Effect of removing cadmium with citric acid on the physicochemical and microstructure properties of rice bran. (April 2019)

• Record Type: Journal Article
• Authors: Zou, Yucheng; Zhang, Cheng; Ju, Xingrong; Wang, Zhigao; Wu, Ying; Yuan, Jian; Chen, Wenye; He, Rong
• Is Part Of: Food control. Volume 98(2019)
• Page Start: 290
• Page End: 296
• Publication Date: 2019-04
• Subjects: Rice bran -- Citric acid -- Removal of cadmium -- Physicochemical property -- Microstructure property; Food -- Quality -- Periodicals; Food -- Analysis -- Periodicals; Food handling -- Periodicals; Food industry and trade -- Quality control -- Periodicals; Aliments -- Industrie et commerce -- Qualité -- Contrôle -- Périodiques; Aliments -- Qualité -- Périodiques; Aliments -- Analyse -- Périodiques; Hygiène alimentaire -- Périodiques; Food -- Analysis; Food handling; Food -- Quality; Periodicals; Electronic journals; 664.07
• DOI: 10.1016/j.foodcont.2018.11.044
• Languages: English
• ISSNs: 0956-7135

Abstract

Abstract: Rice bran, a resource-rich and nutritionally valuable by-product of rice milling, was contaminated seriously by cadmium in many parts of the world. An efficient and economical method to reduce Cd from Cd-contaminated rice bran, citric acid treatment, was developed in this study. Evaluations the effect of this method on physicochemical and structure properties of rice bran were performed. The results showed that a significant decrease of Cd was reached by 0.15 M of citric acid with 60 min incubation at 40 °C. The optimal liquid–solid ratio was 15 mL/g. The Cd removal efficiency was more than 94%. Citric acid treatment had a significantly effect on the proximate compositions of rice bran. Moreover, the oil yield, total tocopherol and γ-oryzanol contents of citric acid treated rice bran were higher than the native rice bran whereas fatty acids compositions were not changed by citric acid treatment. FT-TR data showed the chemical structure of rice bran was not significantly changed. Although X-ray diffraction results indicated that citric acid treatment increased the cellulose crystallinity, it did not affect RB downstream utilization. Highlights: A method to reduce cadmium from Cd-contaminated RB with CA treatment was developed. Cd removal with more than 94% efficiency in RB after CA treatment. The physicochemical and microstructure properties of RB and CATRB were measured. Downstream utilization of Cd-contaminated RB will be improved.