天津农学院学报 ›› 2024, Vol. 31 ›› Issue (4): 39-44.doi: 10.19640/j.cnki.jtau.2024.04.008

• 研究与简报 • 上一篇    下一篇

花生壳生物炭的制备及其对水中罗丹明B的吸附性能研究

陆星蓉1, 蒋星宇1, 胡欣1, 邱钰桁1, 卜路霞1,通信作者, 宋振兴2   

  1. 1.天津农学院 基础科学学院,天津 300392;
    2.天津朗缪新材料科技有限公司,天津 300384
  • 收稿日期:2024-03-11 出版日期:2024-08-31 发布日期:2024-09-11
  • 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:陆星蓉(2000—),女,本科在读,主要从事生物资源的综合利用。E-mail:2427509210@qq.com。
  • 基金资助:
    天津市大学生创新创业训练计划项目(202210061050,202310061119); 枣庄市自主创新及成果转化计划(2022GH20); 天津市教委科研计划项目(2021KJ113); 天津市科技计划项目(20YDTPJC01080)

Preparation of peanut shell biochar and its adsorption performance on Rhodamine B in water

Lu Xingrong1, Jiang Xingyu1, Hu Xin1, Qiu Yuheng1, Bu Luxia1,Corresponding Author, Song Zhenxing2   

  1. 1. College of Basic Science, Tianjin Agricultural University, Tianjin 300392, China;
    2. Tianjin Langmiu New Material Technology Co., Ltd., Tianjin 300384, China
  • Received:2024-03-11 Online:2024-08-31 Published:2024-09-11

摘要: 以花生壳为原料,KOH为改性剂,通过限氧热解法在200 ℃下制备花生壳生物炭用于吸附水中的罗丹明B。采用单因素试验,考察了罗丹明B初始浓度、溶液pH、吸附时间、生物炭投加量等对罗丹明B吸附效果的影响,并对吸附机制进行了分析。研究表明,在活性炭投加量为20 mg,罗丹明B溶液体积25.00 mL、初始质量浓度1.00 mg/L,转速150 r/min的条件下吸附75 min,此时去除率达97.90%。参数拟合结果表明,准二级动力学方程(R2=0.998 2)能够更好地描述改性花生壳生物炭对罗丹明B的吸附过程,吸附等温线更遵循Langmuir等温吸附模型,属于单分子层化学吸附。

关键词: 花生壳, 生物炭, 罗丹明B, 吸附, KOH

Abstract: Using peanut shell as raw material and KOH as modifier, peanut shell biochar was prepared for adsorption of Rhodamine B in water by oxygen-limited pyrolysis at 200 ℃. The effects of initial concentration of Rhodamine B, pH of solution, adsorption time and dosage of biochar on the adsorption of Rhodamine B were investigated by single factor experiment, and the adsorption mechanism was also analyzed. The results showed that at the dosage of 20 mg, the volume of 25.00 mL, the initial concentration of 1.00 mg/L, the rotate speed of 150 r/min and the adsorption time of 75 min, the removal rate reached 97.90%. The results of parameter fitting showed that the adsorption process of Rhodamine B by modified peanut shell biochar followed the quasi-second-order kinetic equation(R2=0.998 2), and the adsorption isotherm followed the Langmuir isotherm adsorption model, which belonged to single molecular layer chemisorption.

Key words: peanut shell, biochar, Rhodamine B, adsorption, KOH

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