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Assessment of hydrogeochemical characteristics and quality of groundwater resources in relation to risk of gastric cancer: comparative analysis of high- and low-risk areas in Iran

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Abstract

The chemical quality of groundwater supplies in two high-risk area (HRA) and low-risk area (LRA) for gastric cancer in Iran was assessed through hydrogeochemical analysis and water quality indices. For this aim, Piper and Schoeller diagrams and water quality index (WQI) were applied. In addition, exposure to nitrate via drinking water and its corresponding risk were also assessed using Monte Carlo simulation technique. Data on physicochemical properties of groundwater resources were obtained from Iran Water Resources Management Company. Sampling and analysis of tap water for nitrate concentration were conducted in two cities of Shiraz (as a representative of LRA) and Ardabil (as a representative of HRA). According to Piper diagrams, the dominant hydrogeochemical facies of groundwater supplies in HRA and LRA were Na–HCO3 (43.75%) and Ca–HCO3 (41.77%), respectively. The predominant cations in groundwater resources of HRA were found to be Na+ (68.06%) and Ca2+ (31.94%). For LRA, the typical cations were in decreasing trend: Ca2+ (39.64%) > Mg2+ (18.35%) > Na+ (17.26%). For two areas, HCO3−, SO42− and Cl− were, respectively, the most frequent anions. Two-sample Wilcoxon test showed that there were statistically significant difference between two areas in terms of anions and cations concentrations (p value < 0.05). The mean of total hardness (Ca2+ + Mg2+) concentration of water supplies in LRA (528.1 mg/L) was higher than HRA (263.1 mg/L), whereas the mean of Na+ concentration was found to be lower in LRA (90.6 mg/L) compared with HRA (108.1 mg/L). The sum of nitrate intake and its risk in LRA was higher than HRA. WQI results showed that drinking water quality in HRA and LRA ranged from excellent to poor and most water resources were of a good quality class. Further studies are suggested to investigate the role of drinking water in the etiology of gastric cancer in Iran.

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Acknowledgements

This study was conducted as part of Ph.D. thesis of first author at Tehran University of Medical Sciences, Iran. It was supported by the Institute for Environmental Research (IER), Tehran University of Medical Sciences. The authors thank Iran Water Resources Management Company (IWRMC) for providing some water quality data.

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Authors and Affiliations

  1. Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran

    Hamid Reza Ghaffari, Masud Yunesian, Ramin Nabizadeh & Simin Nasseri

  2. Center for Air Pollution Research and Department of Research Methodology and Data Analysis, Institute for Environmental Research (IER), Tehran University of Medical Sciences, Tehran, Iran

    Masud Yunesian & Ramin Nabizadeh

  3. Center for Water Quality Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran

    Simin Nasseri

  4. Digestive Diseases Research Center, Ardabil University of Medical Sciences, Ardabil, Iran

    Farhad Pourfarzi

  5. Digestive Oncology Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran

    Hossein Poustchi & Alireza Sadjadi

  6. Avicenna Center for Medicine and Organ Transplant, Avicenna Hospital, Shiraz, Iran

    Ahad Eshraghian

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  1. Hamid Reza Ghaffari
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Ghaffari, H.R., Yunesian, M., Nabizadeh, R. et al. Assessment of hydrogeochemical characteristics and quality of groundwater resources in relation to risk of gastric cancer: comparative analysis of high- and low-risk areas in Iran. Environ Geochem Health 43, 1–21 (2021). https://doi.org/10.1007/s10653-020-00562-x

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