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Energies 2012, 5(8), 3051-3063; doi:10.3390/en5083051

Gamma Irradiation Induced Degradation of Orange Peels

1,2,* , 1,* , 3
Received: 8 June 2012 / Revised: 21 July 2012 / Accepted: 1 August 2012 / Published: 14 August 2012
(This article belongs to the Special Issue Biomass and Biofuels 2012)
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In this study, gamma irradiation induced degradation of orange peels (OP) was investigated. The lignocellulosic biomass degradation was carried out at doses of 0 (control), 600, 1800 and 3500 kGy using a Co-60 gamma radiation source. The samples were tested for total and reducing sugars. The concentrations of total sugars ranged from 0.530 g∙g−1 in control sample to 0.382 g∙g−1 of dry weight in the sample which received the highest radiation dose. The reducing sugars content varying from 0.018 to 0.184 g∙g−1 of dry weight with the largest rise occurring in the sample irradiated at 3500 kGy. The concentrations of sucrose, glucose and fructose were determined. The changes generated in physico-chemical properties were determined by Fourier Transform Infrared Spectroscopy (FTIR) and termogravimetric analysis (TG-DTG). The results show that OP was affected, but not significantly, which suggests that lignocellulose and sugars profiles were partially degraded after gamma irradiation.
Keywords: orange peel; gamma irradiation; cellulose; hemicelluloses; degradation; reducing sugars; fructose orange peel; gamma irradiation; cellulose; hemicelluloses; degradation; reducing sugars; fructose
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Sánchez Orozco, R.; Balderas Hernández, P.; Flores Ramírez, N.; Roa Morales, G.; Saucedo Luna, J.; Castro Montoya, A.J. Gamma Irradiation Induced Degradation of Orange Peels. Energies 2012, 5, 3051-3063.

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