title: Development of a nanosphere adsorbent for the removal of fluoride from water.
abstract: A new uniform-sized CeCO3OH nanosphere adsorbent was developed, and tested to establish its efficiency, using kinetic and thermodynamic studies, for fluoride removal. The results demonstrated that the CeCO3OH nanospheres exhibited much high adsorption capacities for fluoride anions due to electrostatic interactions and exchange of the carbonate and hydroxyl groups on the adsorbent surface with fluoride anions. Adsorption kinetics was fitted well by the pseudo-second-order model as compared to a pseudo-first-order rate expression, and adsorption isotherm data were well described by Langmuir model with max adsorption capacity of 45mg/g at pH 7.0. Thermodynamic examination demonstrated that fluoride adsorption on the CeCO3OH nanospheres was reasonably endothermic and spontaneous. Moreover, the CeCO3OH nanospheres have less influence on adsorption of F(-) by pH and co-exiting ions, such as SO4(2-), Cl(-), HCO3(-), CO3(2-), NO3(-) and PO4(3-), and the adsorption efficiency is very high at the low initial fluoride concentrations in the basis of the equilibrium adsorption capacities. This study indicated that the CeCO3OH nanospheres could be developed into a very viable technology for highly effective removal of fluoride from drinking water.
authors.affiliation: Nano-Materials and Environmental Detection Laboratory, Hefei Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, PR China.
authors.forename: Kaisheng
authors.initials: K
authors.lastname: Zhang
authors.affiliation: Nano-Materials and Environmental Detection Laboratory, Hefei Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China.
authors.forename: Shibiao
authors.initials: S
authors.lastname: Wu
authors.affiliation: Nano-Materials and Environmental Detection Laboratory, Hefei Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, PR China.
authors.forename: Junyong
authors.initials: J
authors.lastname: He
authors.affiliation: Nano-Materials and Environmental Detection Laboratory, Hefei Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, PR China.
authors.forename: Liang
authors.initials: L
authors.lastname: Chen
authors.affiliation: Nano-Materials and Environmental Detection Laboratory, Hefei Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, PR China.
authors.forename: Xingguo
authors.initials: X
authors.lastname: Cai
authors.affiliation: Nano-Materials and Environmental Detection Laboratory, Hefei Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, PR China.
authors.forename: Kai
authors.initials: K
authors.lastname: Chen
authors.affiliation: Nano-Materials and Environmental Detection Laboratory, Hefei Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, PR China.
authors.forename: Yulian
authors.initials: Y
authors.lastname: Li
authors.affiliation: Nano-Materials and Environmental Detection Laboratory, Hefei Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China.
authors.forename: Bai
authors.initials: B
authors.lastname: Sun
authors.affiliation: Nano-Materials and Environmental Detection Laboratory, Hefei Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China.
authors.forename: Dongyue
authors.initials: D
authors.lastname: Lin
authors.affiliation: Bureau of Cultivated Land Protection, Sheyang, Jiangsu 224300, PR China.
authors.forename: Guqing
authors.initials: G
authors.lastname: Liu
authors.affiliation: Nano-Materials and Environmental Detection Laboratory, Hefei Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China. Electronic address: ltkong@iim.ac.cn.
authors.forename: Lingtao
authors.initials: L
authors.lastname: Kong
authors.affiliation: Nano-Materials and Environmental Detection Laboratory, Hefei Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China.
authors.forename: Jinhuai
authors.initials: J
authors.lastname: Liu
keywords: Adsorption; Carbonate; CeCO(3)OH nanospheres; Fluoride