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ABSTRACT
Hypercrosslinked functionalized lignosulfonates (CLS) were prepared by Friedel–Crafts alkylation reaction. The structure of CLS without introducing any functional groups and the according adsorption behaviors of Pb(II) were characterized and studied, respectively. Due to increase of specific surface area and abundance exposure of binding sites, the maximum adsorption capacity of CLS was found to be as high as 74.45 mg/g, which was about seven times that of raw lignin. The results provide a new feasible synthesis method for preparing lignin-based materials with porous structures and promising application for the removal of heavy metal ions from wastewater.
Additional information
Funding
This study was kindly supported by the National Natural Science Foundation of China [No. 51703202, 51473148, and 21673208], Key Research and Development Program of Science and Technology Department of Zhejiang Province [No. 2018C03004], Zhejiang Provincial Nature Science Foundation of China and Public Technology Research Program of Zhejiang Province [No. GF18B070005 and GG19E030032], Zhejiang Provincial Top Key Academic Discipline of Chemical Engineering and Technology of Zhejiang Sci-Tech University (No. ZYG2017002).