Comparison of methods for activating sesame stalk lignin biochar for removing benzo[a]pyrene from sesame oil

文献类型： 外文期刊

第一作者： Qin, Zhi

作者： Qin, Zhi;Yang, Qiao-Li;Fan, Wei;Fei, Jia-Lin;Qin, Zhao;Liu, Hua-Min;Wang, Xue-De;Qin, Zhi;Yang, Qiao-Li;Fan, Wei;Fei, Jia-Lin;Qin, Zhao;Liu, Hua-Min;Wang, Xue-De;Mei, Hong-Xian;Wang, Ying-Ge;Yuan, Jing-Yang

作者机构：

关键词： Lignin-based biochar; Activation; ZnCl2; Benzo[a]pyrene; Adsorption mechanism

期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：8.2； 五年影响因子：7.8 ）

ISSN： 0141-8130

年卷期： 2024 年 266 卷

页码：

收录情况： SCI

摘要： In this study, three activators and two activation methods were employed to activate sesame lignin -based biochar. The biochar samples were comprehensively characterized, their abilities to adsorb benzo[ a ]pyrene (BaP) from sesame oil were assessed, and the mechanism was analyzed. The results showed that the biochar obtained by one-step activation was more effective in removing BaP from sesame oil than the biochar produced by twostep activation. Among them, the biochar generated by one-step activation with ZnCl 2 as the activator had the largest specific surface area (1068.8776 m 3 /g), and the richest mesoporous structure (0.7891 m 3 /g); it removed 90.53 % of BaP from sesame oil. BaP was mainly adsorbed by the mesopores of biochar. Mechanistically, porefilling, pi- pi conjugations, hydrogen bonding, and n- pi interactions were involved. The adsorption was spontaneous and heat-absorbing. In conclusion, the preparation of sesame lignin biochar using one-step activation with ZnCl 2 as the activator was found to be the best for removing BaP from sesame oil. This biochar may be an economical adsorbent for the industrial removal of BaP from sesame oil.

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