Mitigation of arsenic accumulation in rice: an agronomical, physico-chemical, and biological approach – a critical review

Kumarathilaka, Prasanna and Seneweera, Saman and Ok, Yong Sik and Meharg, Andrew A. and Bundschuh, Jochen (2019) Mitigation of arsenic accumulation in rice: an agronomical, physico-chemical, and biological approach – a critical review. Critical Reviews in Environmental Science and Technology. pp. 1-41. ISSN 1064-3389


Human exposure to As through rice consumption is a worldwide health concern. There is an urgent need to either remediate As contaminated paddy soils, or to screen for low As accumulating rice varieties, thereby limiting the build up of As in their grains. This review presents a number of agronomic,physico-chemical, and biological approaches that may reduce the As content in paddy agroecosystems. Studies have shown that alternative water management practices significantly reduce As accumulation in rice grains. The application of Si sources into As contaminated paddy soils may limit As(III) uptake. The supplementation of redox-sensitive elements (i.e. Fe and Mn) and the incorporation of biochar (BC) may also immobilize As in the paddy environment. Inoculation of microorganisms is another in-situ method to reduce As in rice grains. Accumulation of As in rice grains can also be largely reduced through altering the expression of genes in rice plants. However, applicability of potential As mitigation approaches is dependent on the biogeochemical properties of the paddy agroecosystems, water management practices, availability of sources, and cost. This article expands on research gaps and provides future research directions to enable the production of safer rice grains with reduced As accumulation.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published online: 22 Jun 2019. Permanent restricted access to ArticleFirst version, in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying
Date Deposited: 01 Jul 2019 01:53
Last Modified: 06 Sep 2019 01:37
Uncontrolled Keywords: arsenic methylation; biochar; microorganisms; rice; soil amendments; water management
Fields of Research : 07 Agricultural and Veterinary Sciences > 0701 Agriculture, Land and Farm Management > 070108 Sustainable Agricultural Development
05 Environmental Sciences > 0503 Soil Sciences > 050304 Soil Chemistry (excl. Carbon Sequestration Science)
09 Engineering > 0907 Environmental Engineering > 090703 Environmental Technologies
05 Environmental Sciences > 0502 Environmental Science and Management > 050205 Environmental Management
09 Engineering > 0907 Environmental Engineering > 090799 Environmental Engineering not elsewhere classified
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970105 Expanding Knowledge in the Environmental Sciences
E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
D Environment > 96 Environment > 9612 Rehabilitation of Degraded Environments > 961202 Rehabilitation of Degraded Farmland, Arable Cropland and Permanent Cropland Environments
C Society > 92 Health > 9205 Specific Population Health (excl. Indigenous Health) > 920599 Specific Population Health (excl. Indigenous Health) not elsewhere classified
B Economic Development > 82 Plant Production and Plant Primary Products > 8204 Summer Grains and Oilseeds > 820402 Rice
C Society > 92 Health > 9204 Public Health (excl. Specific Population Health) > 920405 Environmental Health
Identification Number or DOI: 10.1080/10643389.2019.1618691

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