Enhanced adsorption of tetracycline by an iron and manganese oxides loaded biochar: Kinetics, mechanism and column adsorption

被引：0

作者：

Zhang X. ^{[1
,2
]}

Li Y. ^{[1
]}

Wu M. ^{[1
]}

Pang Y. ^{[1
]}

Hao Z. ^{[1
]}

Hu M. ^{[3
]}

Qiu R. ^{[2
]}

Chen Z. ^{[1
]}

机构：

[1] School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Xinxiang

[2] College of Environment, Zhejiang University of Technology, Hangzhou, 310032, Zhejiang

来源：

Bioresource Technology | 2021年 / 320卷

基金：

中国国家自然科学基金;

关键词：

Adsorption; Biochar; Mechanism; Tetracycline;

D O I：

10.1016/j.biortech.2020.124264

中图分类号：

学科分类号：

摘要：

A Fe/Mn oxides loaded biochar (FeMn-BC) was prepared to enhance the adsorption of tetracycline (TC). γ-Fe2O3 and MnO2 were assigned to the Fe and Mn oxides, respectively. The enhanced adsorption of TC was dominated by the loaded γ-Fe2O3 and MnO2. According to Akaike-Information-Criteria evaluation, Elovich kinetic and Langmuir isotherm models could best describe the adsorption with a maximum capacity of 14.24 mg/g. During adsorption process, the γ-Fe2O3 and MnO2 hydrolyzed into hydroxides (FeOOH and MnOOH) which acted as bases to complex with TC2− ion under alkaline condition (pH = 11). After the adsorption, the concentrations of leached Fe and Mn could meet the requirements PRC standards GB13456-2012 and GB8978-1996, respectively. The FeMn-BC had ~24% on TC removal (initial concentration of 20 mg/L) after four-cycles regeneration. The FeMn-BC was also available for TC adsorptions in column tests and actual wastewater. © 2020 Elsevier Ltd

引用

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