Peroxydisulfate Co-Treatment with MnOx-Loaded Biochar for COD Removal from Automobile Service Station Wastewater

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dc.contributor.authorSuwannarat, Glinsukol
dc.contributor.authorPattanagulanan, Kunlasatree
dc.contributor.authorRueangsukhon, Chonlada
dc.contributor.authorNasingthong, Panatda
dc.contributor.authorChaiyaraksa, Chompoonut
dc.date.accessioned2026-08-06T10:40:24Z
dc.date.available2026-08-06T10:40:24Z
dc.date.issued2023-01-01
dc.description.abstractThis research was aimed at recycling agricultural waste and treating synthetic automobile service station wastewater. Wastewater was synthesized to two levels of COD concentration: 702 mg/L (WW-A) and 7,054 mg/L (WW-B). In the treatment process, 100 mM sodium peroxydisulfate with MnO<inf>x</inf>-loaded biochar (MnO<inf>x</inf>-Biochar) was applied. The MnO<inf>x</inf>-Biochar was produced by dipping corn cob biochar in 40 mM manganese sulfate followed by pyrolyzed at 600°C. The surface area, pore volume, pore size, and pH value at the zero-point charge of MnO<inf>x</inf>-Biochar were 130 m<sup>2</sup>/g, 0.044 cm<sup>3</sup>/g, 1.02 nm, and 7.05, respectively. From the FTIR spectrogram, a peak assignable to Mn-O was observed. The results showed that the initial pH of the wastewater did not affect the treatment efficiency. The optimum MnO<inf>x</inf>-Biochar dosage was 2 g/L. Equilibrium was reached within 120 min of reaction. During the first 15 min, the treatment rate constants (k) of the WW-A and WW-B treatment were 0.0647 min<sup>-1</sup> and 0.0349 min<sup>-1</sup>, respectively. After 15 min, the k values of the WW-A and WW-B treatments were reduced to 0.0242 min<sup>-1</sup> and 0.0094 min<sup>-1</sup>, respectively. The overall treatment efficiencies of the low COD wastewater (WW-A) and high COD wastewater (WW-B) were 97% and 78%, respectively. The treatment mechanisms involved both adsorption and oxidation. The adsorption efficiencies of the WW-A and WW-B treatments were 36% and 18%, respectively.
dc.identifier.citationCurrent Applied Science and Technology, 23(2), 2023
dc.identifier.doi10.55003/cast.2022.02.23.004
dc.identifier.issn25869396
dc.identifier.other2-s2.0-85149663180
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/14128
dc.sourceCurrent Applied Science and Technology
dc.subjectbiochar
dc.subjectcorn cob
dc.subjectmanganese oxide
dc.subjectoxidation
dc.subjectsodium peroxydisulfate
dc.titlePeroxydisulfate Co-Treatment with MnOx-Loaded Biochar for COD Removal from Automobile Service Station Wastewater
dc.typeArticle

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