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| 杭州贴沙河微囊藻毒素污染特征及健康风险评价 |
| Characteristics and Health Risk Assessment of Microcystins Pollution in Tiesha Rive |
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| DOI： |
| 中文关键词: 微囊藻毒素 蓝藻异常增殖 污染特征 健康风险评价 贴沙河 |
| 英文关键词: Microcystin Abnormal proliferation of cyanobacteria Pollution characteristics Health risk assessment Tiesha River |
| 基金项目:杭州市环境保护科技基金资助项目（2011002，2013HZHB002） |
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| 中文摘要: |
| 在2014年9月杭州贴沙河出现蓝藻异常增殖期间，利用固相萃取-液质联用法对水体中胞外微囊藻毒素（EMC）和总微囊藻毒素（TMC）进行监测。共检出以MC-LR为主的8种微囊藻毒素（MC）单体， TMC总的质量浓度为63.9 ng/L～1 090 ng/L，其中MC-LR质量浓度为31.6 ng/L～472 ng/L，毒性等效MC-LR浓度为51.8 ng/L～862 ng/L，检出的MC-LR浓度值均低于限值标准。采用USEPA推荐模型对水体中MC污染的健康风险进行评价。各批次水样中MC-LR的非致癌健康风险指数（HI）为0.03～0.39，毒性等效MC-LR的HI介于0.04和0.72之间，均低于基准值，说明贴沙河作为饮用水水源尚无明显的健康风险。 |
| 英文摘要: |
| Extracellular microcystin (EMC) and total microcystin (TMC) were quantitatively determined by SPE〖FK（W。*9〗〖CD*2〗〖FK）〗UPLC〖FK（W。*9〗〖CD*2〗〖FK）〗MS〖FK（W。*9〗〖CD*2〗〖FK）〗MS in Sep.2014 from Tiesha River during the period of abnormal proliferation of cyanobacteria. The results showed that 8 kinds of MC were detected in trace amount, and MC-LR were the majority. Total concentrations of TMC ranged from 63.9 ng/L to 1 090 ng/L, among which MC-LR were 31.6 ng/L～472 ng/L and the toxicity equivalent MC-LR concentration were 51.8 ng/L～862 ng/L. The concentrations of all detected MC-LR were below the standard limit. In addition, human health risk assessment of MC in water was performed using USEPA recommended methods, the non carcinogenic risks index (HI) of MC-LR were 0.03～0.39, and the HI of the toxicity equivalent MC-LR were 0.04～0.72, both were below the reference value. This could explain that the source of drinking water in Tiesha River had no significant health risks yet. |
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