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Chemcial Industry and Engineering 2023, Vol. 40 Issue (2) :85-93    DOI: 10.13353/j.issn.1004.9533.20220345
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Municipal sludge modification and their adsorption performance for phenol in wastewater
MA Zijun, MA Hongrui, ZHU Chao, CUI Jiaye
School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an 710021, China

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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.
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MA Zijun
MA Hongrui
ZHU Chao
CUI Jiaye
Keywordsmunicipal sludge   carbonization   modification   adsorption   phenol     
Received 2022-05-31;
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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,V40(2): 85-93
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