Preparation and characterization of spherical lignocellulose-based anion exchanger from sugarcane bagasse

Biosorption is considered a promising technique for removing heavy metals from water. However, a biosorbent is usually prepared in the form of biomass powder that has drawbacks in stability and uniformity. Herein, a spherical lignocellulose-based anion exchanger (LCB-AE) was prepared from sugarcane...

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Bibliographic Details
Published inBioresources Vol. 17; no. 3; pp. 3984 - 4000
Main Authors Cao, Wei, Li, Hao, Hong, Yixia, Yang, Ziyi, Fu, Minglai
Format Journal Article
LanguageEnglish
Published Raleigh North Carolina State University 01.08.2022
Subjects
Adsorption
Ammonium
Anion exchanging
Anions
Bagasse
Biomass
Biosorption
Carbon 13
Cellulose
Dissolution
Experiments
Heavy metals
Hydroxyl groups
Lignocellulose
Mercury
NMR
Nuclear magnetic resonance
Photoelectron spectroscopy
Photoelectrons
Pollutants
Porosity
Raw materials
Regeneration
Rice
Scanning electron microscopy
Selectivity
Solvents
Structural analysis
Sugarcane
Water treatment
X ray photoelectron spectroscopy
China
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Summary:Biosorption is considered a promising technique for removing heavy metals from water. However, a biosorbent is usually prepared in the form of biomass powder that has drawbacks in stability and uniformity. Herein, a spherical lignocellulose-based anion exchanger (LCB-AE) was prepared from sugarcane bagasse through the method of dissolution-regeneration of biomass followed by quaternary ammonium modification. Dissolution-regeneration conditions of raw biomass were optimized, and the prepared materials were characterized by element composition analysis, pore-structure analysis (mercury intrusion porosimetry), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and carbon-13 nuclear magnetic resonance (13C-NMR) analyses. The LCB-AE has a macro-porous structure and a rough surface occupied mainly by quaternary ammonium and hydroxyl groups. Adsorption selectivity of LCB-AE follows the order of CrO42- > PO43- > SO42- > NO3-, and adsorption isotherms agree well with the Langmuir model, which suggests the experimental exchange abilities are approximately 0.8 to 0.9 mEq/g. These results show that LCB-AE as a new spherical biosorbent has the potential to be used for anions removal from water.
ISSN:1930-2126
1930-2126
DOI:10.15376/biores.17.3.3984-4000