Literature DB >> 33130541

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

Xin Zhang1, Yaru Li2, Mengru Wu2, Yao Pang2, Zhenbing Hao2, Mian Hu3, Rongliang Qiu4, Zhihua Chen2.   

Abstract

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.
Copyright © 2020 Elsevier Ltd. All rights reserved.

Entities:  

Keywords:  Adsorption; Biochar; Mechanism; Tetracycline

Mesh：

Substances：

Year:  2020        PMID： 33130541     DOI： 10.1016/j.biortech.2020.124264

Source DB:  PubMed          Journal:  Bioresour Technol        ISSN： 0960-8524            Impact factor:   9.642


  7 in total

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  7 in total

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