饮用水中的硝酸盐、亚硝酸盐和总有机碳（TOC）与胃肠道疾病的关系。
Association of nitrate, nitrite, and total organic carbon (TOC) in drinking water and gastrointestinal disease.
机构信息
Department of Environmental Health Engineering, Isfahan University of Medical Sciences, Isfahan, Iran.
出版信息
J Environ Public Health. 2013;2013:603468. doi: 10.1155/2013/603468. Epub 2013 Apr 15.
OBJECTIVE
We aimed to investigate the amounts of nitrate, nitrite, and total organic carbon (TOC) in two drinking water sources and their relationship with some gastrointestinal diseases.
METHODS
This cross-sectional study was conducted in 2012 in Iran. Two wells located in residential areas were selected for sampling and measuring the TOC, nitrate (NO3(-)), and nitrite (NO2(-)). This water is used for drinking as well as for industrial and agricultural consumption. Nitrate and nitrite concentrations of water samples were analyzed using DR 5000 spectrophotometer. The information of patients was collected from the records of the main referral hospital of the region for gastrointestinal diseases.
RESULTS
In both areas under study, the mean water nitrate and nitrite concentrations were higher in July than in other months. The mean TOC concentrations in areas 1 and 2 were 2.29 ± 0.012 and 2.03 ± 0.309, respectively. Pollutant concentration and gastrointestinal disease did not show any significant relationship (P > 0.05).
CONCLUSION
Although we did not document significant association of nitrite, nitrate, and TOC content of water with gastrointestinal diseases, it should be considered that such health hazards may develop over time, and the quality of water content should be controlled to prevent different diseases.
目的
我们旨在调查两种饮用水源中的硝酸盐、亚硝酸盐和总有机碳（TOC）含量及其与某些胃肠道疾病的关系。
方法
这是 2012 年在伊朗进行的一项横断面研究。选择两个位于居民区的水井进行采样和 TOC、硝酸盐（NO3(-)）和亚硝酸盐（NO2(-)）的测量。该水既用于饮用，也用于工业和农业消费。使用 DR 5000 分光光度计分析水样中的硝酸盐和亚硝酸盐浓度。患者信息从该地区主要转诊医院的胃肠道疾病记录中收集。
结果
在所研究的两个地区，7 月的水硝酸盐和亚硝酸盐浓度均高于其他月份。1 区和 2 区的 TOC 浓度平均值分别为 2.29 ± 0.012 和 2.03 ± 0.309。污染物浓度与胃肠道疾病之间没有显著关系（P > 0.05）。
结论
尽管我们没有记录水中亚硝酸盐、硝酸盐和 TOC 含量与胃肠道疾病之间存在显著关联，但应该考虑到，随着时间的推移，可能会出现此类健康危害，应控制水质，以预防各种疾病。
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