Removal of heavy metal ions by magnetic chitosan nanoparticles prepared continuously via high-gravity reactive precipitation method

Hong-Lei Fan; Shao-Feng Zhou; Wei-Zhou Jiao; Gui-Sheng Qi; You-Zhi Liu

doi:10.1016/j.carbpol.2017.07.050

Removal of heavy metal ions by magnetic chitosan nanoparticles prepared continuously via high-gravity reactive precipitation method

Carbohydr Polym. 2017 Oct 15:174:1192-1200. doi: 10.1016/j.carbpol.2017.07.050. Epub 2017 Jul 18.

Authors

Hong-Lei Fan¹, Shao-Feng Zhou², Wei-Zhou Jiao³, Gui-Sheng Qi³, You-Zhi Liu⁴

Affiliations

¹ Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan 030051, PR China. Electronic address: whutfanfan@163.com.
² Shanxi Province Key Laboratory of Functional Nanocomposites, North University of China, Taiyuan 030051, PR China.
³ Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan 030051, PR China.
⁴ Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan 030051, PR China. Electronic address: lyzzhongxin@126.com.

PMID: 28821044
DOI: 10.1016/j.carbpol.2017.07.050

Abstract

This study aimed to provide a continuous method for the preparation of magnetic Fe₃O₄/Chitosan nanoparticles (Fe₃O₄/CS NPs) that can be applied to efficient removal of heavy metal ions from aqueous solution. Using a novel impinging stream-rotating packed bed, the continuous preparation of Fe₃O₄/CS NPs reached a theoretical production rate of 3.43kg/h. The as-prepared Fe₃O₄/CS NPs were quasi-spherical with average diameter of about 18nm and saturation magnetization of 33.5emu/g. Owing to the strong metal chelating ability of chitosan, the Fe₃O₄/CS NPs exhibited better adsorption capacity and faster adsorption rates for Pb(II) and Cd(II) than those of pure Fe₃O₄. The maximum adsorption capacities of Fe₃O₄/CS NPs for Pb(II) and Cd(II) were 79.24 and 36.42mgg^-1, respectively. In addition, the Fe₃O₄/CS NPs shown excellent reusability after five adsorption-desorption cycles. All the above results provided a potential method for continuously preparing recyclable adsorbent with a wide prospect of application in wastewater treatment.

Keywords: Chitosan; Fe(3)O(4) nanoparticles; Heavy metal removal; High-gravity reactive precipitation method.