摘要
以江阴城区河道沉积物为研究对象,选取6条河道,设置6个检测点,通过84组吸附(解吸)试验研究了沉积物的氮、磷吸附(解吸)等温线特征。结果表明:在试验浓度范围内,沉积物的氮、磷吸附(解吸)等温线呈显著相关;沉积物对氨氮的吸附(解吸)平衡浓度为1.58~3.33 mg/L,对磷的吸附(解吸)平衡浓度为0.02~0.58 mg/L;沉积物对氨氮的本底吸附量为48.784~75.684 mg/kg,对磷的本底吸附量为1.0706~37.270 mg/kg;沉积物对氨氮的吸附效率为17.627~40.599 L/kg,对磷的吸附效率为54.048~95.559 L/kg。各河道沉积物对氮、磷的吸附能力均差别不大。
Taking the sediments in the river channel of Jiangyin City as the research object,6 monitoring points in 6 rivers were set up,and the adsorption(desorption)isotherms curves were studied through 84 set of adsorption(desorption)experiments.The results showed that the nitrogen and phosphorus adsorption(desorption)isotherms of the sediments were significantly correlated within the experimental concentration range;the adsorption(desorption)equilibrium concentration of the sediment to nitrogen and phosphorus were 1.58-3.33 mg/L and 0.02-0.58 mg/L respectively;the background adsorption of nitrogen and phosphorus are 48.784-75.684 mg/kg and 1.0706-37.270 mg/kg respectively;the adsorption efficiency of nitrogen and phosphorus were 17.627-40.599 L/kg and 54.048-95.559 L/kg,respectively.The sediment adsorption capacity of nitrogen and phosphorus in each channel was not much different.
作者
朱锐
李林泽
刘飞
ZHU Rui;LI Linze;LIU Fei(Lower Changjiang River Bureau of Hydrological and Water Resources Survey,Bureau of Hydrology,Changjiang Water Resources Commission,Nanjing 210011,China)
出处
《水利水电快报》
2020年第7期49-53,共5页
Express Water Resources & Hydropower Information
关键词
河道沉积物
吸附
解吸
氮
磷
江阴城区
sediment in the river channel
adsorption
desorption
nitrogen
phosphorus
Jiangyin City
