天津农学院学报 ›› 2026, Vol. 33 ›› Issue (2): 28-33.doi: 10.19640/j.cnki.jtau.2026.02.006

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核桃壳生物炭对废水中罗丹明B的吸附性能研究

康少杰1, 戚尹佳1, 卜路霞1,通信作者, 刘文1, 胡雯雯2   

  1. 1.天津农学院 基础科学学院,天津 300392;
    2.枣庄市科技信息研究所,山东 枣庄 277800
  • 收稿日期:2025-03-24 出版日期:2026-04-30 发布日期:2026-05-06
  • 通讯作者: 卜路霞(1980—),女,副教授,博士,主要从事材料化学及生物资源综合利用研究。E-mail:buluxia@126.com。
  • 作者简介:康少杰(2002—),男,本科在读,主要从事材料化学研究。E-mail:26646423298@qq.com。
  • 基金资助:
    天津市大学生创新训练计划项目(202310061119); 天津市教委科研计划项目(2021KJ113); 枣庄市科技计划项目、枣庄市自主创新及成果转化计划(2022GH20)

Study on adsorption properties of walnut shell biochar to Rhodamine B in waste water

Kang Shaojie1, Qi Yinjia1, Bu Luxia1,Corresponding Author, Liu Wen1, Hu Wenwen2   

  1. 1. College of Basic Science, Tianjin Agricultural University, Tianjin 300392, China;
    2. Zaozhuang Institute of Science and Technology Information, Zaozhuang 277800, Shandong Province, China
  • Received:2025-03-24 Online:2026-04-30 Published:2026-05-06

摘要: 以核桃壳为原料,通过高温热解(500 ℃,2 h)和NaOH改性处理制备核桃壳生物炭,采用紫外-可见分光光度法测定罗丹明B的浓度,分析了吸附时间、改性核桃壳生物炭的加入量、罗丹明B的初始质量浓度对吸附性能的影响,探究了改性核桃壳生物炭对罗丹明B的吸附机制。结果表明:当改性核桃壳生物炭的投加量为0.02 g、罗丹明B溶液的体积为20 mL、罗丹明B溶液的初始质量浓度为2.0 mg/L、吸附时间为130 min时,罗丹明B的去除率达到94.65%,对应的吸附量为1.893 1 mg/g。NaOH改性制备的核桃壳生物炭对罗丹明B溶液的吸附过程遵从准二级动力学方程,Langmuir吸附等温模型能更准确地描述该吸附过程,吸附过程为表面均匀的单层吸附,受化学吸附控制。

关键词: 改性核桃壳生物炭, 罗丹明B, 吸附动力学, NaOH

Abstract: Using walnut shells as raw materials, the modified walnut shell biochar was prepared by high temperature pyrolysis (500 ℃, 2 h)and NaOH modification treatment. The concentration of Rhodamine B was determined by UV-visible spectrophotometry. The effects of adsorption time, the dosage of modified walnut shell biochar and the initial mass concentration of Rhodamine B on the adsorption performance were analyzed. The adsorption mechanism of modified walnut shell biochar on Rhodamine B was investigated. The results showed that when the dosage of modified walnut shell biochar was 0.02 g, the volume of Rhodamine B solution was 20 mL, the initial mass concentration of Rhodamine B solution was 2.0 mg/L, and the adsorption time was 130 min,the removal rate of Rhodamine B was 94.65%, and the corresponding adsorption capacity was 1.893 1 mg/g. The adsorption process of Rhodamine B solution by NaOH-modified walnut shell biohar accorded with the quasi-second-order kinetic equation, and Langmuir adsorption isotherm model can describe the adsorption process accurately, indicating that the adsorption process was a single-layer adsorption with uniform surface and controlled by chemical adsorption.

Key words: modified walnut shell biochar, Rhodamine B, adsorption kinetics, NaOH

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