Gamma Irradiation Induced Degradation of Orange Peels

Energies

Raymundo Sánchez Orozco¹  Patricia Balderas Hernández¹  Nelly Flores Ramírez³  Gabriela Roa Morales¹  Jaime Saucedo Luna² 

[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] E-Mail:

[3]Faculty of Chemical Engineering, University Michoacana of San Nicolas of Hidalgo, Edif. V-1, Cd. Universitaria, C.P. 58060 Morelia, Michoacán, Mexico

[4] E-Mails:

[5]Faculty of Wood Engineering and Technology, University Michoacana of San Nicolas of Hidalgo, Edif. D, Cd. Universitaria, C.P. 58060 Morelia, Michoacán, Mexico

[6] E-Mail:

关键词: orange peel;    gamma irradiation;    cellulose;    hemicelluloses;    degradation;    reducing sugars;    fructose;   

DOI  :  10.3390/en5083051

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.