Study on Fluoride Removal from Aqueous Solutions by a Novel Defluoridation Adsorbent NEWDEF?

2016 International Conference on Environmental Engineering and Sustainable Development

生态环境科学;经济学

Zhu, Chi^1,2 ; Wang, Shui^1 ; Cai, An-Juan^1 ; Wang, Dong^1 ; Wang, Wei-Xia^1 ; Zhu, Jia-Ming^3 ; Nong, Kai^3

Jiangsu Provincial Academy of Environmental Science, Jiangsu Provincial Key Laboratory of Environmental Engineering, Nanjing

210036, China^1

State Key Laboratory of Lake and Environmental Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing

210008, China^2

China School of Chemistry Life Science, Nanjing University, Jinling College, Nanjing

210089, China^3

关键词: Adsorption capacities;    Adsorption kinetics and isotherm;    Adsorption process;    Endothermic process;    First order equations;    Langmuir isotherm models;    Monolayer adsorption;    Pseudo second order kinetics;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/51/1/012022/pdf
DOI  :  10.1088/1742-6596/51/1/012022

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Batch experiment was carried out to determine the effectiveness of the novel composite defluorinating agent NEWDEF®for fluoride removal from aqueous solution. The results showed that the maximum adsorption capacities for F-were 4.09mg•g-1. Kinetics data obtained for the adsorption process fitted the Lagergren First-order equation. The adsorption kinetics and isotherm were found well fitted by Langmuir isotherm models and a pseudo-second-order kinetic, showing F-removal belonged to monolayer adsorption process. The reaction of F-adsorption from aqueous solutions by NEWDEF®was an endothermic process. Micro-columnand home-used equipment defluoridation test indicated that NEWDEF®can be perfectly suitable defluorinating agent in F-removal for drinking water in small towns.