Jami, Mohammed Saedi and Nik Abdul Ghani, Nik Rashida
(2023)
Dye removal from wastewater using Moringa Oleifera seed shells based adsorbent.
In: International Conference on Chemical Engineering & Sustainability 2023 ICCHES 2023, 15-16 August 2023, Kuala Lumpur.
(Unpublished)
Abstract
The demand for cost-effective biomaterials-based techniques like adsorption and biosorption has led to the search for affordable biosorbents. Traditional dye removal methods in wastewater suffer from limitations like short usage life, high electricity costs, and ineffectiveness against specific dyes. This research focuses on studying the efficiency and effectiveness of Moringa Oleifera (MO) seed husks as a low-cost adsorbent in dye removal. The study involves employing chemical and physical activation steps, utilizing activating agents to enhance the adsorption capacity of the adsorbent. Response Surface Methodology (RSM) and Design-Expert 13 software were used for process optimization, revealing the highest efficiency (37.83%) at an adsorbent dose of 0.125 g, pH 10, and 70 minutes of adsorption time. Equilibrium and rate of adsorption are studied through isotherm and kinetics studies, fitting Freundlich and pseudo-second order models respectively. As for the characterization of activated carbon, Fourier Transform Infrared (FTIR) detected the presence of functional groups like O-H, C=C, and C=O bonds. The adsorbent's porous surface, observed through Scanning Electron Microscopy (SEM), contributes to its substantial pollutant adsorption capacity.
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