Biochar derived from Caulerpa scalpelliformis for the removal of Reactive Yellow 81 in batch and packed bed column

• Published in: Biomass conversion and biorefinery Vol. 13; no. 3; pp. 1889 - 1903
• Main Authors: Sundar, M. Lenin, Aravindan, A., Sujatha, S., Mahendran, S., Kalyani, G., Rahman, D. Zunaithur, Vijayakumar, A., Kumar, M. Senthil
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.02.2023; Springer Nature B.V
• Subjects: Biotechnology; Correlation coefficients; Cycle ratio; Decoloring; Energy; Original Article; Packed beds; Renewable and Green Energy; Seaweeds; Packed bed column; Isotherm; Reactive yellow 81; Kinetics; biochar
• ISSN: 2190-6815; 2190-6823
• DOI: 10.1007/s13399-020-01156-4

The present study investigated the potential of biochar synthesized from Caulerpa scalpelliofrmis, a marine seaweed in the decolorization of Reactive Yellow 81 (RY81). The decolorization study was conducted in batch experiments and also in a packed bed column for continuous study. Maximum uptake of 151.5 mg/g was reported in a batch study under optimum conditions. Biosorption isotherm studies were conducted to understand the biosorption mechanism. A correlation coefficient of 0.9998 was obtained for a four-parameter model Fritz-Schlunder – IV. The kinetic study concluded that pseudo-first-order kinetics predicted the experimental data with a correlation coefficient always greater than 0.984. Desorption studies were carried out to find the best elutant, solid to liquid ratio and regeneration cycles. The maximum uptake of 122.48 mg/g was reported in a column study at optimum conditions. Yoon Nelson model predicted the experimental uptake with a correlation coefficient always greater than 0.99 and the % error was always less than 0.11.