摘要:
采用电子捕获检测器气相色谱仪(GC-ECD)测定鄱阳湖龙口地区4个沉积物柱样中有机氯农药含量。结果表明,4个沉积物柱样间有机氯农药含量差异显著,总有机氯农药(∑OCPs)含量为7.78~93.7 ng/g,总六六六(∑HCHs)含量为0.73~39.6 ng/g,总滴滴涕(∑DDTs)的含量为2.44~49.4 ng/g。与国内其他同类样品相比,研究区各化合物的含量水平明显偏高;沉积物中总有机碳(TOC)和OCPs有较好的相关关系;与沉积物风险评估值对比,鄱阳湖龙口地区的有机氯农药存在一定的生态风险。
Abstract:
The concentration of organochlorine pesticides (OCPs) in 4 sediment samples from Longkou, Poyang Lake was analyzed by GCECD. Concentration of the chemicals was in the range of 7.78~93.7 ng/g for total OCPs, 0.73~39.6 ng/g for HCHs and 2.44~49.4 ng/g for DDTs. Compared with sediments from other areas, OCPs concentrations in sediments were much higher in the studied area. Concentrations of OCPs and total organic carbon (TOC) showed a good correlation in the sediments. By comparing the effects rangemedian (ERL) and effects rangelow (ERM) values for the risk evaluation, OCPs in the surface sediments from Longkou, Poyang Lake has suffered a threat from the ecological risk.