Cu-Mn-MRBC去除水中ENR、STZ及TCH抗生素的性能与机理

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Abstract This study aimed to investigate the mechanism of action of multiple antibiotic pollutants coexisting in water bodies. In this work, MR biochar (MRBC) was obtained through carbonization using waste bacterial residue (MR) as raw material, and Cu-Mn-MRBC was synthesized through the composite modification of both copper and manganese. The materials were characterized and analyzed by SEM, BET, XRD, FTIR, zeta potential, and EA. Furthermore, the adsorption performance of three antibiotics of ENR, STZ and TCH in single and mixed solutions was studied as well. The results show that comparing with single solution, the emergence of competitive adsorption in mixed solutions increases the selective depletion of oxygen-containing functional groups. Moreover, it promotes the adsorption of TCH with the removal rate of 96.50% in the mixed solution, but inhibits STZ more than ENR, with the removal rates in the mixed solution of 39.38% and 46.13%, respectively. Absorption process in the system decreased the pH dependence. The presence of coexisting cations affects the competitive adsorption capacity of antibiotics. Pseudo-second-order kinetic and Freundlich isotherm models can better describe the adsorption process of Cu-Mn-MRBC. The adsorption is mainly the results of electrostatic interaction, π-π interaction, hydrogen bonding, and surface complexation.

Key words： mushroom residue biochar compound modification antibiotics competitive adsorption kinetics

Received: 05 May 2022

PACS:

X703

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	Articles by authors
	DONG Ying-hong
	LI Hong-yan
	CUI Jian-guo
	FENG Kun
	LI Shang-ming
	WANG Fang

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DONG Ying-hong,LI Hong-yan,CUI Jian-guo等. Performance and mechanism of Cu-Mn-MRBC in the removal of ENR, STZ and TCH antibiotics from water[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(12): 5668-5678.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I12/5668

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