氢氧化镧对磷酸根吸附性能的研究
Study on Adsorption Performance for Phosphate of Lanthanum Hydroxide
曲君 1刘彦琳 1王原1
作者信息
- 1. 辽宁工业大学化学与环境工程学院,辽宁锦州 121001
- 折叠
摘要
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.
Abstract
The research was carried out to get the adsorption capacity of La(OH)3and 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 12h. 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.
关键词
除磷/吸附剂/氢氧化镧Key words
phosphorus removal/adsorbent/lanthanum hydroxide引用本文复制引用
出版年
2018
NETL
NSTL
维普
万方数据