吸附
碳化
木质素
碳纤维
盐酸四环素
化学
废水
生物炭
化学工程
材料科学
核化学
有机化学
复合数
四环素
复合材料
废物管理
热解
工程类
生物化学
抗生素
作者
Da Li,Wenyi Gu,Liang Zhou,Juying Lei,Lingzhi Wang,Jinlong Zhang,Yongdi Liu
标识
DOI:10.1016/j.seppur.2022.122217
摘要
Using MOFs MIL-101-NH2 (Fe) mixed with lignin uniformly as precursors, Carbon-Fe3C/lignin composites were prepared by carbonization for efficient adsorption removal of tetracycline (TC) from wastewater. The doping of lignin in MOFs MIL-101-NH2 (Fe) increased the BET surface area (160.9 m2/g) of the obtained porous carbon materials, made Fe nanoparticles more dispersed on carbon matrix, and brought more defects and oxygen-containing groups as active adsorption sites. As a result, the materials had excellent adsorption performance for TC in a wide pH range, and the maximum adsorption capacity reached 760.36 mg/g when pH was 4.19, which was 2 times higher than that of Carbon-MIL-101-NH2. The mechanism investigation revealed that the adsorption mainly included chemical adsorption (chemical bonds, ion exchange, π-π interaction and electrostatic interaction) and physical adsorption. It was found that the materials also had a good adsorption effect on tetracycline hydrochloride, oxytetracycline and chlortetracycline (>350 mg/g) and heavy metal Cr(VI) (164 mg/g). Significantly, adsorbent had excellent cycle stability and can be easily recovered from water through magnetic separation, ensuring its great potential for practical wastewater treatment.
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