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| 官厅水库沉积物表层中的有机氯农药分布特征及风险评价 |
| Distribution of Organochlorine Pesticides in Surface Sediments from Guanting Reservoir and Its Risk Evaluation |
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| DOI： |
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| 英文关键词: |
| 基金项目:国家自然科学基金资助项目 (20247002)；北京市自然科学基金资助项目(8062010) |
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| 中文摘要: |
| 采用气相色谱法对北京市官厅水库沉积物表层中持久性有机氯农药（OCPs）的残留状况进行了调查，并对有机氯农药污染水平和生态风险作出评价。结果表明：沉积物中有机氯农药总含量为8.48 ng/g～24.40 ng/g，其中HCHs和DDTs的含量较高，分别为1.11 ng/g～7.73 ng/g和2.97 ng/g～10.52 ng/g，其组分特征为来自环境的残留。与沉积物风险评估低值（ERL）和风险评估中值（ERM）对比评价沉积物中有机污染物的风险程度，官厅水库沉积物表层中的有机氯农药存在一定的生态风险。 |
| 英文摘要: |
| The contents of organochlorine pesticides (OCPs) in sediment samples collected from 6 sites of Guanting Reservoir were analyzed by using gas chromatography. The contamination level and risk were assessed. The results showed that the concentration of total OCPs ranged from 8.48 ng/g to 24.40 ng/g. The contentrations of HCHs and DDTs were higher than that of other compounds and ranged from 1.11 ng/g to 7.73 ng/g and from 2.97 ng/g to 10.52 ng/g respectively. Their composition characters indicated that the pesticides came from environmental residues. Comparing the effects range-low (ERL) values and effects range-median (ERM) values from the risk evaluation, OCPs in surface sediments from the middle and lower reaches of the Guanting Reservoir had a risk to consumers of bottom feeders. |
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