Abstract：
:Wastewater contaminated with dyes is discharged by huge amount daily, and involved many hazardous materials. Thus, this study focused on introducing low cost, ecofriendly and available removal agent (lignin-based adsorbent). Three adsorbents, APKL-4, APKL-5 and APKL-6 were obtained using gradient acid precipitation technology and used for methylene blue (MB) removal. The samples were characterized by SEM, FT-IR and zeta potential analyzer. The results indicated that the three adsorbents exhibit significantly different adsorption behavior due to the structural differences caused by fractionation. The APKL-5 and APKL-6 have fewer hydrophilic groups in their molecules and thus have more adsorption active sites to load MB molecules. A pore structure inside of APKL-5 molecules is form in acid fractionation, which allows it to carry more MB molecules. The adsorption capacity of APKL-5 increased 3.8 times (from 345 to 1310 mg g-1) in the alkaline solution which showing excellent pH responsiveness. This paper presents a new promising approach for preparing high efficiency, low cost and eco-friendly adsorbents and builds a foundation for developing further applications of lignin-based adsorbents.
journal_name
Int J Biol Macromoljournal_title
International journal of biological macromoleculesauthors
Li H,Yuan Z,Shang X,Shang H,Liu J,Darwesh OM,Li C,Fang Jdoi
10.1016/j.ijbiomac.2020.12.206subject
Has Abstractpub_date
2020-12-31 00:00:00pages
10-18eissn
0141-8130issn
1879-0003pii
S0141-8130(20)35386-1journal_volume
172pub_type
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journal_title：International journal of biological macromolecules
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journal_title：International journal of biological macromolecules
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journal_title：International journal of biological macromolecules
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