| 九龙江口水体中有机氯农药分布特征及归宿 |
| 摘要点击 2400 全文点击 2761 投稿时间：2000-07-31 |
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| 中文关键词 九龙江口 有机氯农药 水体 评价 |
| 英文关键词 Jiulong River Estuary organic chlorine pesticide water evaluation |
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| 中文摘要 |
| 1999-06,对九龙江口15个站位的表层水,13个站位的间隙水进行了18种有机氯农药的测定结果表明,有机氯农药总含量在表层水中的浓度范围为51.3～2479nng/L在间隙水中的浓度范围是266～33355ng/L.对不同有机氯的含量在各站位的分布特征进行了探讨,发现Methoxychlor(甲氧滴涕),Endosulfan Sulfate(硫酸硫丹),Endrinaldehyde(乙醛异狄氏剂)以及Endosulfan II(硫丹),Dieldrin(狄氏剂),Deta-HCH和Beta-HCH 7种有机氯农药在18种有机氯农药中都占主要部分;九龙江口的六六六的含量顺序:β＞δ>α＞γ;对于滴滴涕,表层水中的含量:DDE>>DDD＞DDT;间隙水中的含量:DDE>>DDT＞DDD,二者DDE的含量都在总DDTs的50%以上,说明环境中的DDTs主要降解为DDE;九龙江口有机氯农药随着盐度梯度,在河口中呈去除趋势;且间隙水中有机氯农药比表层水中的浓度高,说明其倾向于吸附在沉积物颗粒上,其浓度差使得有机污染物可能通过再悬浮等过程从底层向上层迁移.九龙江口的有机氯农药污染与其他港湾相比,污染水平相当,部分站位水质有机氯农药(HCHs和DDTs)超过国家一类水质的标准. |
| 英文摘要 |
| Organochlorine Pesticides at the water(surface water and porewater) in Jiulong River Estuary were determined. The range of organochlorine pesticides at surface water was 51.3～2479ng/L, and the concentration in porewater was 266～33355ng/L. The results showed that the organochlorine pesticides were removed in the estuary and the sediments were the reservior of the organochlorine pesticides. Compared with the results of other harbor and estuaries , it showed that the contamination for organic chlorine pollutants in Jiulong River Estuary was similar to those of others. At the same time,the risk of organochlorine pesticides in the estuary was evaluated. |
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