| 基于太湖微囊藻毒素的叶绿素a阈值研究 |
| 摘要点击 1843 全文点击 1137 投稿时间：2014-05-15 修订日期：2014-06-26 |
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| 中文关键词 太湖 微囊藻毒素 叶绿素a 富营养指标 阈值 |
| 英文关键词 Lake Taihu microcystins chlorophyll a eutrophication factors threshold |
| 作者 | 单位 | E-mail | | 魏代春 | 中国环境科学研究院地下水与环境系统工程创新基地, 北京 100012
兰州交通大学环境与市政工程学院, 兰州 730070 | weidaichun00@126.com | | 苏婧 | 中国环境科学研究院地下水与环境系统工程创新基地, 北京 100012
广东省浩蓝环保水污染治理院士工作站, 广州 510630 | sujing169@163.com | | 纪丹凤 | 中国环境科学研究院地下水与环境系统工程创新基地, 北京 100012 | | | 伏小勇 | 兰州交通大学环境与市政工程学院, 兰州 730070 | | | 王骥 | 中国环境科学研究院地下水与环境系统工程创新基地, 北京 100012 | | | 霍守亮 | 中国环境科学研究院地下水与环境系统工程创新基地, 北京 100012 | | | 崔驰飞 | 中国环境科学研究院地下水与环境系统工程创新基地, 北京 100012 | | | 唐军 | 中国环境科学研究院地下水与环境系统工程创新基地, 北京 100012 | | | 席北斗 | 中国环境科学研究院地下水与环境系统工程创新基地, 北京 100012 | |
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| 中文摘要 |
| 以探讨叶绿素a（Chl-a）阈值为主要目的于2013年6~10月间每月在太湖采样，通过固相萃取超高效液相色谱串联质谱法对水体中3种微囊藻毒素（MC-LR、MC-RR、MC-YR）进行检测. 利用SPSS软件分析各种形态的微囊藻毒素（MCs）与总氮（TN）、总磷（TP）、Chl-a、高锰酸盐指数等富营养指标的相关性，分析了MC-LR、MCs与Chl-a的关系. 结果表明，太湖MCs污染较严重，其浓度的空间分布特征为：梅梁湾> 贡湖、西部沿岸区> 湖心区> 胥湖区、南部湖区，并以MC-LR浓度最高；相关性分析表明MC-LR、MC-RR、MC-YR及MCs均与高锰酸盐指数、TN、TP、Chl-a呈极显著正相关（P< 0.01）. 结合饮用水中MC-LR和MCs的标准限值分析得出，太湖Chl-a的阈值是12.26mg·m-3，与美国北卡罗莱纳州湖泊的Chl-a标准值比较属于安全阈值，具有一定的科学性. |
| 英文摘要 |
| Water samples were collected in Lake Taihu from June to October in 2013 in order to investigate the threshold of chlorophyll a (Chl-a). The concentrations of three microcystins isomers (MC-LR, MC-RR, MC-YR) were detected by means of solid phase extraction and high performance liquid chromatography-tandem mass spectrometry. The correlations between various MCs and eutrophication factors, for instance of total nitrogen(TN), total phosphorus(TP), chlorophyll a, permanganate index etc were analyzed. The threshold of Chl-a was studied based on the relationships between MC-LR, MCs and Chl-a. The results showed that Lake Taihu was severely polluted by MCs and its spatial distribution could be described as follows: the concentration in Meiliang Bay was the highest, followed by Gonghu Bay and Western Lake, and Lake Center; the least polluted areas were in Lake Xuhu and Southern Lake. The concentration of MC-LR was the highest among the 3 MCs. The correlation analysis indicated that MC-LR, MC-RR, MC-YR and MCs had very positive correlation with permanganate index, TN, TP and Chl-a (P< 0.01). The threshold value of Chl-a was 12.26 mg·m-3 according to the standard thresholds of MC-LR and MCs in drinking water. The threshold value of Chl-a in Lake Taihu was very close to the standard in the State of North Carolina, which demonstrated that the threshold value provided in this study was reasonable. |
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