Highly efficient removal of thallium in wastewater by MnFe2O4-biochar composite.

Thallium (Tl), is a highly toxic trace metal in the natural environment. Emerging Tl pollution in waters has gradually become a global concern. However, limited removal technologies are available for Tl-containing wastewater. Herein, MnFe2O4-biochar composite (MFBC) was successfully fabricated via coprecipitation method as a novel and efficient adsorbent for treating Tl(I)-contaminated wastewater. It was found that the MFBC, with a specific surface area of 187.03 m2/g, exhibited high performance across a wide pH range of 4-11, with the superior Tl(I) removal capacity (170.55 mg/g) based on Langmuir model (pH 6.0, a dosage of 1 g/L). The removal mechanisms included physical and chemical adsorption, ion exchange, surface complexation, and oxidation. This investigation revealed that MFBC is a promising and environmentally friendly adsorbent with a low cost, large specific surface area, magnetic properties, and high efficiency for the removal of Tl(I) from wastewater. Copyright © 2020 Elsevier B.V. All rights reserved.

Citation

Juan Liu, Shixing Ren, Jielong Cao, Daniel C W Tsang, Jingzi Beiyuan, Yutao Peng, Fa Fang, Jingye She, Meiling Yin, Nengping Shen, Jin Wang. Highly efficient removal of thallium in wastewater by MnFe2O4-biochar composite. Journal of hazardous materials. 2021 Jan 05;401:123311

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PMID: 32652417

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