Abstract
The arsenic intake through drinking water and daily diets and the arsenic concentration in urine of the 84 regular individuals were estimated over the three consecutive years, where the arsenic concentrations of drinking/cooking water were decreased gradually over the years. Study on the same participants over the years minimized the physiological factor(s) controlling arsenic absorption and excretion. Median daily dietary arsenic intake was 164 µg in males and 134 µg in females in Year-I. Arsenic removal filters were supplied to the inhabitants for arsenic-safe water supply and arsenic concentration in drinking/cooking water decreased (p < 0.01) from 91 µg/L (Year-I) to 30 µg/L (Year-II) and 13 µg/L (Year-III). Daily dietary arsenic intake decreased insignificantly in the study Year-II and Year-III in case of males (132, 180 µg) and females (97, 106 µg). iAs intake through diet (male: 140, 121, 162 µg/day; female: 113, 92, 99 µg/day) and the iAs intake doses were higher than EFSA-designated benchmark dose lower confidence limit, even after using arsenic-safe drinking/cooking water. Urine arsenic concentration was estimated at > 50 µg/L irrespective of sex and study years, and was associated (p = 0.05) to dietary arsenic intake. Individuals with skin lesion had more arsenic concentration in urine (p < 0.01) than the participants without skin lesion. Even after using low arsenic-contaminated (< 10 µg/L) water, 41, 28 and 43% participants, respectively, in consecutive years, exceeded the EFSA-designated benchmark dose lower confidence limit. The use of arsenic-safe water in drinking/cooking is not the only safe way to be arsenic safe for the endemic population.
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Abbreviations
- iAs:
-
Inorganic arsenic
- EFSA:
-
European Food Safety Authority (EFSA)
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Acknowledgements
The first author thanks DST-SERB, Government of India for providing research grants as N-PDF for continuing research works. The present work was supported by a research grant funded by the World Bank under the National Agricultural Innovative Project “Arsenic in Food Chain: Cause, Effect and Mitigation” from the Indian Council of Agricultural Research (ICAR), Govt. of India (Ref. No. NAIP/C4/C1005, dated 12.6.2007). The authors express their thanks to Dr. K Bhattacharya, Mr. R. N. Guha Mazumder, Anath Pramanick, Gopal Modak, and Goutam Dutta for their help in the execution of this study. Special thanks are also due to all the patients and villagers for their participation and cooperation in this study. The contents of this article are the sole responsibility of the authors and do not necessarily represent the official views of the funding agencies. This scientific work is the responsibility of the researchers.
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Biswas, A., Das, A., Roychowdhury, T. et al. Low Arsenic Exposure Risk in Endemic Population, Cohort Study for Consecutive Years. Expo Health 10, 273–286 (2018). https://doi.org/10.1007/s12403-017-0260-z
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DOI: https://doi.org/10.1007/s12403-017-0260-z