| 引用本文: | 王永强,国晓春,卢少勇,宋迪,蒋昀耕,杨莉园.高原富营养化湖泊杞麓湖微囊藻毒素分布特征、相关因子及其健康风险分析.湖泊科学,2024,36(1):52-63. DOI:10.18307/2024.0113 |
| Wang Yongqiang,Guo Xiaochun,Lu Shaoyong,Song Di,Jiang Yungeng,Yang Liyuan.Spatial distribution, related environmental factors and health risk assessment of microcystins in Lake Qilu, a eutrophic plateau lake. J. Lake Sci.2024,36(1):52-63. DOI:10.18307/2024.0113 |
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| 高原富营养化湖泊杞麓湖微囊藻毒素分布特征、相关因子及其健康风险分析 |
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王永强1, 国晓春1, 卢少勇1, 宋迪2, 蒋昀耕1, 杨莉园1
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1.中国环境科学研究院, 湖泊水污染治理与生态修复技术国家工程实验室, 北京 100012;2.云南省生态环境科学研究院, 云南省高原湖泊流域污染过程与管理重点实验室, 昆明 650034
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| 摘要: |
| 杞麓湖作为典型的富营养化高原湖泊,其藻华暴发引发的微囊藻毒素(microcystins, MCs)污染问题会危害水生态安全并造成人体健康风险。为了评估杞麓湖流域MCs的秋冬季节污染现状以及健康风险情况,对湖内和7条主要入湖河流入湖口的表层水进行采样检测,分析MCs主要异构体的时空分布特征,研究MCs与水质和浮游植物等环境因子的关系,并通过人体非致癌健康风险评价MCs的风险等级。结果发现,MCs浓度自秋季到冬季呈下降趋势,秋季湖内胞内MCs(IMCs)占比超过99%,冬季IMCs与胞外MCs(EMCs)浓度接近。MC-RR和MC-LR是主要的MCs异构体类型,其中MC-RR在秋季浓度占比高于MC-LR和MC-YR,而冬季MC-LR最高。MCs与微囊藻密度等生物因子呈极显著正相关关系,与TN、TP和NH3-N营养盐呈显著负相关关系。杞麓湖EMCs污染的风险指数范围为0.004~0.110,处于极低或低风险,冬季风险略高于秋季,因南岸入湖EMCs污染以及湖内IMCs释放带来的风险需要进一步关注。 |
| 关键词: 微囊藻毒素 杞麓湖 环境因子 时空分布 健康风险 |
| DOI：10.18307/2024.0113 |
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| 基金项目:云南省高原湖泊流域污染过程与管理重点实验室开放基金项目和云南省科技厅科技计划项目(202203AC100002-03)联合资助。 |
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| Spatial distribution, related environmental factors and health risk assessment of microcystins in Lake Qilu, a eutrophic plateau lake |
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Wang Yongqiang1, Guo Xiaochun1, Lu Shaoyong1, Song Di2, Jiang Yungeng1, Yang Liyuan1
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1.National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Chinese Research Academy of Environmental Sciences, Beijing 100012, P.R. China;2.Yunnan Key Laboratory for Pollution Processes and Control of Plateau Lake-Watersheds, Yunnan Academy of Ecological and Environmental Sciences, Kunming 650034, P.R. China
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| Abstract: |
| Lake Qilu, a typical eutrophic plateau lake, the microcystin (MC) pollution caused by algal blooms in it will harm lake ecosystem and increase human health risks. To assess the pollution status and health risks of MCs in Lake Qilu Basin in autumn and winter, the surface water of Lake Qilu and seven major rivers entering the lake were sampled and analyzed, the temporal and spatial distribution characteristics of MCs isomers were analyzed. The relationship between MCs and water quality, phytoplankton and other environmental factors was investigated. The health risk posed by MCs was evaluated by human non-carcinogenic health risk. Our investigation results showed that MCs concentration decreased from autumn to winter. In autumn, IMCs accounted for more than 99%, and in winter, IMCs concentration was close to EMCs concentration. MC-RR and MC-LR were the main MCs isomers. The concentration ratio of MC-RR in autumn was higher than those of MC-LR and MC-YR. MC-LR concentration in winter was the highest. MCs was positively correlated with Microcystis density and other biological factors, and negatively correlated with TN, TP and NH3-N nutrients. The risk index of MCs pollution in Lake Qilu ranged from 0.004 to 0.110, i.e., very low or low risk level. The risk in winter was slightly higher than that in autumn. Further attention should be paid to the risk caused by EMCs pollution on the south bank and IMCs release in the lake. |
| Key words: Microcystin Lake Qilu environmental factors spatial and temporal distribution health risk |
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