Gamma irradiated orange peel for Cr(VI) bioreduction. Issue 15 (13th October 2017)

• Record Type: Journal Article
• Authors: Lugo-Lugo, Violeta; Ureña-Núñez, Fernando; Barrera-Díaz, Carlos
• Is Part Of: Separation science and technology. Volume 52:Issue 15(2017)
• Page Start: 2443
• Page End: 2455
• Publication Date: 2017-10-13
• Subjects: Cr(VI) reduction -- hydrolysis -- γ irradiation -- orange peel; Separation (Technology) -- Periodicals; 660.284205
• DOI: 10.1080/01496395.2017.1302477
• Languages: English
• ISSNs: 0149-6395

Abstract

ABSTRACT: This work presents the γ irradiation (600–3500 kGy) and acid hydrolysis onto orange peel for hexavalent chromium removal. SEM, AFM, TGA-DSC, FTIR, and UV-Vis showed that γ rays enhance degradation and cleavage of orange peel cellulose polymeric chains, increasing the presence of reducing sugars after acid hydrolysis (0.1552 g/g biomass, 3500 kGy). Bioreduction kinetics of Cr(VI) using both solid and solubilized liquid fractions of γ irradiated biomass showed a direct correlation between the applied dose and Cr(VI) removal, reaching 100% of Cr(VI) reduction at pH 2 and 3500 kGy. Cr(VI) reduction is explained as a function of hydrolyzed reducing sugar oxidation.