高州水库底泥磷吸附与解吸模拟研究

摘要

通过室内实验模拟高州水库底泥中磷的吸附与解吸过程,分别对比不同样点底泥和不同磷浓度上覆水对底泥磷释放和吸附的影响,研究了水库底泥中磷的吸附与解吸动态变化规律.结果表明:高州水库不同样点底泥对磷的吸附和解吸的动态平衡浓度为0.03 mg/L~0.05 mg/L,不同磷浓度上覆水底泥对磷的吸附和解析动态平衡浓度为0.05 mg/L.上覆水和底泥中磷含量的高低均会影响磷的吸附和解吸动态变化.底泥中磷含量与磷吸附速率成反比;上覆水中磷含量与磷吸附速率成正比关系.%The process of potential phosphorus(P)mobilization in Gaozhou Reservoir sediments was determined by P adsorption and release experiments, which was performed in different concentrations of total phosphorus(TP)in overlying water and different sediments.The results showed the equilibrium concentration of P adsorption and release was around 0.03 mg/L to 0.05 mg/L in different sediments and 0.05 mg/L in different concentrations of TP in overlying water.Potential phosphorus mobilization was both affected by different initial concentrations of P in overlying water and different sediments.Phosphorus adsorption rates increased with higher initial concentrations of P in overlying water and decreased with higher concentrations of P in sediments