白酒废水污泥基生物炭对亚甲基蓝的吸附特性研究

doi:10.14088/j.cnki.issn0439-8114.2022.10.011

湖北农业科学 ›› 2022, Vol. 61 ›› Issue (10): 67-73.doi: 10.14088/j.cnki.issn0439-8114.2022.10.011

白酒废水污泥基生物炭对亚甲基蓝的吸附特性研究

赵居芳, 冯丹, 尚江伟, 祁宝川

伊犁师范大学化学与环境科学学院,新疆伊宁 835000

收稿日期:2022-02-08 出版日期:2022-05-25 发布日期:2022-06-14
通讯作者: 祁宝川（1990-）,男,甘肃白银人,讲师,（电子信箱）qibchuan@163.com。
作者简介:赵居芳（1992-）,女,甘肃兰州人,在读硕士研究生,研究方向为环境分析,（电话）13099231273（电子信箱）1414749306@qq.com。
基金资助:
新疆维吾尔自治区自然科学青年项目（XJEDU2021Y045）

Adsorption properties of methylene blue by liquor wastewater sludge-based biochar

ZHAO Ju-fang, FENG Dan, SHANG Jiang-wei, QI Bao-chuan

College of Chemistry and Environmental Science, Yili Normal University, Yining 835000, Xinjiang,China

Received:2022-02-08 Online:2022-05-25 Published:2022-06-14

摘要/Abstract

摘要： 以白酒废水污泥（LWS）为原料制备白酒废水污泥基生物炭（LWSB）,设计静态吸附试验,研究不同初始pH、吸附剂用量及吸附时间等因素对LWSB吸附水溶液中亚甲基蓝（MB）的影响。通过比表面积分析仪（BET）、扫描电镜（SEM）、电子能谱仪（XPS）和傅立叶变换红外光谱（FTIR）探究LWSB对MB的吸附机理。结果表明,与LWS相比,LWSB的比表面积和孔容显著增加,而平均孔径有所减小。在溶液初始pH为8、投加量为1.0 mg/L、吸附时间为360 min及温度为44.85 ℃的条件下,理论最大吸附量为213.86 mg/g;吸附动力学符合准二级反应动力学;Redlich-Peterson等温线模型能较好地描述LWSB吸附MB的吸附等温过程。LWSB对MB的吸附是自发的、吸热的、熵增的过程。吸附机理与静电相互作用、氢键、配位络合作用、π-π和n-π相互作用等有关。

关键词: 白酒废水污泥基生物炭, 亚甲基蓝, 吸附动力学, 热力学, 机理

Abstract: Liquor wastewater sludge-based biochar（LWSB） was prepared from liquor wastewater sludge（LWS）. The static adsorption experiment was used to study the effects of different initial pH, adsorption dosage, adsorption time, initial mass concentration and temperature on methylene blue （MB） adsorption by LWSB. The adsorption mechanism of MB by LWSB was investigated by brunauer-emmett-teller（BET） surface area, scanning electron microscope（SEM）, X-ray photoelectron spectroscopy（XPS） and fourier transform infrared spectroscopy（FTIR）. The results showed that compared with LWS, the specific surface area and pore volume of LWSB increased significantly, while the average pore size decreased. Under the condition of initial pH of 8, dosage of 1.0 mg/L, adsorption time of 360 min and temperature of 44.85 ℃, the theoretical maximum adsorption capacity was 213.86 mg/g. It was found that MB adsorption by LWSB fitted well the pseudo-second order kinetics model, and can be well described by the Redlich-Peterson isotherm model. The adsorption of MB by LWSB was a process of spontaneous, endothermic, entropy increasing process. The mechanism between LWSB and MB involved electrostatic interaction, hydrogen bonding, complexation, π-π, n-π interaction, etc.

Key words: liquor wastewater sludge-derived biochar, methylene blue, adsorption kinetics, thermodynamics, mechanism

中图分类号:

X797
X705

赵居芳, 冯丹, 尚江伟, 祁宝川. 白酒废水污泥基生物炭对亚甲基蓝的吸附特性研究[J]. 湖北农业科学, 2022, 61(10): 67-73.

ZHAO Ju-fang, FENG Dan, SHANG Jiang-wei, QI Bao-chuan. Adsorption properties of methylene blue by liquor wastewater sludge-based biochar[J]. HUBEI AGRICULTURAL SCIENCES, 2022, 61(10): 67-73.

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白酒废水污泥基生物炭对亚甲基蓝的吸附特性研究

Adsorption properties of methylene blue by liquor wastewater sludge-based biochar

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