皮革科学与工程 ›› 2021, Vol. 31 ›› Issue (6): 14-20.doi: 10.19677/j.issn.1004-7964.2021.06.003

• 试验研究 • 上一篇    下一篇

制革污泥生物炭对废水中亚甲基蓝的吸附性能研究

周波1, 穆传辉1, 唐余玲1, 周建飞1,2,*   

  1. 1.四川大学制革清洁技术国家工程研究中心,四川 成都 610065;
    2.四川大学皮革化学与工程教育部重点实验室,四川 成都 610065
  • 收稿日期:2021-05-24 出版日期:2021-12-28 上线日期:2021-11-25
  • 通讯作者: *周建飞(1978-),男,博士,教授,zhouamao2004@126.com,主要从事制革清洁技术、污染物防控技术。
  • 作者简介:周波(1997-),男,硕士研究生,followyournature@163.com。
  • 基金资助:
    国家重点研发计划(2017YFB0308500)

Study on the Adsorption Performance of Tannery Sludge Biochar Towards Methylene Blue from Wastewater

ZHOU Bo1, MU Chuanhui1, TANG Yuling1, ZHOU Jianfei1,2,*   

  1. 1. National Engineering Research Center of Clean Technology in Leather Industry,, Sichuan University, Chengdu 610065, China;
    2. The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu 610065, China
  • Received:2021-05-24 Online:2021-12-28 Published:2021-11-25

摘要: 以制革污泥为原料,在氮气氛围下,控制热解温度在300~700 ℃范围内,制备了污泥基生物炭(TSBC),并研究了其对亚甲基蓝染料(MB)的吸附效果及机理。结果表明,500 ℃下热解得到的生物炭TSBC500,比表面积最大,为40.98 m2/g,其平均孔径是9.21 nm,且表面存在大量-OH、-COOH等含氧官能团。相较于其他温度热解得到的生物炭,TSBC500 对MB的吸附去除率最高。吸附行为符合拟二级动力学模型与Langmuir热力学模型,吸附过程为主要受化学吸附控制的单分子层吸附。TSBC500对MB的最大吸附容量可达76.34 mg/g。结合FTIR分析发现,TSBC500对MB的吸附主要是静电作用、氢键作用、离子交换和π-π EDA等共同作用的结果。

关键词: 制革污泥, 生物炭, 亚甲基蓝, 吸附

Abstract: Tannery sludge was used as raw material to prepare the biochar (TSBC) by traditional pyrolysis method under a nitrogen atmosphere, and the adsorption performance and mechanism of TSBC were studied using methylene blue (MB) as model pollutant. The results indicated that the properties reached the maximum at 500 ℃. The specific surface area and average pore diameter of TSBC500 were 40.98 m2/g and 9.21 nm, respectively, and a large number of oxygen-containing functional groups such as -OH and -COOH were formed on the surface. Compared with the TSBC obtained under other pyrolysis temperatures, TSBC500 showed the superior removal efficiency of MB (92.3%), and the maximum adsorption capacity reached up to 76.34 mg/g. Besides, the adsorption process of MB was in accordance with a pseudo-second-order kinetics and the Langmuir isotherm well. Combined with FTIR analysis, the adsorption mechanism of TSBC500 on MB was mainly dependent on the electrostatic attraction, hydrogen-bond interaction, ion exchange, π-π EDA.

Key words: tannery sludge, biochar, methylene blue, adsorption

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