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Gamma Irradiation Induced Degradation of Orange Peels
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
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
Faculty of Wood Engineering and Technology, University Michoacana of San Nicolas of Hidalgo, Edif. D, Cd. Universitaria, C.P. 58060 Morelia, Michoacán, Mexico
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; in revised form: 21 July 2012 / Accepted: 1 August 2012 / Published: 14 August 2012
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
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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.
Sánchez Orozco R, Balderas Hernández P, Flores Ramírez N, Roa Morales G, Saucedo Luna J, Castro Montoya AJ. Gamma Irradiation Induced Degradation of Orange Peels. Energies. 2012; 5(8):3051-3063.
Sánchez Orozco, Raymundo; Balderas Hernández, Patricia; Flores Ramírez, Nelly; Roa Morales, Gabriela; Saucedo Luna, Jaime; Castro Montoya, Agustín Jaime. 2012. "Gamma Irradiation Induced Degradation of Orange Peels." Energies 5, no. 8: 3051-3063.