Decolorization of Malachite green dye using seaweed

Abstract

The potential use of seaweed Sargassum crassifolium to decolorize Malachite Green dye (MG) in a batch process has been investigated in the current study. Adsorbent dosage, contact duration, initial dye concentration, as well as temperature were examined as influencing factors for adsorption. Optimizing the initial pH (2 – 12), temperature (20 – 38°C), initial concentration of dye (10 – 30 mg/L) as well as adsorbent dose (0.4 – 2.4 g) at varying time intervals led to an increase in the decolorization efficiency. The percentage of dye adsorption was calculated using standardized colorimetric procedures. The highest degree of decolorization was observed at an initial pH of 8, dye concentration of 10 mg/L, a biosorbent dosing of 2 g, contact temperature of 35°C, at a contact period of 150 min. The findings have indicated that the research is a useful alternative technique in minimizing damage to the ecosystem.