摘要
目的掌握太湖水体中微囊藻毒素(MC-LR)及相关因子的时空分布,为太湖周边城市安全供水提供基础数据。方法 2010年1月-2011年12月,在太湖水体中设置15个采样点,每月采集一次样品,采用高灵敏时间分辨荧光免疫分析法(TRFIA)检测各样品中MC-LR的浓度,同时监测藻类密度、水温、高锰酸盐指数、氨氮、叶绿素a等指标。结果太湖水体中MC-LR浓度高峰出现在11月份,枯水期浓度(0.129±0.024μg/L)显著高于丰水期(0.087±0.008μg/L)(t=25.71,P=0.0012),北部(0.150±0.028μg/L)和西部(0.121±0.014μg/L)的平均浓度均显著高于东部(0.077±0.015μg/L)、南部(0.076±0.014μg/L)和中部(0.075±0.012μg/L)(均P<0.001);而藻类密度以9月份最高,丰水期浓度[(913±548)万个/L)]高于枯水期[(467±170)万个/L](t=10.71,P=0.0054),南部[(1 061±409)万个/L]和中部[(1 039±556)万个/L]均显著高于西[(580±216)万个/L]、北[(618±306)万个/L]和东部[(572±218)万个/L](均P<0.001)。结论太湖水体中MC-LR污染存在时间和地域差异,和藻类密度的变化趋势并不一致。应加强监测以保证供水安全。
Objective To investigate the temporal-spatial distribution of microcystins-LR （MC-LR） and related factors in water body of Taihu Lake so as to provide basic data for safe water supply in cities around Taihu Lake. Methods Fifteen sampling points were defined in the water body of Taihu Lake, and water samples were collected monthly from January 2010 to December 2011. MC-LR concentration was detected by highly sensitive time-resolved fluorescence immunoassay, and alage density, water temperature, permanganate index, nitrate-nitrogen and chlorophyll-a were also detected. Results The MC-LR concentration reached the peak in November, and it is significantly higher in dry season than in wet season （ 0.129±0.024 μg/L vs. 0.087±0.008 μg/L, t=25.71, P=0.0012}, in the northern （0.150±0.028 μg/L） and western parts （0.121±0.014 μg/L） of Taihu Lake than in the eastern （ 0.077±0.015 μg/L） , southern （ 0.076±0.014 μg/L） and central parts （0.075±0.012 μg/L, all P〈0.001 ）. Alage density was found to be the highest in September, higher in wet season than in dry season [ （913±548）×10^4/L vs. （467± 170）×10^4/L, P〈0.001 ] as well as higher in the southern[ （ 1,061±409）×10^4/L） and central parts [ （ 1,039±556）×10^4/L] than in the western[ （580±216）×10^4/L], northern[ （618±306）×10^4/L] and eastern parts[ （572±218）×10^4/L, all P〈0.001 ]. Conclusions The pollution of MC-LR in the water body of Taihu Lake has time and regional differences, and it is not consistent with the ehange trend of algae density. It is necessary to strengthen the monitoring so as to ensure the safety of water supply.
出处
《实用预防医学》
CAS
2016年第9期1048-1051,共4页
Practical Preventive Medicine
基金
江苏省卫生厅科研基金项目(HD200865)
无锡市科技局基金项目(CSZ00958)
关键词
微囊藻毒素-LR
时空分布
太湖水体
Microcystins-LR
Temporal-spatial distribution
Water body of Taihu Lake
