荔枝多糖的冷电弧-光催化脱色工艺优化  

Optimization of Decolorization of Water-soluble Polysaccharides from Litchi by Non-thermal Plasma/Photocatalysis Technology

作　　者：郭刚[1] 王中来[1] 程冬洋[1] 巫启明[1] 

机构地区：[1]福州大学生物科学与工程学院,福建福州350002

出　　处：《食品科学》2011年第12期14-18,共5页Food Science

基　　金：福建省自然科学基金面上项目(2010J01286);国家大学生创新性实验计划项目(091038619)

摘　　要：设计制作冷电弧-光催化反应器,考察负载光催化剂的氧化铝填充率、电压、多糖的质量浓度和处理时间对脱色效果的影响,并运用二次回归正交旋转组合设计,建立回归模型方程确定最佳工艺条件。结果表明:在负载光催化剂的氧化铝填充率18.1%、电压21.6kV、多糖质量浓度50.0mg/mL和处理时间33.8min的条件下,脱色率和糖保留率分别达到91.2%和87.4%,效果最好。A non-thermal plasma/photocatalysis reactor,designed and fabricated in our laboratory,was used to decolorize water-soluble polysaccharides extracted from litchi flesh.Decolorization parameters such as the filling rate of alumina as a support for photocatalyst,voltage,polysaccharide concentration and treatment time were tested for their influence on decolorization efficiency.Meanwhile,a regression model was set up to describe decolorization efficiency as a function of the decolorization parameters by means of quadratic orthogonal rotary combination design.The results showed that when the filling rate of alumina,voltage,polysaccharide concentration and treatment time were 18.1%,21.6 kV,50.0 mg/mL and 33.8 min,respectively,the best decolorization results were achieved,with a decolorization efficiency of 91.2% and a polysaccharide retention rate of 87.4%.

关 键 词：荔枝 多糖 冷电弧 光催化 二次回归正交旋转组合设计 脱色 

分 类 号：TS255[轻工技术与工程—农产品加工及贮藏工程]