تعهد نامه
نوع مقاله : مقالات پژوهشی
عنوان مقاله English
نویسندگان English
Background and Objective: Heavy metals enter water supply sources through various processes and, by entering the food chain and accumulating in tissues, can cause adverse health effects on humans. Therefore, this study aimed to determine the concentration of heavy metals in drinking water sources in Azadshahr city and assess the carcinogenic and non-carcinogenic health risks of the studied metals in this region.
Material and Methods: This descriptive-cross-sectional study used instantaneous sampling from 10 water sources. The concentrations of heavy metals (arsenic, lead, cadmium, chromium, zinc, nickel, and copper) were measured using standard methods by atomic absorption spectrometry (ICP-MS). The human health risk assessment followed U.S. EPA-approved procedures. Environmental Protection Agency (EPA).
Results: The results showed that the average concentrations of heavy metals (nickel, zinc, copper, lead, chromium, cadmium, and arsenic) were 0.576, 0.487, 0.811, 0.118, 23.29, 0.014, and 3.466µg/L, respectively. Based on this, the highest and lowest average concentrations of heavy metals were related to chromium and cadmium, respectively. The results of the carcinogenic health risk assessment for all metals in adults and children were within the high-risk range. The hazard index (HI) for non-carcinogenic effects in adults was within the low-risk range for all sources, while for children, seven sources were in the low-risk range, and three sources were in the moderate non-carcinogenic risk range.
Conclusion: In this study, the levels of arsenic and chromium metals were below the standard limit, but due to their high carcinogenic potential, the health risk assessment indicated a carcinogenic risk for both arsenic and chromium in both adult and children age groups. Therefore, we recommend regulatory units prioritize continuous heavy metal monitoring.
Open Access Policy: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/
کلیدواژهها English