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 River

作　　者：张明[1] 唐访良[1] 徐建芬[1] 朱英俊[1] 池怡[1] 

机构地区：[1]杭州市环境监测中心站,浙江杭州310007

出　　处：《环境监测管理与技术》2016年第1期27-31,共5页The Administration and Technique of Environmental Monitoring

基　　金：杭州市环境保护科技基金资助项目(2011002;2013HZHB002)

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。Extracellular microcystin( EMC) and total microcystin( TMC) were quantitatively determined by SPE- UPLC- MS- 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 were31. 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.

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 

分 类 号：X820.4[环境科学与工程—环境工程]