Preparation and characterization of cellulose-based adsorbent and its application in heavy metal ions removal

Jian Wang; Min Liu; Chao Duan; Jianpeng Sun; Yaowei Xu

doi:10.1016/j.carbpol.2018.11.059

Preparation and characterization of cellulose-based adsorbent and its application in heavy metal ions removal

Carbohydr Polym. 2019 Feb 15:206:837-843. doi: 10.1016/j.carbpol.2018.11.059. Epub 2018 Nov 20.

Authors

Jian Wang¹, Min Liu², Chao Duan³, Jianpeng Sun³, Yaowei Xu³

Affiliations

¹ College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi'an, 710021, China; National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi'an, 710021, China.
² College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi'an, 710021, China. Electronic address: 971932434@qq.com.
³ College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi'an, 710021, China.

PMID: 30553391
DOI: 10.1016/j.carbpol.2018.11.059

Abstract

In this work, we develop a facile route to prepare a cellulose-based adsorbent, namely carboxymethylated cellulose fiber (CMF), for the water purification. The as-prepared CMF bio-adsorbent was synthesized via a controllable carboxymethylation modification in the case of maintaining inherent fibrous framework. The CMF bio-adsorbent was applied to adsorb the heavy metal ions, such as Cu(II) and Ni(II), from aqueous solution. Results showed that the CMF adsorbent exhibited excellent adsorption capacity toward these ions and a higher selectivity for the Cu(II) removal based on surface complexation and electrostatic interaction mechanisms. Besides, the adsorption isotherm of Cu(II) fitted better with the Langmuir isotherm model. Moreover, the relationship between the charges and adsorption capacity of CMF to Cu(II) revealed that the enhanced adsorption capacity of CMF adsorbent can mainly attributed to its increased inner charges rather than surface charges, which can provide a new strategy for the further modification of cellulose-based adsorbent.

Keywords: Adsorption; Bio-adsorbent; Carboxymethylated cellulose fiber (CMF); Charge; Heavy metal ions.