Quantification and health risk assessment of nitrate in southern districts of Tehran, Iran

IF 2.3 Q2 Environmental Science

Journal of Water Reuse and Desalination Pub Date : 2022-05-23 DOI:10.2166/wrd.2022.007

S. Kalteh, Farshad Hamidi, Mahdi Ahmadi Nasab, Narges Mohseni Gharibdoosti, Mohammad Rezvani Ghalhari, Mina Parvizishad, A. Mahvi

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引用次数: 1

Abstract

Nitrate is a common contaminant of drinking water. Due to its adverse health effects, this study aimed to determine nitrate levels in six southern districts of Tehran. A total of 148 samples were taken from tap waters. In 84.46% (n = 125) of the samples, the nitrate concentration was below national and WHO limits (50 mg/L); however, 15.54% (n = 23) were in violation of the criteria. The total mean concentration of nitrate was 36.15 mg/L (±14.74) ranging from 4.52 to 80.83 mg/L. The overall hazard quotient (HQ) for age groups were ordered as Children (1.71) > Infants (1.24) > Teenagers (1.2) > Adults (0.96). In all districts, the HQ values for infants and children groups were greater than 1, indicating potential adverse health risks. In teenagers age group, only the HQ estimations of districts 10 (HQ = 0.93) and 11 (HQ = 0.74) were lower than 1 and in adults age group, the estimated HQ values for districts were lower than 1 with the exception for district 19 (HQ = 1.19). The sensitivity analysis (SA) showed that nitrate content plays a major role in the value of the assessed risk.

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伊朗德黑兰南部地区硝酸盐的定量和健康风险评估

硝酸盐是饮用水中常见的污染物。由于其对健康的不利影响，本研究旨在确定德黑兰南部六个地区的硝酸盐水平。在自来水中抽取了148个样本。84.46% (n = 125)的样品硝酸盐浓度低于国家和WHO标准(50 mg/L);但有15.54% (n = 23)的患者不符合标准。硝酸盐总平均浓度为36.15 mg/L(±14.74)，范围为4.52 ~ 80.83 mg/L。各年龄组的总危险系数(HQ)为:儿童(1.71)、婴儿(1.24)、青少年(1.2)、成人(0.96)。各区婴儿和儿童组的HQ值均大于1，表明存在潜在的不良健康风险。在青少年年龄组中，只有10区(HQ = 0.93)和11区(HQ = 0.74)的HQ估计值低于1;在成人年龄组中，除19区(HQ = 1.19)外，其余各区的HQ估计值均低于1。敏感性分析(SA)表明，硝酸盐含量对风险评估值起主要作用。

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来源期刊

Journal of Water Reuse and Desalination ENGINEERING, ENVIRONMENTAL-WATER RESOURCES

CiteScore

4.30

自引率

0.00%

发文量

审稿时长

16 weeks

期刊介绍： Journal of Water Reuse and Desalination publishes refereed review articles, theoretical and experimental research papers, new findings and issues of unplanned and planned reuse. The journal welcomes contributions from developing and developed countries.