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

[Display omitted] •MnFe2O4-biochar composite was facilely synthesized based on common biowastes.•The novel composite has large specific surface area and rich functional groups.•The composite shows efficient and high Tl(I) removal capacity.•Multi-mechanisms involved in the effective Tl(I) removal wer...

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Bibliographic Details
Published inJournal of hazardous materials Vol. 401; p. 123311
Main Authors Liu, Juan, Ren, Shixing, Cao, Jielong, Tsang, Daniel C.W., Beiyuan, Jingzi, Peng, Yutao, Fang, Fa, She, Jingye, Yin, Meiling, Shen, Nengping, Wang, Jin
Format Journal Article
LanguageEnglish
Published Elsevier B.V 05.01.2021
Subjects
Engineered biochar
Industrial wastewater treatment
Iron/manganese coprecipitation
Sustainable engineering
Thallium remediation
Thallium remediation
Engineered biochar
Sustainable engineering
Iron/manganese coprecipitation
Industrial wastewater treatment
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Summary:[Display omitted] •MnFe2O4-biochar composite was facilely synthesized based on common biowastes.•The novel composite has large specific surface area and rich functional groups.•The composite shows efficient and high Tl(I) removal capacity.•Multi-mechanisms involved in the effective Tl(I) removal were examined and distinguished. 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.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2020.123311