Rasheed, H orcid.org/0000-0003-2983-6867, Kay, P, Slack, R et al. (2 more authors) (2017) Human exposure assessment of different arsenic species in household water sources in a high risk arsenic area. Science of the Total Environment, 584/5. pp. 631-641. ISSN 0048-9697
Abstract
Understanding arsenic speciation in water is important for managing the potential health risks associated with chronic arsenic exposure. Most arsenic monitoring studies to date have only measured total arsenic, with few looking at arsenic species. This study assessed 228 ground water sources in six unstudied villages in Pakistan for total, inorganic and organic arsenic species using ion chromatography inductively coupled plasma collision reaction cell mass spectrometry. The concentration levels approached 3090 μg L−1 (95% CI, 130.31, 253.06) for total arsenic with a median of 57.55 µg L-1, 3430 μg L−1 (median=52) for arsenate (As+5) and 100 μg L−1 (median=0.37) for arsenite (As+3). Exceedance of the WHO provisional guideline value for arsenic in drinking water (10 μg L−1) occurred in 89% of water sources. Arsenic was present mainly as arsenate (As+5). Average daily intake of total arsenic for 398 residents living in the sampled houses was found up to 236.51 µg kg−1 day−1. This exposure estimate has indicated that 63% of rural residents exceeded the World Health Organization’s provisional tolerable daily intake (PTDI) of 2.1 µg kg−1 day−1 body weight. Average daily intake of As+5 was found to be 15.63 µg kg−1 day−1 (95% CI, 5.53, 25.73) for children ≤ 16 and 15.07 µg kg−1 day−1 (95% CI, 10.33, 18.02) for adults. A mean daily intake of 0.09 µg kg−1 day−1 was determined for As+3 for children and 0.26 µg kg−1 day−1 for adults. Organic arsenic species such as monomethylarsonic acid (MMA), dimethylarsinic acid (DMA) and Arsenobetaine (AsB) were found to be below their method detection limits (MDLs).
Metadata
Item Type: | Article |
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Authors/Creators: |
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Editors: |
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Copyright, Publisher and Additional Information: | © 2017 Elsevier B.V. All rights reserved. This is an author produced version of a paper published in Science of the Total Environment. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Arsenate; arsenite; monomethylarsonic acid (MMA), dimethylarsinic acid (DMA); arsenical pesticides; provisional tolerable daily intake (PTDI). |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Food Science and Nutrition (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 17 Jan 2017 10:05 |
Last Modified: | 26 Jan 2018 01:38 |
Published Version: | https://doi.org/10.1016/j.scitotenv.2017.01.089 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.scitotenv.2017.01.089 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:110614 |