the formation of Fe-enriched coatings on root surface, it appears that root plaque had limited effects on inhibiting As uptake since most of the young roots were not covered by iron plaque. It is more likely that As immobilization in the bulk soils play a major role in reducing As flux towards rhizosphere. The findings have implications for understanding As behavior in paddy field receiving rainwater-borne hydrogen peroxide and developing cost-effective techniques for reducing As level in rice grain produced from As-contaminated soils

Item Type: Article
Schools: Schools > School of Environment and Life Sciences > Ecosystems and Environment Research Centre
Journal or Publication Title: Geoderma
Publisher: Elsevier
ISSN: 0016-7061
Related URLs:
Funders: Natural Science Foundation of China
Depositing User: C Lin
Date Deposited: 31 Jul 2017 13:09
Last Modified: 17 Oct 2017 21:16
URI: http://usir.salford.ac.uk/id/eprint/43376

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