Adsorption of methylene blue using green pea peels (Pisum sativum): A cost-effective option for dye-based wastewater treatment

• Published in: Biotechnology and bioprocess engineering Vol. 17; no. 4; pp. 862 - 874
• Main Authors: Dod, Ramesh, MIT College of Engineering, Pune, India, Banerjee, Goutam, Banaras Hindu University, Varanasi, India, Saini, S., National Chemical Laboratory, Pine, India
• Format: Journal Article
• Language: English
• Published: Heidelberg The Korean Society for Biotechnology and Bioengineering 01.08.2012; Springer Nature B.V; 한국생물공학회
• Subjects: Activated carbon; Adsorbents; ADSORCION; ADSORPTION; Agitation; Analysis; Biotechnology; Carbon; Carbon (activated); Chemical precipitation; Chemistry; Chemistry and Materials Science; Civil engineering; Data processing; Dubinin-raduskevich; Dyes; Economics; Effluents; Equilibrium; Fabrics; Fourier transforms; Freundlich; green peas peels; Industrial and Production Engineering; Ion exchange; Isotherms; Langmuir; Membrane separation; Methylene blue; Nylon; Particle size; Peas; pH effects; Pisum sativum; Precipitation; Research Paper; Silk; Spectrophotometry; Studies; Surface area; Temkin; Temperature effects; Textile industry; Wastewater treatment; Water treatment; 생물공학; methylene blue; adsorption; Freundlich; Langmuir; Dubinin-raduskevich; isotherms; green peas peels; Temkin
• ISSN: 1226-8372; 1976-3816
• DOI: 10.1007/s12257-011-0614-5

Methylene blue (MB), a common toxic dye, is largely discharged from dyeing processes for acrylic, nylon, silk, and woolen fabrics in textile industries. While application of conventional removal processes like chemical precipitation, ion exchange, commercial activated carbon adsorption, etc often become cost-prohibitive, the adsorption of MB by abundantly available green pea peel (GPP: Pisum sativum) derived and acid-treated carbon (GPP-AC) has proved to be a cost-attractive option in the present study. The physicochemical and morphological characteristics of GPP-AC were examined with the help of XRD, BET surface area, SEM, and Fourier transform infrared spectrophotometry ((FT-IR) analysis. The influences of such adsorption parameters as initial dye concentration, pH, contact time, adsorbent dosage, agitation speed, particle size, and temperature were evaluated and optimized. The equilibrium contact time for maximum adsorption of MB on to GPP-AC was found to be 7 h. The equilibrium data of the adsorption process were modeled by using the Langmuir, Freundlich, Temkin, and Dubinin-Raduskevich (D-R) isotherms. However, the adsorption equilibrium data were best described by the Langmuir Isotherm model, with a maximum adsorption capacity of 163.94 mg MB/g GPP-AC at 30℃.