Preparation, characterization, and adsorption performance of porous polyamine lignin microsphere

Yuxia Pang; Peiyi Lin; Zhengsong Chen; Mingsong Zhou; Dongjie Yang; Hongming Lou; Xueqing Qiu

doi:10.1016/j.ijbiomac.2023.127026

Preparation, characterization, and adsorption performance of porous polyamine lignin microsphere

Int J Biol Macromol. 2023 Dec 31;253(Pt 5):127026. doi: 10.1016/j.ijbiomac.2023.127026. Epub 2023 Sep 24.

Authors

Yuxia Pang¹, Peiyi Lin¹, Zhengsong Chen¹, Mingsong Zhou¹, Dongjie Yang¹, Hongming Lou², Xueqing Qiu³

Affiliations

¹ School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou, China.
² School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou, China; State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, China. Electronic address: cehmlou@scut.edu.cn.
³ School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China. Electronic address: qxq@gdut.edu.cn.

PMID: 37751818
DOI: 10.1016/j.ijbiomac.2023.127026

Abstract

In this study, a porous polyamine lignin microsphere (PPALM) was prepared through the inverse suspension polymerization combined with freeze-drying, during which sodium lignosulfonate and polyetheramine (PEA) were crosslinked with epichlorohydrin (ECH) as the cross-linker. By adjusting the amount of ECH and PEA, the optimized PPALM exhibited suitable crosslinking degree, ensuring a balance of framework flexibility and rigidity, thereby facilitating the formation of abundant and fine pores. PPALM demonstrated good mechanical properties comparable to commercial sulfonated polystyrene cationic resin, with a porosity of 61.12 % and an average pore size of 283.51 nm. The saturation adsorption capacity of PPALM for Pb²⁺ was measured to be 156.82 mg/g, and it remained above 120 mg/g after five cycles of regeneration. Particularly, the concentration of 50 mg/L Pb²⁺ solution could be reduced to 0.98 mg/L after flowing through the PPALM packed bed, indicating the great potential of PPALM for application in wastewater treatment.

Keywords: Adsorption; Lignin; Pb(2+); Porous microsphere; Suspension polymerization.

MeSH terms

Adsorption
Lead
Lignin*
Microspheres
Porosity
Water Pollutants, Chemical*

Substances

Lignin
Lead
Water Pollutants, Chemical