摘要
以GC/ECD内标法定量测定了沉积物柱样品中有机氯农药含量 ,以便探讨柱样中有机氯农药的垂直变化特征及可能的来源 .样品采自珠江澳门河口 ,柱样以2 10 Pb同位素法定年 .定量测定结果表明以BHCs、DDTs总量计算时 ,样品中含量分别为 0 4 8～ 2 6 2 8ng/ g、1 92～ 39 1 3ng/ g .柱样中农药含量随深度变化和珠江口区的水域水流量随年份的变化有着很好的对应性 .有机氯农药主要是来源于施用农药长期风化后的土壤 .样品中DDTs的浓度超过了河口沉积物化学品风险评价最低值标准 .
This work presents the analysis result of concentration for organochlorinated pesticides in a sedimentary core sample.Pesticides were quantified by GC/ECD with the internal standard material.The core dated by 210 Pb methods.The vertical distribution of pesticides concentration with the depth was discussed.The results showed the concentration of BHCs and DDTs in the core ranged from 0 48ng/g to 26 28ng/g and 1 92～39 13ng/g respectively.The distributing characteristics of organochlorinated pesticides in the core varied with the water fluxes of Pearl River. Organochlorinated pesticides may come from the residue of agricultural soils.Concentration of DDTs was above the effects range low value for marine and estuarine sediments.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2001年第1期81-85,共5页
Environmental Science
基金
国家自然科学重点基金项目(49632060，49702026)
广州省自然科学基金资助项目(963043)
关键词
珠江
澳门河口
柱样
沉积物
有机氯农药
六六六
滴滴涕
Pearl River
Macao Estuary
core
sediment
organochlorinated pesticides
BHCs
DDTs
