Synthesis of magnetic biochar composites for enhanced uranium(VI) adsorption | Health & Environmental Research Online (HERO)

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Citation
Tags

HERO ID

5020244

Reference Type

Journal Article

Title

Synthesis of magnetic biochar composites for enhanced uranium(VI) adsorption

Author(s)

Li, M; Liu, H; Chen, T; Dong, C; Sun, Y

Year

2019

Is Peer Reviewed?

Journal

Science of the Total Environment
ISSN: 0048-9697
EISSN: 1879-1026

Volume

651

Issue

Pt 1

Page Numbers

1020-1028

Language

English

PMID

30266047

DOI

10.1016/j.scitotenv.2018.09.259

Web of Science Id

WOS:000447915400099

Abstract

Magnetic biochar composites were successfully fabricated by pyrolysis of siderite and rice husk under N2 condition. The results of a variety of characterization implied magnetic biochar displayed porous structures with larger specific surface area. The batch adsorption experiments showed high adsorption properties of magnetic biochar composites toward U(VI) (52.63 mg/g at pH 4.0), whereas U(VI) adsorption was significantly influenced by Na2CO3 and HA. U(VI) adsorbed onto magnetic biochar was reduced to U(IV) by Fe3O4 according to XPS and XANES analyses. In addition, no significant effect of ionic strength of NaCl and EXAFS results, illustrated the inner-sphere surface complexation of U(VI) on magnetic biochar. Owing to the simple synthesis procedure, low cost, high adsorption efficiency, easy separation and environmental friendly, magnetic biochar can be considered as a potential adsorbent for the purification of U(VI)-bearing wastewater in environmental remediation.