A multifunctional gelatine-quaternary ammonium copolymer: An efficient material for reducing dye emission in leather tanning process by superior anionic dye adsorption

Shilin Xu; Xinlei Niu; Zhaosheng Hou; Chunhong Gao; Jianmei Lu; Yiyi Pang; Ming Fang; Yao Lu; Yujie Chen; Joshy K S; Tianduo Li; Jing Xu

doi:10.1016/j.jhazmat.2019.121142

A multifunctional gelatine-quaternary ammonium copolymer: An efficient material for reducing dye emission in leather tanning process by superior anionic dye adsorption

J Hazard Mater. 2020 Feb 5:383:121142. doi: 10.1016/j.jhazmat.2019.121142. Epub 2019 Sep 3.

Authors

Shilin Xu¹, Xinlei Niu¹, Zhaosheng Hou², Chunhong Gao¹, Jianmei Lu¹, Yiyi Pang¹, Ming Fang¹, Yao Lu¹, Yujie Chen¹, Joshy K S¹, Tianduo Li³, Jing Xu⁴

Affiliations

¹ Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, PR China.
² College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, 250100, PR China.
³ Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, PR China. Electronic address: litianduo@163.com.
⁴ Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, PR China. Electronic address: xujing@qlu.edu.cn.

PMID: 31639610
DOI: 10.1016/j.jhazmat.2019.121142

Abstract

Leather wastewater is one of the most polluting industrial emissions. The efficiency of wastewater remediation is limited by its complex composition. Herein, a novel strategy for designing modified gelatine with higher degree of quaternization (MG-2) is presented. The higher degree of quaternization allows sufficient adsorption of dyes in the tanning process. It is an in situ, environmentally friendly, and innovative strategy to limit dye emissions and can circumvent the subsequent waste management. Dyes such as Direct Purple N and Acid Black 24 could be adsorbed completely within 5 min by the MG-2 film formed from MG-2 solution. In addition, a remarkable efficiency in removing Acid Red 73, Golden Orange G, and Acid Orange II (>96.1% removal rates) was achieved within 30 min. The adsorption equilibrium data suggested that the adsorption capacity was positively correlated to the concentration of MG-2. When Acid Orange II and MG-2 were used in the industrial re-tanning process, the residual dye concentration in wastewater was only 23.1 mg L^-1, indicating that MG-2 is a promising re-tanning agent for adsorbing dyes in the leather tanning process.

Keywords: Dyes adsorption; In situ; Modified gelatine; Quaternary ammonium copolymer.

Publication types

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