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All Journal Journal of Green Chemical and Environmental Engineering
Aremu Mujidat. O
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Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering Environmental Science Materials Science & Nanotechnology

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Enhanced Removal of Malachite Green Dye from Textile Wastewater using TiO₂ Modified Palm Kernel Shell Activated Carbon: Optimization and Mechanistic Assessment Olowonyo Idayat. A; Sole-Adeoye Opeoluwa. D; Salam Kazeem. K; Aremu Mujidat. O; Oreofe Toyin. A; Akinwumi Odunayo. D; Owolabi Stephen. O
Journal of Green Chemical and Environmental Engineering Vol. 1 No. 3 (2025): Journal of Green Chemical and Environmental Engineering
Publisher : Candela Edutech Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63288/jgcee.v1i3.11

Abstract

Malachite Green Dye (MGD), a toxic dye commonly discharged by textile industries, poses environmental and health risks. Simultaneously, the disposal of palm kernel shells (PKS), a byproduct of palm oil production, remains an underexploited resource. This study explores the use of activated carbon derived from PKS, modified with titanium dioxide nanoparticles (TiO2-NP), for the adsorption of malachite green dye from aqueous solution. The adsorbent was characterized for its structural and surface chemistry. Batch adsorption experiments were carried out to evaluate the effects of dosage (0.5-2.5 g), contact time (30-150 min), agitation (100-300 rpm), and temperature (30-60 °C). Process optimization was carried out using the Box-Behnken design under the Response Surface Methodology (RSM) framework. Additionally, kinetic and thermodynamic analyses were performed to gain insights into the adsorption mechanism. Numerical optimization revealed a maximum dye removal of 92.6%. Kinetic analysis supported pseudo-second-order behavior, indicating chemisorption, while thermodynamic data confirmed a spontaneous and endothermic process. The adsorbent showed effective regeneration over five cycles, maintaining high efficiency. The prepared adsorbent exhibited a fixed carbon content of 69.50%, while the presence of functional groups involved in dye binding was confirmed through FTIR analysis. These results underscore the potential of PKSAC-TiO₂ as a cost-effective and sustainable adsorbent for dye-laden wastewater treatment.
Nanostructured Sodium Molybdate Anodes for Enhanced Bioelectricity Generation and sustainable Wastewater Treatment in Microbial Fuel Cells Akinwumi Odunayo. D; Agarry Samuel. E; Aremu Mujidat. O; Olowonyo Idayat. A; Sole-Adeoye Opeoluwa. D; Fajobi Omoteniola. T; Oloyede Victoria. I; Abioye Oyindamola; Odunola Olufolake Adebamke; Popoola Adewemimo.O
Journal of Green Chemical and Environmental Engineering Vol. 1 No. 3 (2025): Journal of Green Chemical and Environmental Engineering
Publisher : Candela Edutech Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63288/jgcee.v1i3.13

Abstract

Abattoir wastewater (ABW) is characterized by extremely high organic loads, posing serious environmental and management challenges. Conventional treatment methods are often inadequate, highlighting the urgent need for advanced, sustainable technologies. Microbial fuel cells (MFCs) offer a promising dual solution by integrating wastewater treatment with renewable bioelectricity generation; however, their performance is limited by inefficient anode materials. To address this gap, this study investigates sodium molybdate dihydrate (Na2MoO₄·2H₂O) nanoparticles as a novel catalyst for anode modification in MFCs treating ABW. The nanoparticles were synthesized using sodium borohydride as a reducing agent and characterized by UV-Vis spectra, FT-IR (functional groups), XRD (size and crystal structure) and TEM (morphology), revealing non-uniform particles within 20–100 nm. MFCs performances were evaluated by comparing Na2MoO₄ coated (doped) electrodes with unmodified graphite electrodes. Results demonstrated a significant enhancement, with the nano-coated electrode achieving a maximum voltage of 899 mV, power density of 1896 mW/m², current density of 2246 mA/m² at 3500 Ω, and 69.9% COD removal efficiency. These findings confirm that Na2MoO₄ based nanostructured anodes can substantially improve both energy recovery and pollutant removal in MFCs, offering a sustainable approach for treating high-strength industrial effluents such as ABW
Co-Authors Abioye Oyindamola Agarry Samuel. E Akinwumi Odunayo. D Fajobi Omoteniola. T Odunola Olufolake Adebamke Olowonyo Idayat. A Oloyede Victoria. I Oreofe Toyin. A Owolabi Stephen. O Popoola Adewemimo.O Salam Kazeem. K Sole-Adeoye Opeoluwa. D