标题: Efficient removal of tetracycline from water by tannic acid-modified rice straw-derived biochar:Kinetics and mechanisms

作者: Chen, JA (Chen, Jiaao); Li, H (Li, He); Li, JH (Li, Jiahao); Chen, FY (Chen, Fangyuan); Lan, JR (Lan, Jirong); Hou, HB (Hou, Haobo)

来源出版物: JOURNAL OF MOLECULAR LIQUIDS卷: 340 DOI: 10.1016/j.molliq.2021.117237出版年: OCT 15 2021

摘要: Rice straw-derived biochar (BC) has the advantage of low cost to remove tetracycline (TC) as a potential adsorbent, but it is limited by its poor adsorption capacity. On this basis, it was modified with tannic acid (TA) by precovering to increase the number of oxygen-containing functional groups. The structure and chemical properties of the modified BC were characterized and the adsorption behavior of TC on the modified BC was tested. The adsorption kinetics and isothermal data indicated that the adsorption performance of TC was improved after modification, and the adsorption capacity reached 308 mg/g, which was better than other congeneric adsorbents. The adsorption mechanism mainly included physical adsorption, electrostatic interaction, hydrogen bonding, and pi-pi interaction. The results of this study revealed that TA promoted the removal of TC from BC, and it was also beneficial to the rice straw-derived BC as an engineering adsorbent for the removal of TC from water. (C) 2021 Published by Elsevier B.V.

作者关键词: Rice straw; Biochar; Dissolved organic matter; Tannic acid; Tetracycline

地址: [Chen, Jiaao; Li, He; Li, Jiahao; Chen, Fangyuan; Lan, Jirong; Hou, Haobo] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China.

[Hou, Haobo] Zhaoqing Wuhan Univ, Environm Technol Res Inst, Zhaoqing 526200, Guangdong, Peoples R China.

通讯作者地址: Hou, HB (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China.

Hou, HB (通讯作者)，Zhaoqing Wuhan Univ, Environm Technol Res Inst, Zhaoqing 526200, Guangdong, Peoples R China.

电子邮件地址houhb@whu.edu.cn:

影响因子：6.165