太湖流域水源地有机氯农药分布特征与生态风险评价

发布时间：2018-07-09 19:17

本文选题：太湖 + 有机氯农药　；参考：《环境污染与防治》2017年08期

【摘要】：为系统了解太湖流域主要水源地有机氯农药(OCPs)污染情况,于2012年3月和6月采集太湖流域主要水源地水相、悬浮颗粒物和沉积物样品,并利用气相色谱(GC)—质谱(MS)联用仪对水源地OCPs的浓度水平进行监测分析。结果表明,3月水相和悬浮颗粒物中OCPs的质量浓度分别为4.03~18.70ng/L、ND(未检出)~27.60ng/g,高于6月的0.23~1.57ng/L、1.06~5.05ng/g。3月沉积物中仅有Y3采样点检出OCPs,而6月各采样点均有检出。6月水相中Y5、Y7和Y10采样点以α-六六六(α-HCH)为主,Y3和Y8采样点以γ-六六六(γ-HCH)为主,其余采样点均为β-六六六(β-HCH)占绝对优势;悬浮颗粒物中γ-HCH、α-HCH构成六六六(HCHs)的主要物质,而稳定性较高的β-HCH浓度却很低。与国内外研究比较,太湖流域水源地OCPs污染水平较低。大部分悬浮颗粒物中OCPs污染低于风险评价高值(ER-M),部分采样点高于风险评价低值(ER-L),表明存在一定的生态风险,需加强相关方面的防治工作。沉积物中污染物的浓度均低于ER-L,表明太湖流域沉积物的污染程度较低,在安全生态风险范围内。
[Abstract]:In order to systematically understand the pollution of organochlorine pesticides (OCPs) in the main water sources of Taihu Lake Basin, water phase, suspended particulates and sediment samples were collected in March and June 2012. The concentration level of OCPs in water source was monitored and analyzed by gas chromatography (GC)-mass spectrometry (MS). The results showed that the mass concentrations of OCPs in aqueous phase and suspended particulates in March were 4.03 ~ 18.70 ng / L ND (undetected) 27.60 ng / g / g respectively, which was higher than that of 0.23 ~ 1.57 ng / L ~ (-1) N ~ (-1) N / L ~ (-1) in June, and only Y3 samples were detected in sediment samples of Y3 / g / g ~ (3) month in June, and Y5 ~ (5) Y _ (7) and Y _ (10) were sampled in water phase in June. The main sampling points were 伪 -HCH (伪 -HCH) and Y _ (3) and Y _ (8), and 纬 -HCH (纬 -HCH) was the main sampling point. The other sampling points were 尾 -HCH (尾 -HCH), 纬 -HCH, 伪 -HCH in suspended particulates constituted the main substances of HCHS, but the concentration of 尾 -HCH with high stability was very low. Compared with domestic and international studies, the pollution level of OCPs in Taihu Lake basin is lower. The pollution of OCPs in most suspended particulates is lower than the high value of risk assessment (ER-M), and some sampling points are higher than the low value of risk assessment (ER-L), which indicates that there are certain ecological risks, so it is necessary to strengthen the prevention and control work. The concentrations of pollutants in sediments were all lower than those in ER-L, which indicated that the pollution degree of sediments in Taihu Lake basin was lower, and it was in the range of safety ecological risk.
【作者单位】：盐城师范学院城市与规划学院;华东师范大学地理科学学院;
【基金】：国家自然科学基金资助项目(No.41501567、No.41471060) 江苏省自然科学基金资助项目(No.BK20160446) 江苏省教育厅项目(No.14KJA170006)
【分类号】：X592;X826

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