腐植酸保水剂吸附氮磷特性研究

以硫酸铵代替氮、以磷酸氢二钾代替磷，采用静态吸附法测定自制腐植酸保水剂吸附对氮／磷的吸附量；改变铵根离子和磷酸根离子浓度绘制吸附等温线，并采用几种模型对等温吸附数据进行拟合，确立了其等温吸附模型。结果表明：自制腐植酸保水剂对铵根离子或磷酸根离子具有很大的吸附容量，磷酸氢二钾浓度小于18g/L、硫酸铵浓度小于10g／L的范围内，吸附量随浓度的升高快速增加。该保水剂对硫酸铵的等温吸附在0-10g／L范围内较好的符合平方曲线模型，而磷酸氢二钾浓度在0-18g／L范围内对磷酸根的吸附更好的符合直线模型。

Study on the Adsorption of Nitrogen and Phosphorus on Humic Acid Superabsorbent Polymer

The adsorption characteristics of nitrogen （ （NH4）2SO4 instead of nitrogen） and phosphorus （KH2PO4 instead of phosphorus） on humic acid superabsorbent polymer by self-made were tested by static adsorption method; and draw adsorption isotherms through changing ammonium and phosphate ions concentration. That data wre fit to using several isotherm adsorption model. The results show that the humic acid superabsorbent polymer has great adsorption capacity for ammonium and phosphate ions. at 0-18g/L, the adsorption amount increases quickly with the increasing concentration; （NH4 ）2SO4 concentration at 0-10g/L, isotherm adsorption model consistent with the square curve model; and KH2PO4 concentration at 0 -18g/L, that of phosphate consistents linear equation.