Magnesium oxide nanoparticles modified biochar derived from tea wastes for enhanced adsorption of o-chlorophenol from industrial wastewater

In this work, magnesium oxide nanoparticles supported biochar derived from tea wastes (MgO@TBC) was prepared as an effective adsorbent for removing hazardous o-chlorophenol (o-CP) from industrial wastewater. The surface area, porous structure, surface functional groups and surface charge of tea wast...

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Published inChemosphere (Oxford) Vol. 337; p. 139342
Main Authors Chu, Thi Thu Hien, Tran, Thi Minh Nguyet, Pham, Minh Thuy, Viet, Nguyen Minh, Thi, Huong Pham
Format Journal Article
LanguageEnglish
Published England Elsevier Ltd 01.10.2023
Subjects
Adsorption
Biochar
Charcoal - chemistry
Industrial wastewater
Kinetics
Magnesium oxide
Magnesium Oxide - chemistry
Nanoparticles
O-chlorophenol
Tea
Tea wastes
Wastewater
Water Pollutants, Chemical - analysis
Industrial wastewater
Adsorption
Biochar
Magnesium oxide
Tea wastes
O-chlorophenol
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Summary:In this work, magnesium oxide nanoparticles supported biochar derived from tea wastes (MgO@TBC) was prepared as an effective adsorbent for removing hazardous o-chlorophenol (o-CP) from industrial wastewater. The surface area, porous structure, surface functional groups and surface charge of tea waste biochar (TBC) significantly enhanced after the modification process. The best uptake performance of o-CP was found at pH = 6.5 and 0.1 g of MgO@TBC adsorbent. According to the adsorption isotherm, the adsorption of o-CP onto MgO@TBC followed the Langmuir model with a maximum uptake capacity of 128.7 mg/g, which was 26.5% higher than TBC (94.6 mg/g). MgO@TBC could be reused for eight cycles with a high o-CP uptake performance (over 60%). Besides, it also exhibited good removal performance of o-CP from industrial wastewater with a removal rate of 81.7%. The adsorption behaviors of o-CP onto MgO@TBC are discussed based on the experimental results. This work may provide information to prepare an effective adsorbent for removing hazardous organic contaminants in wastewater. [Display omitted] •MgO modified biochar derived from tea wastes (MgO@TBC) was prepared.•Removal of o-chlorophenol by MgO@TBC was investigated.•Maximum adsorption capacity of o-chlorophenol was 128.7 mg/g.•81.7% o-chlorophenol was removed from industrial wastewater.
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ISSN:0045-6535
1879-1298
DOI:10.1016/j.chemosphere.2023.139342