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.