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Environ Sci Pollut Res Int. 2019 Feb;26(6):5892-5903. doi: 10.1007/s11356-018-4033-4. Epub 2019 Jan 6.

Magnetic nanoferromanganese oxides modified biochar derived from pine sawdust for adsorption of tetracycline hydrochloride.

Liang J1,2, Fang Y3,4, Luo Y3,4, Zeng G5,6, Deng J3,4, Tan X3,4, Tang N3,4, Li X3,4, He X3,4, Feng C3,4, Ye S3,4.

Author information

1
College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China. liangjie82@163.com.
2
Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China. liangjie82@163.com.
3
College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China.
4
Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China.
5
College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China. zgming@hnu.edu.cn.
6
Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China. zgming@hnu.edu.cn.

Abstract

In this study, a new type of composite material, namely modified biochar (MBC), was synthesized by loading the magnetic ferromanganese oxide nanoparticles on pine biochar. BET, SEM, and FTIR were employed to analyze the surface properties and pore structures of MBC. In addition, XRD was adopted to examine the crystal structure of MBC. Characterization results showed that the surface area and porosity of MBC have been greatly improved, and the functional groups have been introduced by ferromanganese oxides. Adsorption experiments of tetracycline hydrochloride (TC) including kinetics, isotherms, thermodynamics as well as the influence of pH, salt ion strength, and the environmental risk of MBC, were evaluated. The results revealed that the experimental data conformed to the pseudo-second-order kinetic model and the Freundlich isotherm model. In the adsorption process, MBC showed excellent adsorption ability (maximum capacity for TC 100.74 mg g-1) to BC (33.76 mg g-1). In isotherm experiments, the maximum adsorption capacity of TC by MBC reached 177.71 mg g-1. Toxicity studies showed that the MBC had no harm to the environment. To conclude, MBC has great potential for applications in removing TC from water.

KEYWORDS:

Adsorption; Biochar modification; Ferromanganese oxides; Tetracycline hydrochloride; Toxicity

PMID:
30613885
DOI:
10.1007/s11356-018-4033-4
[Indexed for MEDLINE]

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