吸附
环氧氯丙烷
阳离子聚合
悬浮聚合
聚苯乙烯
木质素
化学工程
多孔性
化学
聚合物
聚合
材料科学
高分子化学
核化学
有机化学
工程类
作者
Yuxia Pang,Peiyi Lin,Zhengsong Chen,Mingsong Zhou,Dongjie Yang,Hongming Lou,Xueqing Qiu
标识
DOI:10.1016/j.ijbiomac.2023.127026
摘要
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.
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