- Title
- Geographical variation and age-related dietary exposure to arsenic in rice from Bangladesh
- Creator
- Islam, Shofiqul; Rahman, Mohammad Mahmudur; Islam, M. R.; Naidu, Ravi
- Relation
- Science of the Total Environment Vol. 601-602, Issue 1 December 2017, p. 122-131
- Publisher Link
- http://dx.doi.org/10.1016/j.scitotenv.2017.05.184
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2017
- Description
- An extensive number (965) of rice samples collected by household survey from 73 upazilas (i.e. sub-districts) in Bangladesh was analyzed to determine regional variation, distribution and associated health risks from arsenic (As). No previous study had conducted a study examining such a large number of rice samples. The mean and median concentrations of total As were 126 µg/kg and 107 µg/kg, respectively, ranging from between 3 and 680 µg/kg. Importantly, total As levels of aromatic rice were significantly lower (average 58 µg/kg) than non-aromatic rice (average 150 µg/kg) and also varied with rice grain size. The variation in As content was dominated by the location (47% among the upazilas, 71% among districts) and rice variety (14%). Inorganic As content in rice grain ranged between 11 and 502 µg/kg (n = 162) with the highest fraction being 98.6%. The daily intake of inorganic As from rice ranged between 0.38 and 1.92 µg/kg BW in different districts. The incremental lifetime cancer risk (ILCR) for individuals due to the consumption of rice varied between 0.57 × 10-3 to 2.88 × 10-3 in different districts, and 0.54 × 10-3 to 2.12 × 10 -3 in different varieties, higher than the US EPA thresho ld. The 2-10 age group experiences higher carcinogenic risks than others and females are more susceptible than males.
- Subject
- arsenic; rice; risk assessment; human health risk; hazard quotient; incremental lifetime cancer risk
- Identifier
- http://hdl.handle.net/1959.13/1351488
- Identifier
- uon:30718
- Identifier
- ISSN:0048-9697
- Language
- eng
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