氢氧化镧对磷酸根吸附性能的研究

Study on Adsorption Performance for Phosphate of Lanthanum Hydroxide

本研究以La(OH)3作为研究对象,考察其吸附容量和影响其吸附效率的因素;分别对磷初始浓度、pH、吸附温度和吸附时间进行考察,并确定最佳的吸附条件。该吸附剂的吸附容量随pH变化显著,在pH值=3附近达最大值;最佳的磷初始浓度是100 mg/L;在12h达到最大吸附容量,之后无明显变化。吸附等温线较符合Langmuir方程,吸附剂吸附属于单分子层吸附;其动力学模型较符合伪二级动力学方程。

The research was carried out to get the adsorption capacity of La(OH)_3 and the factors affecting its adsorption efficiency were observed.The initial concentration,pH,adsorption temperature and adsorption time were investigated.And finally the optimum adsorption conditions were obtained.The adsorption capacity of the adsorbent changed significantly with pH and reached the maximum at pH=3.The optimum initial concentration of phosphorus was 100 mg/L,its maximum adsorption capacity reached at 12 h,and then no significant change after 12 h.The adsorptive isotherm is superior to Langmuir equation,and the adsorbent adsorption belongs to the adsorption of monomolecular layer.Its kinetic model is more suitable for pseudo-second-order kinetics equation.