摘要
采用索式提取法和气相色谱法对黄河内蒙古段头道拐断面沉积物中的六六六(HCHs)和多氯联苯(PCBs)进行了分析测定。结果表明:HCHs和∑PCBs在黄河内蒙古段头道拐断面沉积物中均有检出,α?HCH和β?HCH的平均浓度分别为6.70ng/g和6.24ng/g,处于中等污染水平;除八氯联苯外,PCBs的各异构体在该断面沉积物中均有检出,且检出率均在65%以上,∑PCBs平均浓度为1.46ng/g,处于较低污染水平;HCHs和PCBs的残留水平随时间均没有明显的变化。对黄河内蒙古段沉积物中HCHs和PCBs污染物的来源进行了解析,HCHs污染的最大贡献源是河套灌区的农业退水,PCBs的主要来源是历史残留。
HCHs and PCBs in sediment samples taken from the Toudaoguai section of the Yellow River are identified by using hoxslet extraction and chromatography.Both HCHs and ∑PCBs are contained in sediment samples.The average of α-HCH and β-HCH are 6.70 ng/g and 6.24 ng/g on the average.All the isomers of PCBs are contained except the 8-PCBs,their containing rate is more than 65%.The average of ∑PCBs is 1.46 ng/g,at the low level.Both HCHs and PCBs vary little on different occasions.The main pollutants sources of HCHs is from the agriculture waste water of HeTao Irrigation,while the PCBs is from history residue.
出处
《中国农村水利水电》
北大核心
2011年第3期26-28,共3页
China Rural Water and Hydropower
基金
国家自然科学基金项目(50669003)
关键词
黄河内蒙古段
头道拐断面
HCHS
多氯联苯
源解析
Inner Mongolia section of the Yellow River
Toudaoguai Section
HCHs
PCBs
source analysis
