Effects of different precursors on the structure of lignin-based biochar and its ability to adsorb benzopyrene from sesame oil

文献类型： 外文期刊

第一作者： Xua, Shuai

作者： Xua, Shuai;Zhang, Ya-Ting;Yang, Qiao-Li;Zhang, Chen-Xia;Guo, Qing;Qin, Zhao;Liu, Hua-Min;Wang, Xue-De;Xua, Shuai;Zhang, Ya-Ting;Yang, Qiao-Li;Zhang, Chen-Xia;Guo, Qing;Qin, Zhao;Liu, Hua-Min;Wang, Xue-De;Yuan, Jing-Yang;Zhang, Ya-Ting;Mei, Hong-Xian;Duan, Ying-Hui

作者机构：

关键词： Benzo(a)pyrene adsorption; Lignin-based biochar; Sesame oil

期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：7.7； 五年影响因子：7.7 ）

ISSN： 0141-8130

年卷期： 2024 年 269 卷

页码：

收录情况： SCI

摘要： Agricultural by-products of sesame are promising bioresources in food processing. This study extracted lignin from the by-products of sesame oil production, namely, the capsules and straw of black and white sesame. Using acid, alkali, and ethanol methods, 12 distinct lignins were obtained to prepare biochar, aiming to investigate both the structural characteristics of lignin-based biochar (LBB) and its ability to remove benzo[a]pyrene (BaP) from sesame oil. The results showed that white sesame straw was the most suitable raw material for preparing biochar. In terms of the preparation method, acid-extracted lignin biochar was more effective in removing BaP than alkaline or ethanol methods. Notably, WS-1LB (white sesame straw acid-extracted lignin biochar) exhibited the highest BaP adsorption efficiency (91.44 %) and the maximum specific surface area (1065.8187 m2/g), characterized by porous structures. The pseudo 2nd and Freundlich models were found to be the best fit for the adsorption kinetics and isotherms of BaP on LBB, respectively, suggesting that a multilayer adsorption process was dominant. The high adsorption of LBB mainly resulted from pore filling. This study provides an economical and highly efficient biochar adsorbent for the removal of BaP in oil.

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