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Preparation of Lignin-based High Efficiency Dye Adsorption Materials and Their Performance
Received:April 07, 2024  
DOI：10.11980/j.issn.0254-508X.2024.07.010
Key Words:alkali lignin  adsorbent  methylene blue  methyl orange  adsorption isotherm model
Fund Project:国家自然科学基金项目（22278035）。
Author NameAffiliationPostcode
WEN Mohan Beijing Key Lab of Lignocellulosic Chemistry， Beijing Forestry University， Beijing， 100083 100083
XU Xin Beijing Key Lab of Lignocellulosic Chemistry， Beijing Forestry University， Beijing， 100083 100083
LI Lijun Beijing Key Lab of Lignocellulosic Chemistry， Beijing Forestry University， Beijing， 100083 100083
HUANG Jianbo China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102 100102
ZHANG Xueming* Beijing Key Lab of Lignocellulosic Chemistry， Beijing Forestry University， Beijing， 100083 100083
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Abstract:The industrial alkali lignin was subjected to co-activation treatment with ZnCl2， KOH， urea， and lignin-based adsorption material with high adsorption capacity （Zn-LB）was prepared by high temperature carbonization（700 ℃）. The prepared material was used in adsorption experiments with methylene blue and methyl orange dyes to explore the effects of dye type， adsorption temperature， and a multi-component dye system on the adsorption capacity of Zn-LB. The results showed that the specific surface area of the prepared Zn-LB samples reached 2 190.3 m2/g. The maximum equilibrium adsorption capacities of Zn-LB for methylene blue and methyl orange， as fitted through the Langmuir adsorption isotherm model， were 1 345.9 and 1 732.4 mg/g， respectively. Additionally， the adsorption capacity for methylene blue increased with increasing temperature， indicating that the adsorption of methylene blue was an endothermic process. Conversely， the adsorption capacity for methyl orange decreased with rising temperature， suggesting an exothermic process.
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