Removal of organic dyes using Fucus vesiculosus seaweed bioadsorbent an ecofriendly approach: Equilibrium, kinetics and thermodynamic studies

Abstract

Increasing industrialization leads to enhanced level of pollutants in wastewater that ultimately degrade the environment. Fucus vesiculosus, brown algae was utilized as bioadsorbent for elimination of cationic dyes from aqueous solution. The removal efficiency of F. vesiculosus seaweed bioadsorbent (FVSB) was investigated as 98.71% for Methylene Blue (MB) and 96.68% for Rhodamine B (RB). Various adsorption parameters such as adsorbent dosage, concentration, contact time, temperature and pH have been discussed in detail. The maximum adsorption capacity of MB and RB was 200 mg/g and 166.66 mg/g, respectively. The process of spontaneous and endothermic adsorption follows Langmuir adsorption isotherm and experimental data fitted well into pseudo-second-order kinetics. No remarkable loss in removal efficiency was observed after regeneration and recycling the bioadsorbent for 5 times. The bioadsorbent was also considered for removal of color from environmental sample representing significant result. FVSB could be considered as a suitable bio-adsorbent for removal of organic dyes with high efficacy as an eco-friendly and sustainable approach for water remediation.

Keywords

• Seaweed
• Dyes
• Adsorption
• Methylene blue
• Rhodamine B
• Simultaneous adsorption