| 摘要: |
| 以常州市典型城市黑臭水体神童滨为对象，利用大型溞-固定沉积物毒性实验，成功地对治理前、后污染河流沉积物毒性变化进行监测，获得较浸出液毒性实验更灵敏的结果。结果表明，治理前污染河流4个采样点沉积物的毒性均为中毒级，治理后，3个采样点的毒性下降到微毒级，1个点位毒性为无毒级。根据河道整治前、后的沉积物对水生生物的综合毒性变化，评价河道治理前的危害程度和治理后的生态安全性，为采取合理的整治方法以达到可持续治理效果提供科学依据。 |
| 关键词: 全沉积物毒性测试 浸出液 固定沉积物 大型溞 急性毒性 神童浜 |
| DOI： |
| 分类号:X835 |
| 文献标识码:B |
| 基金项目:江苏省环境监测科研基金资助项目（1803）；国家重点研发计划基金资助项目（2018YFC1803104）；太湖水污染治理专项资金（第10期）科研课题基金资助项目（JSZC-G2016-198） |
|
| Toxicity Changes of Urban Black and Odorous River Sediment on Daphnia Magna Before and After Remediation |
|
PEI Zhou-tao,XU Rou-rou et al1,2
|
|
1.School of Energy & Environment, Southeast University, Nanjing,Jiangsu 210042,China;2.Southeast University Wuxi Campus,Wuxi,Jiangsu 214028
|
| Abstract: |
| Based on Daphnia magna acute toxicity test and immobilized sediment techlogy, the toxic changes of sediment in polluted rivers(Shengtongbang in Changzhou) before and after remediation were successfully determined, and more sensitive results were obtained than that of using leachate. The toxicity of the sediments at four locations were medium toxicity before remediation, but three of them decreased to little toxicity, and one of them was non toxic after remediation. According to the toxicity changes of sediments before and after river remediation to aquatic organisms, both the hazard degree before river restoration and the ecological safety after river restoration were evaluated, which could provide a scientific basis for adopting reasonable remediation methods to achieving long term treatment effects. |
| Key words: Whole sediment toxicity test Leachate Immobilized sediment Daphnia magna Acute toxicity Shengtongbang |
