吸附
介孔材料
微型多孔材料
化学
化学工程
木质素
土霉素
磷酸
氢键
工业废水处理
解吸
废水
无机化学
有机化学
催化作用
分子
废物管理
工程类
生物化学
抗生素
作者
Hanjun Zhou,Guangjia Jiao,Xianzhen Li,Chunli Gao,Yiru Zhang,Dana Hashan,Jing Liu,Diao She
标识
DOI:10.1016/j.ijbiomac.2023.123689
摘要
In this study, an adsorbent with mesoporous structure and PO/PO bonds is prepared by hydrothermal and phosphoric acid activation from industrial alkali lignin for the adsorption of oxytetracycline (OTC). The adsorption capacity is 598 mg/g, which is three times higher than that of the adsorbent with microporous structure. The rich mesoporous structure of the adsorbent provides adsorption channels and filling sites, and π-π attraction, cation-π interaction, hydrogen bonds, and electrostatic attraction provide adsorption forces at the adsorption sites. The removal rate of OTC exceeds 98 % over a wide range of pH values (3-10). It has high selectivity for competing cations in water, with higher than 86.7 % removal rate of OTC from medical wastewater. After 7 consecutive adsorption-desorption cycles, the removal rate of OTC remains as high as 91 %. This efficient removal rate and excellent reusability indicate the strong potential of the adsorbent for industrial applications. This study prepares a highly efficient, environmentally friendly antibiotic adsorbent that can not only efficiently remove antibiotics from water but also recycle industrial alkali lignin waste.
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