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Geographical variation in total and inorganic arsenic content of polished (white) rice

Meharg, Andrew A and Williams, Paul N and Adomako, Eureka and Lawgali, Youssef Y and Deacon, Claire and Villada, Antia and Cambell, Robert C J and Sun, Guoxin and Zhu, Yong-Guan and Feldmann, Joerg and Raab, Andrea and Zhao, Fang-Jie and Islam, Rafiqul and Hossain, Shahid and Yanai, Junta (2009) Geographical variation in total and inorganic arsenic content of polished (white) rice. Environmental Science and Technology, 43 (5). pp. 1612-1617. ISSN 0013-936X

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Abstract

An extensive data set of total arsenic analysis for 901 polished (white) grain samples, originating from 10 countries from 4 continents, was compiled. The samples represented the baseline (i.e., notspecifically collected from arsenic contaminated areas), and all were for market sale in major conurbations. Median total arsenic contents of rice varied 7-fold, with Egypt (0.04 mg/kg) and India (0.07 mg/kg) having the lowest arsenic content while the U.S. (0.25 mg/kg) and France (0.28 mg/kg) had the highest content. Global distribution of total arsenic in rice was modeled by weighting each country's arsenic distribution by that country's contribution to global production. A subset of 63 samples from Bangladesh, China, India, Italy, and the U.S. was analyzed for arsenic species. The relationship between inorganic arsenic contentversus total arsenic contentsignificantly differed among countries, with Bangladesh and India having the steepest slope in linear regression, and the U.S. having the shallowest slope. Using country-specific rice consumption data, daily intake of inorganic arsenic was estimated and the associated internal cancer risk was calculated using the U.S. Environmental Protection Agency (EPA) cancer slope. Median excess internal cancer risks posed by inorganic arsenic ranged 30-fold for the 5 countries examined, being 0.7 per 10,000 for Italians to 22 per 10,000 for Bangladeshis, when a 60 kg person was considered.

Item Type: Article
Journal or Publication Title: Environmental Science and Technology
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 53851
Deposited By: ep_importer_pure
Deposited On: 27 Apr 2012 15:23
Refereed?: Yes
Published?: Published
Last Modified: 09 Apr 2014 23:23
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/53851

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