改性市政污泥对水中苯酚的吸附性能研究

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摘要采用高效、低成本的吸附材料去除废水中酚类有机物一直是工业废水深度处理的迫切需求,利用市政污泥分别经碳化、碱活化及磁化后制备获得改性污泥基吸附剂为碳化污泥(Carbonized sludge, CS)、碱活化污泥(Activated carbonized sludge, ACS)、磁改性污泥(Magnetic activated carbonized sludge, MACS),对水溶液中苯酚进行了吸附实验,并对3种吸附材料特性进行了表征。研究表明,KOH活化可提升CS的孔隙率,磁改性可显著提高材料的比表面积,使孔径范围向介孔集中,改性后羟基和羰基等含氧官能团大幅增加,ACS和MACS均表现出较高的吸附量,但其吸附量显著受污染物浓度和反应时间影响,CS对苯酚的吸附主要受化学过程控制,而ACS和MACS的吸附除有化学吸附外,介孔效应也是其吸附的重要机制,综合吸附效能从高到低依次为MACS>ACS>CS。

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	马紫珺
	马宏瑞
	朱超
	崔家烨

关键词：剩余污泥碳化改性吸附苯酚

Abstract： It is always an urgent need for advanced treatment of industrial wastewater to use efficient and low-cost adsorbents to remove phenolic organics from wastewater. Modified sludge based adsorbents are prepared from municipal sludge after carbonization, alkali activation and magnetization, including carbonized sludge (CS), activated sludge (ACS) and magnetic activated sludge (MACS). The adsorption experiment of phenol in aqueous solution was carried out, and the characteristics of three adsorption materials were characterized. The results show that KOH activation can improve the porosity of CS, magnetic modification can significantly improve the specific surface area of the material, so that the pore size range is concentrated to the mesoporous. After modification, oxygen-containing functional groups such as hydroxyl and carbonyl are greatly increased. ACS and MACS show high adsorption capacity, but their adsorption capacity is significantly affected by the concentration of pollutants and reaction time. The adsorption of phenol by CS is mainly controlled by chemical processes, while the adsorption of ACS and MACS is in addition to chemical adsorption, mesoporous effect is also an important mechanism of its adsorption. The comprehensive adsorption efficiency is MACS>ACS>CS from high to low.

Keywords： municipal sludge carbonization modification adsorption phenol

Received 2022-05-31;

Fund:国家自然科学基金(201012033)。

Corresponding Authors: 马宏瑞,教授,E-mail:mahr@sust.edu.cn Email: mahr@sust.edu.cn

About author: 马紫珺(1998-),女,硕士研究生,现从事工业废水污染处理方面的研究。

引用本文:

马紫珺, 马宏瑞, 朱超, 崔家烨.改性市政污泥对水中苯酚的吸附性能研究[J]. 化学工业与工程, 2023,40(2): 85-93

MA Zijun, MA Hongrui, ZHU Chao, CUI Jiaye.Municipal sludge modification and their adsorption performance for phenol in wastewater[J]. Chemcial Industry and Engineering, 2023,40(2): 85-93

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