Activated carbon production from industrial yeast residue to boost up circular bioeconomy

Author(s)

Modesto, Helen R. ; Lemos, Sherlan G. ; dos Santos, Mikaela S. ; Komatsu, Jenny S. ; Goncalves, Maraisa ; Carvalho, Wagner A. ; Carrilho, Elma N. V. M. ; Labuto, Georgia

• Document type: Journal article
• Source: Environmental Science and Pollution Research; v. 28, n. 19, p. 12-pg., 2020-08-15.

Abstract

This work aims to obtain activated carbon (AC) from yeast residue to boost up bioeconomy. In this way, carbon was prepared from yeast biomass produced by the ethanol industry and after beta-glucan extraction. Carbon was activated with CO2, water vapor, and a combination of both using an experimental design. The best conditions to produce AC were activation with CO(2)for 30 min at 850 degrees C and CO(2)flow of 0.09 L/min, set by experimental design and desirability function to optimize the yield, surface area, and microporosity. Thus, for physical activation with water vapor employing the optimized conditions, it was possible to achieve a yield of 56.6% (m/m) for AC with 1144 m(2)/g of surface area and mean micropore volume of 0.53 cm(3)/g. The maximum AC surface area reached 1616 +/- 567 m(2)/g with a yield of 21 +/- 1%. The prepared ACs were characterized by elemental analysis, X-ray diffractometry, infrared spectroscopy, thermogravimetry analysis, pH(PZC), and potentiometric titration to determine the main functional groups of sorption sites. The carbon obtained from the desirability condition was used to remove dipyrone from synthetic aqueous effluent with an experimental sorption capacity of 88 +/- 4 mg/g, being the phenomenon described by the Freundlich isotherm model. (AU)

• FAPESP's process: 17/24931-4 - Polyols conversion promoted by alternative catalysts under conventional and microwave heating
• Grantee: Wagner Alves Carvalho
• Support Opportunities: Regular Research Grants
• FAPESP's process: 16/06271-4 - Development of adsorbents from yeast biomass residue from industrial fermentation processes to remove emerging contaminants from water and effluents
• Grantee: Geórgia Christina Labuto Araújo
• Support Opportunities: Regular Research Grants
• FAPESP's process: 17/13074-3 - Production and characterization of activated carbon obtained from yeast biomass residue of alcohol industry
• Grantee: Mikaela Silva dos Santos
• Support Opportunities: Scholarships in Brazil - Scientific Initiation