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All Journal Indonesian Journal of Chemistry
Alya Awinatul Rohmah
Department of Chemistry, Faculty of Science and Data Analytics, Institut Teknologi Sepuluh Nopember (ITS), Kampus ITS Sukolilo, Surabaya 60111, Indonesia
Chemical Engineering, Chemistry & Bioengineering Chemistry

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Biodecolorization of Methylene Blue by Using Bacillus subtilis Immobilized into SA-PVA-Bentonite Matrix in Mineral Salt Medium and Non-nutritious Medium Alya Awinatul Rohmah; Adi Setyo Purnomo; Widiya Nur Safitri
Indonesian Journal of Chemistry Vol 22, No 6 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.76080

Abstract

Industrial dye wastewater can potentially cause significant harm to organisms and the environment across the world. Methylene blue (MB) is a synthetic dye that can be found in wastewater. Immobilizing clay material and degradative bacteria into a carrier is the best way to remove MB. Therefore, this study aimed to immobilize Bacillus subtilis in sodium alginate (SA)-polyvinyl alcohol (PVA)-Bentonite for adsorption and degrading MB in nutritious mineral salt medium (MSM) and non-nutritious media. The result showed that SA-PVA-Bentonite-non-living B. subtilis beads (SPB-nBS) had the highest result in non-nutritious medium, approximately 88.89%. While in nutritious MSM, living B. subtilis addition into beads (SPB-BS) reached the highest MB removal, which was 94.31%. Nutritious MSM had a role as the sole carbon and energy for living B. subtilis. So, it could adsorb and degrade MB by its enzymatic system. The degradation products were predicted as C7H10N2O4S, C8H10N2O2 and C6H8N2O3S. Hence, this study indicated that a nutritious medium was the suitable medium for MB degradation. According to the SEM result, the bacteria spread and covered the beads. Furthermore, the adsorption kinetics and isotherms were also analyzed; SPB beads followed the pseudo-second order kinetic model and Langmuir isotherm.
Involvement of Fenton Reaction on Biodecolorization and Biodegradation of Methylene Blue Dye by Brown Rot Fungi Daedalea dickinsii Adi Setyo Purnomo; Alya Awinatul Rohmah; Weni Sri Ekowati; Hamdan Dwi Rizqi; Asranudin Asranudin
Indonesian Journal of Chemistry Vol 23, No 6 (2023)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.77689

Abstract

The disposal of dye wastewater has become a major global concern. Meanwhile, microorganisms have shown high potential in the treatment of wastewater pollutants. In this study, the involvement of the Fenton reaction in the biodecolorization and biodegradation of methylene blue (MB) by the brown rot fungus Daedalea dickinsii was investigated. Subsequently, D. dickinsii is a fungus capable of producing hydroxyl radicals (•OH). This experiment was conducted with an initial MB concentration of 75 mg/L, and different incubation times of 0, 7, 14, 21, and 28 d respectively. The result showed that the Fenton reaction played an important role, and this was demonstrated by the addition of FeSO4 as a Fe2+ source. The removal of MB by D. dickinsii with the addition of Fe2+ reached 91.454% at 28 d in a mineral salt medium. It was higher compared to D. dickinsii culture treatment without Fe2+ addition, 86.427%. Furthermore, the metabolic degradation product was analyzed using LC-TOF/MS and identified as 2-amino-3-hydroxy-5-(methylamino) benzenesulfonic acid and N-(3,4-dihydroxy phenyl)-N-methyl formamide.
Co-Authors Adi Setyo Purnomo Asranudin Asranudin Hamdan Dwi Rizqi Weni Sri Ekowati Widiya Nur Safitri