Modesto, Helen R.
Lemos, Sherlan G.
dos Santos, Mikaela S.
Komatsu, Jenny S.
Carvalho, Wagner A.
Carrilho, Elma N. V. M.
Total Authors: 8
 Univ Fed Sao Paulo, Dept Chem, BR-09913030 Diadema, SP - Brazil
 Univ Fed ABC, Ctr Nat & Human Sci, BR-09210580 Santo Andre, SP - Brazil
 Univ Fed Sao Paulo, Inst Sci & Technol, BR-12231280 Sao Jose Dos Campos - Brazil
 Univ Fed Sao Carlos, Dept Nat Sci Math & Educ, BR-13604900 Araras, SP - Brazil
Total Affiliations: 5
Environmental Science and Pollution Research;
n. 19, SI
Web of Science Citations:
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)