期刊
BIOCHAR
卷 4, 期 1, 页码 -出版社
SPRINGER SINGAPORE PTE LTD
DOI: 10.1007/s42773-021-00128-9
关键词
Corncob xylose residue; Biochar; Sulfamethoxazole; Adsorption behavior; Adsorption mechanism
资金
- National Key Research and Development Program of China [2017YFA0207201]
- National Natural Science Foundation of China [2197020577]
An alkali active porous biochar was prepared from corncob xylose residue to remove antibiotics from waste water. The biochar possessed a large specific surface area, developed pore structure, and abundant oxygen functional groups, which resulted in quick and efficient adsorption performance.
To remove antibiotics from waste water, an alkali active porous biochar, 850BC, was prepared from corncob xylose residue. In preparation, NaOH dipping was used for silicon removal and KOH activation was operated at 850 degrees C. Further characterization containing BET, SEM, and FTIR were confirmed. 850BC possessed a huge specific surface area of 3043 m(2).g(-1), developed pore structure and abundant oxygen functional groups. The adsorption performance of sulfamethoxazole on 850BC was quick and efficient, and the adsorption capacity reached 1429 mg.g(-1), which was significantly higher than other adsorbents reported previously. While pseudo-second-order kinetic model and Langmuir model could better describe the adsorption, chemisorption dominated the SMX adsorption onto 850BC. In virtue of pore-filling and pi-pi interaction as major mechanism, a large surface area and rich oxygen-containing functional groups led to an excellent adsorption performance. Thus, this preparation method provided a biochar-based adsorbent with enhanced specific surface for efficient removal of antibiotic pollutants. [GRAPHICS] .
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