Toxic Cr removal from aqueous media using catechol-amine copolymer coating onto as-prepared cellulose

Tao Hu; Qiang Liu; Qinze Liu; Yang Wu; Congde Qiao; Jinshui Yao

doi:10.1016/j.carbpol.2019.01.046

Toxic Cr removal from aqueous media using catechol-amine copolymer coating onto as-prepared cellulose

Carbohydr Polym. 2019 Apr 1:209:291-298. doi: 10.1016/j.carbpol.2019.01.046. Epub 2019 Jan 15.

Authors

Tao Hu¹, Qiang Liu², Qinze Liu³, Yang Wu⁴, Congde Qiao¹, Jinshui Yao¹

Affiliations

¹ School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, PR China.
² Department of Chemistry, School of Science, Tianjin University and the National Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, PR China.
³ School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, PR China; State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China. Electronic address: liuqinze@qlu.edu.cn.
⁴ State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China.

PMID: 30732811
DOI: 10.1016/j.carbpol.2019.01.046

Abstract

Green composite adsorbent with low cost and high efficiency towards toxic Cr(VI) removal from the polluted water has a broad application prospect. In this work, a mussel-inspired Cr-adsorbent namely poly(catechol tetraethylenepentamine-p-phenylenediamine)@as-prepared cellulose (PAC@AC) is successful fabricated via catechol-amine copolymer adhering onto as-prepared cellulose (AC). The detailed characterizations of product are run with SEM, FT-IR, TGA, XRD, EDS and XPS analysis. Many factors are investigated to affect the adsorption of Cr(VI) by PCA@AC, including ratio of AC to PCA, adsorbent dosage, contact time, initial Cr(VI) concentration, pH, temperature and exterior ions. The maximum adsorption capacity of PCA@AC for Cr (VI) is obtained by 507.61 mg/g at 30°C using Langmuir model, which is very higher than the pure AC. The removal ability of PCA@AC is ascribed to the electrostatic interaction and reduction reaction of Cr(VI) to Cr(III) during the adsorption process. In addition, the adsorption process is spontaneous and endothermic, not require any external energy. The composite adsorbent (PCA@AC) has great potential for Cr(VI)-wastewater purification with an excellent chelating ability.

Keywords: Catechol-amine copolymer; Cellulose; Composite adsorbent; Cr(VI) removal.