A biomass-assembled macro/meso-porous nano-scavenger for Hg ion trapping. (26th August 2021)

• Record Type: Journal Article
• Authors: Xia, Nan Nan; Zhang, Bingbing; Hu, Zi Hao; Kong, Fangong; Xu, Guomin; He, Fei
• Is Part Of: New journal of chemistry. Volume 45:Number 36(2021)
• Page Start: 17002
• Page End: 17008
• Publication Date: 2021-08-26
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d1nj02877d
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Simple self-assembling functional biomass to fabricate porous supramolecular networks for efficient removal of Hg ions. Abstract : It is desirable to develop a sustainable Hg ion scavenger, which features a high adsorption capacity, fast adsorption kinetics, as well as robust stability and excellent recyclability, but it remains a challenge. Herein, we constructed a bio-based Hg 2+ nano-scavenger via the electrostatic interaction and hydrogen bonding driven supramolecular self-assembly of natural lignosulfonate (LS), chitosan (CTS) and tannin (TA). The intermolecular interaction enabled the formation of a supramolecular nano-network with a high surface area and abundant macro/meso-porosities, which greatly promoted the exposure of adsorption sites and the fast transport of Hg 2+ from the solution environment to these adsorption sites. Consequently, LS–CTS–TA achieved a maximum adsorption capacity of 95.24 mg g −1 and followed the Langmuir isotherm model with a characteristic pseudo-second-order kinetics during removal of high concentration Hg. Furthermore, such a robust and heterogeneous nano-network structure of LS–CTS–TA exhibited a high removal efficiency for low concentration mercury and good regeneration ability.