Decolorizing of Malachite Green Dye and Methyl Orange Dye by Adsorption Using Seagrass as Adsorbent Material
DOI:
https://doi.org/10.61952/jlabw.v1i3.198Keywords:
Salinity, proline, maize, growth and yield components, photosynthetic pigments, osmoprotectantsAbstract
Abstract:
Water pollution caused by various contaminants has become a significant global environmental concern. Among these, dyes constitute a major group of pollutants. Addressing natural waste treatment and the removal of harmful dyes from water through adsorption are pressing environmental challenges today. Traditional adsorbents often struggle to remove these harmful dyes effectively, as their hydrophilic properties and strong bonds with water molecules keep the dyes dissolved in water. As a result, there is an urgent need to develop new, efficient adsorbents that can reduce wastewater treatment costs and mitigate the health risks associated with waterborne contaminants. In this study, the influence of key operating parameters—such as initial dye concentration (10–70 mg/L), contact time (0–120 minutes), adsorbent dosage (0.15–0.35 g), and pH level (3–9)—was examined in a batch system. The adsorption data were successfully characterized using Langmuir and Freundlich isotherm models. Additionally, adsorption kinetics were analyzed through pseudo-first-order and pseudo-second-order models to evaluate the behavior of Malachite Green (MG) and Methyl Orange (MO). The findings revealed that removal efficiency improved with increased adsorbent dosage, prolonged contact time, and higher pH levels. However, efficiency decreased with higher dye concentration . Regression analysis confirmed that the adsorption data aligned well with both Langmuir and Freundlich isotherm models. The kinetic analysis indicated that the adsorption process followed the pseudo-second-order model.
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