Adsorptive performance of acid-treated chitin from shrimp waste for the removal of methyl orange and melanoidins from aqueous solutions

• Published in: Biomass conversion and biorefinery Vol. 15; no. 6; pp. 9705 - 9720
• Main Authors: Rahman, Sameeha Syed Abdul, Pasupathi, Saroja, Prakasan, Nambiaaruran Rajamani, Jaganathan, Jayasri, Mathivanan, Mahalakshmi, Karuppiah, Sugumaran
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.03.2025; Springer Nature B.V
• Subjects: Adsorption; Adsorptivity; Aqueous solutions; Biomass; Biorefineries; Biotechnology; Chemical treatment; Chemisorption; Chitin; Dyes; Electron microscopes; Energy; Enthalpy; Fourier transforms; Infrared analysis; Original Article; Pollutants; Renewable and Green Energy; Scanning electron microscopy; Shrimps; Wastewater; Anionic dyes; Kinetics; Adsorption; Marine wastes
• ISSN: 2190-6815; 2190-6823
• DOI: 10.1007/s13399-024-05943-1

This work aims to investigate the impact on the potential adsorption capacity of acid-treated chitin (ACHS) from shrimp waste for the removal of both methyl orange (MO) and melanoidins (MEL) from shrimp waste. The properties of ACHS were determined using different instrumentation analyses, namely Scanning Electron Microscope (SEM) and Fourier Transform Infrared (FTIR). SEM analysis showed that chemical treatment yielded more significant modification on the surface of ACHS, making it more flaky and rugged and causing more cavities. The different factors, namely dosage (1.0–10 g/L), initial pH (2.0–10.0), pollutant concentration (MO, 20–100 mg/L; MEL, 50–250 mg/L), temperature (30–60 °C), and contact time (0–120 min) on adsorption capacity and adsorption efficiency (%) to remove MO and MEL from simulated solution using ACHS, separately investigated in batch mode. Because of positive values of enthalpy change (MO, 135.78 kJ/mol; MEL, 53.93 kJ/mol), the adsorption of MO and MEL follows the chemisorption mechanism. Using the Langmuir model, the maximum adsorption capacity of ACHS was determined to be 69.93 mg/g and 32.15 mg/g to remove MO and MEL from wastewater, respectively. Due to excellent surface morphology and adsorption capacity, ACHS could be identified as a promising and cost-effective candidate for the removal of toxic pollutants from wastewater.