摘要
底泥疏浚是富营养化湖库内源污染治理的一项重要措施,迄今已在众多浅水湖库治理中得到应用。深水水库是我国水资源利用的重要形式,但其水深大、湖底地形复杂、疏浚难度高,因此在深水水库实施疏浚工程的研究报道很少。评估了典型深水水库(阿哈水库)底泥疏浚工程对内源污染的影响。结果表明:1)疏浚后实验区底泥主要污染物含量(TP、TN、OC、TS、Fe和Mn)平均降低了56.7%,孔隙水中主要污染物浓度(TP、TN、Fe和Mn)平均降低了71.2%,实验区底泥纳污能力明显提高;2)疏浚后,实验区底泥磷形态中活性组分含量和底泥孔隙水中活性磷浓度(DGT-liable P)明显下降,降低了实验区底泥污染物的"二次释放"风险。
Sediment dredging was an important measure to control the internal pollution of lakes and reservoirs, and successfully applied in many shallow waters. Deep water reservoir is an important water resources in China,with high water depth,complicated lake bottom topography and relatively high dredging difficulty. Therefore,dredging projects were seldom implemented in the deep water reservoirs. This study evaluated the effect of dredging on the sediment pollution in Aha Reservoir,a typical deep water reservoir in Southwest China. The results showed that： 1） After dredging,the contents of main pollutants（ TP,TN,OC,TS,Fe,and Mn） in sediment of the dredging area decreased by 56. 7% on average,and the concentrations of main pollutants（ TP,TN,Fe,and Mn） in pore water decreased by an average of 71. 2%,obviously improving the capacity of accommodating pollutants in this area; 2） The contents of active phosphorus components in sediments and the concentrations of active phosphorus（ DGT-liable P） in pore water decreased significantly,reducing the environmental risk of internal loading of sedimentary contaminants.
作者
王敬富
陈敬安
孙清清
余萍萍
杨海全
WANG Jing-fu1 , CHEN Jing-an , SUN Qing-qing1＇2 , YU Ping-ping3 , YANG Hai-quanl(1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China; 3. College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, Chin)
出处
《环境工程》
CAS
CSCD
北大核心
2018年第3期69-73,147,共6页
Environmental Engineering
基金
贵州省应用基础研究计划重大项目([2015]2001)
贵州省科技计划项目([2016]2802)
