刘敏, 殷浩文. 江南某城市饮用水中微囊藻毒素调查及初步健康风险评价[J]. 环境与职业医学, 2013, 30(12): 893-898.
引用本文: 刘敏, 殷浩文. 江南某城市饮用水中微囊藻毒素调查及初步健康风险评价[J]. 环境与职业医学, 2013, 30(12): 893-898.
LIU Min , YIN Hao-wen . Determination and Preliminary Health Risk Assessment of Microcystins in Drinking Water in a City in the South of Yangtze River[J]. Journal of Environmental and Occupational Medicine, 2013, 30(12): 893-898.
Citation: LIU Min , YIN Hao-wen . Determination and Preliminary Health Risk Assessment of Microcystins in Drinking Water in a City in the South of Yangtze River[J]. Journal of Environmental and Occupational Medicine, 2013, 30(12): 893-898.

江南某城市饮用水中微囊藻毒素调查及初步健康风险评价

Determination and Preliminary Health Risk Assessment of Microcystins in Drinking Water in a City in the South of Yangtze River

  • 摘要: 目的 调查江南某城市饮用水中微囊藻毒素MCs(MC-LR、MC-RR、MC-YR)浓度,并进行初步健康风险评估。

    方法 2010年6月-2011年5月,按月采集各城区饮用水样品,经C18固相萃取柱净化富集后,采用超高效液相色谱-电喷雾三重四级杆串联质谱对3种典型的MCs进行定量分析,并应用水环境健康风险评价模型对监测结果进行初步评价。

    结果 从季节性变化看, MCs全年均有检出,浓度在ND~16.3 ng/L,以MC-LR为主,其中8月达最高值;部分城区饮用水中多个月份中的MC-LR浓度超过10.0 ng/L;由于供水差异,各区浓度差异较大,浓度最低的城区年平均值为0.2 ng/L,最高者年平均值为6.7 ng/L。个人年健康风险值范围为(0.15& #215;10-6~5.62& #215;10-6)/a。各城区饮用水中MCs所导致的健康风险低于国际辐射防护委员会(ICRP)和美国环境保护署(US EPA)的推荐值(5& #215;10-5)/a和(1& #215;10-4)/a。

    结论 供水水质不均衡,饮用水中藻毒素浓度差异较大,大部分城区中饮用水存在一定的健康风险。

     

    Abstract: Objective To quantify microcystins (MCs:MC-LR, MC-RR, MC-YR) in urban drinking water of a city along the south of Yangtze River and to conduct a preliminary health risk assessment.

    Methods From June 2010 to May 2011, the drinking water was monthly sampled in each district of the selected city. After the water samples were cleaned and enriched by solid phase extraction (SPE) using C18, the three typical MCs, MC-LR, MC-RR, and MC-YR, were quantified by ultra performance liquid chromatography/tandem mass spectrometry (UPLC-MS/MS).

    Results MCs were detected in the whole year (MC-LR was the main component), and the content ranged from ND to 16.3 ng/L with the highest concentration found in the August sample. The concentrations of MC-LR were over 10.0 ng/L in several months for some districts. Due to the diversity of water supply, MCs concentrations varied significantly. The minimum and maximum valuesof average MCs concentrations in the whole year were 0.2 and 6.7 ng/L respectively. The levels of individual health risk of drinking water ranged from (0.15& #215;10-6 to 5.62& #215;10-6)/a in the selected area. In most districts, the health risk values contributed by MCs were lower than the maximum allowance level recommended by ICRP (5& #215;10-5)/a and by US EPA (1& #215;10-4)/a.

    Conclusion The diversity of water supply has generated differences in the contents of MCs in the districts investigated. Drinking water in most selected districts present certain health risks.

     

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