Arsenic species in raw and cooked rice: implications for human health in rural Bengal

Halder, Dipti and Biswas, Ashis and Slejkovec, Zdenka and Chatterjee, Debashis and Nriagu, Jerome and Jacks, Gunnar and Bhattacharya, Prosun (2014) Arsenic species in raw and cooked rice: implications for human health in rural Bengal. Science of the Total Environment, 497-498. pp. 200-208. ISSN 0048-9697

Abstract

This study compares the concentrations of total and different species of arsenic (As) in 29 pairs of raw and cooked rice samples collected from households in an area of West Bengal affected by endemic arsenicism. The aim is to investigate the effects of indigenous cooking practice of the rural villagers on As accumulation and speciation in cooked rice. It is found that inorganic As is the predominant species in both raw (93.8%) and cooked rice (88.1%). Cooking of rice with water low in As (<10μgL-1) significantly decreases the total and inorganic As content in cooked rice compared to raw rice. Arsenic concentration is mainly decreased during boiling of rice grains with excess water. Washing of rice grains with low As water has negligible effect on grain As concentration. The study suggests that rice cooking with low As water by the villagers is a beneficial risk reduction strategy. Despite reductions in As content in cooked rice because of cooking with low As water, the consumption of cooked rice represents a significant health threat (in terms of chronic As toxicity) to the study population.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 15 May 2019 05:21
Last Modified: 30 May 2019 02:09
Uncontrolled Keywords: arsenic speciation; cooked rice; daily intake; health risk assessment; raw rice
Fields of Research : 05 Environmental Sciences > 0502 Environmental Science and Management > 050204 Environmental Impact Assessment
04 Earth Sciences > 0406 Physical Geography and Environmental Geoscience > 040603 Hydrogeology
05 Environmental Sciences > 0502 Environmental Science and Management > 050206 Environmental Monitoring
Identification Number or DOI: 10.1016/j.scitotenv.2014.07.075
URI: http://eprints.usq.edu.au/id/eprint/36024

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