Co-occurrence, possible origin, and health-risk assessment of arsenic and fluoride in drinking water sources in Mexico: Geographical data visualization
Article
Article Title | Co-occurrence, possible origin, and health-risk assessment of arsenic and fluoride in drinking water sources in Mexico: Geographical data visualization |
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ERA Journal ID | 3551 |
Article Category | Article |
Authors | Alarcon-Herrera, Maria T. (Author), Martin-Alarcon, Daniel A. (Author), Gutierrez, Melida (Author), Reynoso-Cuevas, Lilian (Author), Martin-Dominguez, Alejandra (Author), Olmos-Marquez, Mario A. (Author) and Bundschuh, Jochen (Author) |
Journal Title | Science of the Total Environment |
Journal Citation | 698, pp. 1-8 |
Article Number | 134168 |
Number of Pages | 8 |
Year | 2020 |
Publisher | Elsevier |
Place of Publication | Netherlands |
ISSN | 0048-9697 |
1879-1026 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.scitotenv.2019.134168 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0048969719341452 |
Abstract | Arsenic and fluoride in drinking water present a significant challenge to public health worldwide. In this study, we analyze the results of one of the largest surveys of drinking water quality in Mexico: 14,058 samples from 3951 sites, collected between January and December 2017. We use these data to identify the distribution and possible origin of arsenic and fluoride in drinking water throughout the country, and to estimate the associated health burden. The highest concentrations appear in alluvial aquifers in arid northern Mexico, where high-silica volcanic rock likely releases both arsenic and fluoride to the groundwater. We find fluoride contamination to be significantly correlated with aridity (Pearson correlation = −0.45, p = 0.0105), and also find a significant difference in fluoride concentrations between arid and humid states (Welch's t-test, p = 0.004). We estimate population exposure by assigning to each town in Mexico the average concentration of any sampling sites within 5 km. Our results show that 56% of the Mexican population lives within 5 km of a sampling site, 3.05 million people are exposed to fluoride above the reference dosage of 0.06 mg/(kg ∗ day), 8.81 million people are exposed to arsenic above the limit of 10 μg/L, and an additional 13,070 lifetime cases of cancer are expected from this arsenic exposure alone. This burden of disease is concentrated in the arid states of north-central Mexico. |
Keywords | Arsenic; Fluoride; Drinking water contamination; Contaminant mapping |
ANZSRC Field of Research 2020 | 410402. Environmental assessment and monitoring |
410404. Environmental management | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Centre for Research in Advanced Materials, Mexico |
Missouri State University, United States | |
Mexican Institute of Water Technology, Mexico | |
Autonomous University of Chihuahua, Mexico | |
University of Southern Queensland | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q598z/co-occurrence-possible-origin-and-health-risk-assessment-of-arsenic-and-fluoride-in-drinking-water-sources-in-mexico-geographical-data-visualization
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