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Drinking Water Treatments for Arsenic and Manganese Removal and Health Risk Assessment in White Rock, Canada
Exposure and Health ( IF 6.7 ) Pub Date : 2019-12-20 , DOI: 10.1007/s12403-019-00338-4
Guangji Hu , Haroon R. Mian , Roberta Dyck , Madjid Mohseni , Saad Jasim , Kasun Hewage , Rehan Sadiq

The City of White Rock, Canada has been facing challenges of elevated concentrations of arsenic and manganese in its drinking water supply. A pilot water treatment study was conducted to explore effective contaminant removal solutions for human health risk mitigation. The arsenic and manganese removal performance of four treatment processes, including ozonation-manganese greensand filtration (OSF), OSF-iron-based granular media adsorption (OSFIA), the Burgess Iron Removal Method (BIRM), and BIRM-iron-based granular media adsorption (BIA) were evaluated. The non-cancer health risks and the incremental lifetime cancer risks (ILCR) posed by arsenic in different water sources were also assessed. The results show that OSFIA treatment achieved the highest arsenic and manganese removal. An average arsenic removal rate of 68.5% (initial concentration = 9.3 μg/L) was observed using OSFIA during two months of treatment, while manganese (initial concentration = 133.9 μg/L) can be completely removed. The arsenic removal was mainly be attributed to the adsorption of iron-based granular media. The mean values of non-cancer health risks of arsenic exposure due to oral intake of treated water were identified to be lower than the critical threshold for different age groups. In addition, the probability of critical ILCR occurrence can be greatly reduced. Based on the results from the pilot study, OSFIA was selected to construct a full-scale water treatment plant. Arsenic and manganese concentrations in the effluent from the plant can be reduced to a low-to-undetectable level, achieving negligible health risks to the residents of the city.



中文翻译:

加拿大白石的饮用水处理中的砷和锰去除及健康风险评估

加拿大白石市一直面临饮用水供应中砷和锰浓度升高的挑战。进行了一项水处理试验研究,以探索有效的污染物去除解决方案,以减轻人类健康风险。四个处理过程的除砷和除锰性能,包括臭氧化-锰绿砂过滤(OSF),OSF-铁基颗粒介质吸附(OSFIA),Burgess除铁法(BIRM)和BIRM-铁基颗粒介质评价了吸附(BIA)。还评估了砷在不同水源中造成的非癌症健康风险和终生癌症增量风险(ILCR)。结果表明,OSFIA处理获得了最高的砷和锰去除率。平均砷去除率为68.5%(初始浓度= 9)。在治疗的两个月中,使用OSFIA观察到3μg/ L),而锰(初始浓度= 133.9μg/ L)可以完全去除。砷的去除主要归因于铁基颗粒介质的吸附。经口摄入经处理的水导致砷暴露的非癌症健康风险的平均值被确定为低于不同年龄组的临界阈值。此外,可以大大降低发生关键ILCR的可能性。根据试点研究的结果,选择OSFIA建造一座大型水处理厂。可以将工厂废水中的砷和锰浓度降低到无法检测到的低水平,从而对城市居民的健康危害可忽略不计。锰(初始浓度= 133.9μg/ L)可以完全去除。砷的去除主要归因于铁基颗粒介质的吸附。经口摄入经处理的水导致砷暴露的非癌症健康风险的平均值被确定为低于不同年龄组的临界阈值。此外,可以大大降低发生关键ILCR的可能性。根据试点研究的结果,选择OSFIA建造一座大型水处理厂。可以将工厂废水中的砷和锰浓度降低到无法检测到的低水平,从而对城市居民的健康危害可忽略不计。锰(初始浓度= 133.9μg/ L)可以完全去除。砷的去除主要归因于铁基颗粒介质的吸附。经口摄入经处理的水导致砷暴露的非癌症健康风险的平均值被确定为低于不同年龄组的临界阈值。此外,可以大大降低发生关键ILCR的可能性。根据试点研究的结果,选择OSFIA建造一座大型水处理厂。可以将工厂废水中的砷和锰浓度降低到无法检测到的低水平,从而对城市居民的健康危害可忽略不计。砷的去除主要归因于铁基颗粒介质的吸附。经口摄入经处理的水导致砷暴露的非癌症健康风险的平均值被确定为低于不同年龄组的临界阈值。此外,可以大大降低发生关键ILCR的可能性。根据试点研究的结果,选择OSFIA建造一座大型水处理厂。可以将工厂废水中的砷和锰浓度降低到无法检测到的低水平,从而对城市居民的健康危害可忽略不计。砷的去除主要归因于铁基颗粒介质的吸附。经口摄入经处理的水导致砷暴露的非癌症健康风险的平均值被确定为低于不同年龄组的临界阈值。此外,可以大大降低发生关键ILCR的可能性。根据试点研究的结果,选择OSFIA建造一座大型水处理厂。可以将工厂废水中的砷和锰浓度降低到无法检测到的低水平,从而对城市居民的健康危害可忽略不计。此外,可以大大降低发生关键ILCR的可能性。根据试点研究的结果,选择OSFIA建造一座大型水处理厂。可以将工厂废水中的砷和锰浓度降低到低到无法检测的水平,对城市居民的健康危害可忽略不计。此外,可以大大降低发生关键ILCR的可能性。根据试点研究的结果,选择OSFIA建造一座大型水处理厂。可以将工厂废水中的砷和锰浓度降低到低到无法检测的水平,对城市居民的健康危害可忽略不计。

更新日期:2019-12-20
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