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

Gamma Irradiation Induced Degradation of Orange Peels

1,2,* , 1,* , 3
,
1
,
4
 and
4
1 Faculty of Chemistry, Autonomous University of the State of Mexico, Paseo Colón esq., Paseo Tollocan s/n, Col. Residencial Colón, C.P. 50120 Toluca, Estado de México, Mexico 2 Division of Industrial Engineering, Technological of Superior Studies of Jocotitlan, Carretera Toluca-Atlacomulco Km 44.8, Ejido San Juan y San Agustín, C.P. 50700 Jocotitlán, Estado de México, Mexico 3 Faculty of Wood Engineering and Technology, University Michoacana of San Nicolas of Hidalgo, Edif. D, Cd. Universitaria, C.P. 58060 Morelia, Michoacán, Mexico 4 Faculty of Chemical Engineering, University Michoacana of San Nicolas of Hidalgo, Edif. V-1, Cd. Universitaria, C.P. 58060 Morelia, Michoacán, Mexico
* Authors to whom correspondence should be addressed.
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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Abstract

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 (CC BY 3.0).
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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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