大孔树脂对紫甘薯色素的静态吸附参数研究

Study on the static adsorption properties and optimum parameters determination of macroporous resins to purple sweet potato pigments

选取4种大孔树脂(AB-8、S-8、NAK-Ⅱ及NKA-9)吸附紫甘薯色素,研究了大孔树脂吸附过程中的静态吸附动力学和AB-8大孔树脂的静态吸附热力学。结果表明:AB-8大孔树脂是较理想的吸附树脂,其吸附平衡速率常数为每分钟0.024 6,吸附过程和Freund lich经验公式拟合较好;当溶液的色素含量为0.992(以A535表示)、吸附温度为40℃、吸附时间为30 m in时具有最佳的吸附效果。

Static adsorption dynamics and thermodynamics of four kinds of macroporous resins, viz. , AB - 8, S - 8, NAK - Ⅱ, and NAK - 9 used in purple sweet potato pigments （PSPPs） purification were investigated in this paper. It was indieated that AB - 8 was a kind of preferable macroporous resin with the adsorption equilibrium rate constant of 0.024 6 per minute and the adsorption equation fitted the Freundlich empirical equation well. The maximum adsorption of AB - 8 to the purple sweet potato pigments was adsorbed at the content of pigment 0.992 （A535）, temperature 40 Ⅱ for 30 min.