Removal of cadmium and lead ions from water by sulfonated magnetic nanoparticle adsorbents

Kai Chen; Junyong He; Yulian Li; Xingguo Cai; Kaisheng Zhang; Tao Liu; Yi Hu; Dongyue Lin; Lingtao Kong; Jinhuai Liu

doi:10.1016/j.jcis.2017.01.082

Removal of cadmium and lead ions from water by sulfonated magnetic nanoparticle adsorbents

J Colloid Interface Sci. 2017 May 15:494:307-316. doi: 10.1016/j.jcis.2017.01.082. Epub 2017 Jan 24.

Authors

Kai Chen¹, Junyong He¹, Yulian Li¹, Xingguo Cai¹, Kaisheng Zhang², Tao Liu¹, Yi Hu¹, Dongyue Lin², Lingtao Kong³, Jinhuai Liu²

Affiliations

¹ Nano-Materials and Environmental Detection Laboratory, Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, People's Republic of China; Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
² Nano-Materials and Environmental Detection Laboratory, Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, People's Republic of China.
³ Nano-Materials and Environmental Detection Laboratory, Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, People's Republic of China. Electronic address: ltkong@iim.ac.cn.

PMID: 28161502
DOI: 10.1016/j.jcis.2017.01.082

Abstract

A new adsorbent, Fe₃O₄ sulfonated magnetic nanoparticle (Fe₃O₄-SO₃H MNP), was developed for heavy metal ions removal from water, which could be effectively separated from the solution owing to the superparamagnetic property. The nanoparticles can be used to remove heavy metal ions due to the additional active site, "sulfo-group", introduced by the AMPS branches grafted onto the iron oxide. The as-synthesized materials were characterized by SEM, TEM, FT-IR and BET. The FTIR, XPS and Zeta potential were used to describe the adsorption mechanism. The Fe₃O₄-SO₃H MNPs showed rapid removal for Pb²⁺ and Cd²⁺ with maximum of adsorption capacity of 108. 93 and 80.9mg/g at 25°C, respectively. The adsorption isotherms for Pb²⁺ and Cd²⁺ fitted better with Langmuir than Freundlich models, indicated that the processes of the removal of Pb²⁺ and Cd²⁺ could follow a kind of similar adsorption manner. The adsorption kinetic was consistent with pseudo-second-order model. Furthermore, the reuse experiments results showed the adsorbent might have potential in treating heavy metal ions pollution in water.

Keywords: Adsorption; Cadmium ion; Lead ions; Magnetic nanoadsorbent.

Publication types

Research Support, Non-U.S. Gov't