Evaluation of acetanilide and antipyrine adsorption on lignin-derived activated carbons

被引:3
|
作者
Gutierrez, Maria del Carmen [1 ,3 ]
Garcia-Mateos, Francisco Jose [1 ]
Ruiz-Rosas, Ramiro [1 ]
Rosas, Juana Maria [1 ]
Rodriguez-Mirasol, Jose [1 ,2 ]
Cordero, Tomas
机构
[1] Univ Malaga, Fac Ciencias, Dept Ingn Quim, Andalucia Tech, Campus Teatinos S-N, Malaga 29010, Spain
[2] Univ Malaga, Escuela Ingn Ind, Dept Ingn Quim, Andalucia Tech, Campus Teatinos S-N, Malaga 29010, Spain
[3] Univ Cordoba, Dept Quim Inorganican Ingn Quim, Inst Quim Energia & Medioambiente IQUEMA, Area Ingn Quim,Campus Excelencia Int Agroalimentar, Carretera N-4,Km 396,Edificio Marie Curie, Cordoba 14071, Spain
关键词
Adsorption; Activated carbons; Lignin; Acetanilide; Antipyrine; Emerging pollutants; EMERGING CONTAMINANTS; AROMATIC-COMPOUNDS; SURFACE-DIFFUSION; WATER TREATMENT; REMOVAL; DEHYDRATION; POLLUTANTS; RESISTANCE; OXIDATION; CATALYSTS;
D O I
10.1016/j.envres.2024.118918
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In this study, the removal of two emerging pollutants (EPs), antipyrine and acetanilide, through adsorption on activated carbons (ACs) prepared by chemical activation of Organosolv lignin with H3PO4 were evaluated. ACs with different pore size distribution were obtained at different impregnation ratios (H3PO4/lignin, 0.5-3.0 w/w) and activating temperatures (500-900 degrees C). The porosity and surface chemistry of the ACs were determined, and a bimodal size distribution of micropores and narrow mesopores was observed for the different ACs. These ACs were tested for antipyrine and acetanilide adsorption in aqueous solutions in a batch system at 20 degrees C and low concentration levels (0.5-10 ppm). In general, the ACs exhibited higher adsorption affinity to acetanilide than to antipyrine due to its smaller molecular size. Langmuir adsorption isotherm was able to describe the adsorption equilibrium data. A new Linear Driving Force (2-LDF) kinetic model, based on the bimodal size distribution of micropores and narrow mesopores observed for the ACs has been developed. The new model provided a more accurate description of the batch adsorption rates than that obtained from conventional kinetic models, and also enabled to relate the pore size distribution of the adsorbent with the adsorption kinetics. The validity of this model was checked in small-scale column fixed bed adsorption for the AC showing the highest affinity for both EP. The kinetic model and equilibrium adsorption isotherm obtained from the batch experiments were successfully used to provide an accurate description of the bed service time and the full breakthrough profile of acetanilide and antipyrine.
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页数:12
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