柠檬酸溶液脱色过程的研究

Decoloring Process in Citric Acid Liquor

用 Ｋ１５ 活性炭 （直径０５ ｍ ｍ ） 对柠檬酸溶液进行脱色， 测定在２０℃、４０℃、５０℃不同时间下的吸光度，用 Ｂａｎｇｈａｍ 方程的积分式进行拟合， 得出３ 个温度下的吸附脱色动力学方程。根据微孔吸附扩散模型， 求得液相有效扩散系数为１９８×１０－ １２ ｍ

K15 active carbon in 0 5 mm diameter was used to decolor citric acid liquor.The absorbance of the solution in different time at 20℃,40℃,50℃ was measured. The kinetic equations of adsorption decoloring at three temperatures were obtained by fitting the experimental data with Bangham's integral equation. By adopting the micropore adsorption diffusion model,the effective diffusional coefficient was calculated as 1 98×10 -12 m 2/s.