黄河沉积物对磷酸盐吸附的固体浓度效应研究

Effect of Solids Concentration on the Phosphorus Adsorption onto Yellow River Sediments

研究黄河沉积物对磷的吸附特征.用修改的Langmuir吸附模型将黄河沉积物对P的吸附数据进行有效拟合,通过吸附实验和模型计算得到描述黄河天然沉积物对P吸附特性的参数值.研究结果表明:黄河沉积物有向上覆水释放磷的倾向;沉积物对磷的吸附存在明显的固体浓度(Cs)效应,吸附滞后角随着Cs的增加而增大,在解吸过程中表现出一定的滞后性,即不可逆性.

Sorption behavior of phosphorus（P） on the Yellow River sediment was determined in laboratory.The modified Langmuir isotherm equation was used to describe phosphorus sorption on the Yellow River sediments and sorption parameter of phosphorus was subsequently obtained by the sorption experiment and corresponding model.The study results show that the sediment is a potential source of phosphate,P adsorption deceased significantly with the increase of solid concentration（particle concentration effect） and the desorption of P on Yellow River sediments was irreversible.