尼日利亚中北部常见包装水长期贮存质量调查

F. Okeola, Taofeeqat Abu, A. Mohammed, M. Orosun, A. Baba, M. Adeboje
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引用次数: 0

摘要

本研究调查了长期储存条件对尼日利亚中北部随机选择的三种品牌的小袋和瓶装水的理化参数、有毒金属、微生物负荷和健康风险评估的影响。从10个不同的工厂收集了180个水品牌(小袋和瓶装)的样品,并分为三组。他们被立即分析(初始),暴露在温和的阳光下(用容器储存)和暴露在强烈的阳光下(没有容器储存)六周。理化参数(小袋和瓶子)的结果在世界卫生组织(世卫组织)和尼日利亚标准组织(尼日利亚标准组织)规定的范围内。与世卫组织和美国国家环境与安全委员会设定的允许限量(括号内每种重金属的值)相比,小袋水和瓶装水的重金属分析结果分别为0.15 - 0.51 mg/L (0.10 mg/L, 0.05 mg/L)、0.13 - 0.38 mg/L (0.015 mg/L, 0.01 mg/L)和0.55 - 1.11 mg/L (0.03 mg/L, 0.3 mg/L)。总细菌计数(TBC)、总大肠菌群计数(TCC)、粪大肠菌群计数(FCC)和总真菌计数(TFC)的微生物分析结果分别为6.58 ~ 124.51 Cfu/100 mL、0.52 ~ 37.56 Cfu/100 mL、0.07 ~ 5.00 Cfu/100 mL、0 ~ 2.07 Cfu/100 mL,没有有效的质量控制体系。增量终身癌症风险(ILCR)评估显示,饮用该水的民众存在致癌健康风险。该研究的结论是,长时间储存在阳光下的水不适合人类饮用,因此需要适当的机构进行充分的监测。
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Investigation on the Quality of Prolonged Storage of Packaged Water Commonly Produced in North Central, Nigeria
This study investigated the effects of prolonged storage conditions on the physicochemical parameter, toxic metals, microbial loads, and health risks assessment of randomly selected three brands of sachet and bottled water in North Central, Nigeria. One hundred eighty samples of water brands (sachet and bottled) were collected from 10 different factories and were grouped into three. They were analyzed immediately (initial), being exposed to mild sunlight (stored with a container) and exposed to intense sunlight (stored without a container) conditions for six weeks. The results of the physicochemical parameters (sachet and bottle) were within the limits set by the World Health Organization (WHO) and the Standard Organization of Nigeria (SON). While the results of heavy metals analysis for both sachet and bottled water recorded 0.15 - 0.51 mg/L (0.10 mg/L , 0.05 mg/L), 0.13 - 0.38 mg/L (0.015 mg/L, 0.01 mg/L) and 0.55 - 1.11 mg/L (0.03 mg/L, 0.3 mg/L) for Chromium (Cr), Lead (Pb) and Iron (Fe) respectively, as compared to the permissible limits (values in the bracket for each heavy metals) set by WHO and SON. The microbial analysis results ranged between 6.58 - 124.51 Cfu/100 mL, 0.52 - 37.56 Cfu/100 mL, 0.07 - 5.00 Cfu/100 mL, 0 - 2.07 Cfu/100 mL for Total Bacteria Count (TBC), Total Coliform Count (TCC), Faecal Coliform Count (FCC) and Total Fungal Count (TFC) respectively, which showed no effective quality control system. Incremental lifetime cancer risk (ILCR) assessment revealed a carcinogenic health risk to the populace drinking this water. The study concludes that water stored under sunlight for a long period is not good for human consumption and therefore adequate monitoring by the appropriate agencies is emphasized.
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