Repository of Research and Investigative Information

Repository of Research and Investigative Information

Ilam University of Medical Sciences

LED-light-driven over ZnO/biochar nanocomposite for activation of peroxymonosulfate to enhanced photocatalytic removal of methyl orange dye in aqueous solutions

Sun Mar 3 09:11:50 2024

(2023) LED-light-driven over ZnO/biochar nanocomposite for activation of peroxymonosulfate to enhanced photocatalytic removal of methyl orange dye in aqueous solutions. Environmental Technology. p. 17. ISSN 0959-3330

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Abstract

Organic dyes are stable and persistent toxic compounds in the aquatic environment that are refractory to decompose by removal methods such as physico-chemical, optical and biological. Their presence in the aquatic media threatens human and wildlife. Herein, ZnO nanoparticles (NPs) due to good chemical durability, low cost and good photocatalytic performance was anchored on biochar (ZnO@biochar) nanocomposites were synthesized towards activation of peroxymonosulfate (PMS) for the photocatalytic removal of methyl orange (MO) dye. Several methods were used to characterization of the nanocomposites including FESEM, XRD, PL, EDS, FT-IR spectroscopy, and N2 adsorption/desorption. The results of the techniques demonstrated that the well-dispersed ZnO NPs were loaded onto the biochar surface. According to the particle size distribution graph, the average particle size of 64 nm was obtained for the ZnO NPs. BET analyzes showed that pore volume, the specific surface area (SSA) and average pore size of the synthesized nanocomposite increased. The survey of effective operational parameters indicated that the highest photocatalytic activity for MO removal was in the pH 3 of solution, 5 ppm initial dye concentration, 30 mg ZnO/biochar nanocomposite, and 20 mg PMS dose under LED-50W lamp irradiation (97.03 in the reaction time of 80 min). During the process, the reduction of the total organic carbon (TOC) contents and chemical oxygen demand (COD) were observed. Moreover, the MO degradation kinetics under optimal operating conditions were determined. It is concluded that the ZnO@biochar nanocomposite/PMS process was an efficient degradation method for the decomposition of the dye pollutant. GRAPHICS .

Item Type: Article
Creators:
CreatorsEmail
Saraee, H.UNSPECIFIED
Noorimotlagh, Z.UNSPECIFIED
Mansouri, M.UNSPECIFIED
Mirzaee, S. A.UNSPECIFIED
Martinez, S. S.UNSPECIFIED
Keywords: Photocatalytic degradation ZnO@biochar LED lamp peroxymonosulfate methyl orange bisphenol-a degradation nanoparticles water tio2 photodegradation adsorption performance mechanisms parameters Environmental Sciences & Ecology
Divisions:
Page Range: p. 17
Journal or Publication Title: Environmental Technology
Journal Index: ISI
Identification Number: https://doi.org/10.1080/09593330.2023.2250546
ISSN: 0959-3330
Depositing User: مهندس مهدی شریفی
URI: http://eprints.medilam.ac.ir/id/eprint/4352

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