有机胺插层四钛酸对直接湖蓝5B的吸附性能研究

在微波辅助下对四钛酸进行了有机胺插层,获得了正辛胺﹑正十二胺﹑正十六胺插层四钛酸材料,研究了3种层状物质作为吸附剂,pH﹑震荡时间﹑吸附剂用量等因素对直接湖蓝5B偶氮染料吸附的影响,确定了3种材料吸附的最佳条件。研究表明:微波有机胺插层四钛酸材料具有优良的吸附性能,pH=1.0时,正辛胺插层四钛酸用量为0.8 g/L﹑振荡时间40 min,正十二胺插层材料和正十六插层材料用量为0.4 g/L﹑振荡时间分别30 min和50 min时,吸附脱色效果最好。随染料浓度增大,温度升高,插层四钛酸材料会发生板层分离,表现为常规的物理吸附过程。在50℃时,正辛胺﹑正十二胺﹑正十六插层四钛酸对直接湖蓝5B染料的吸附量分别达到636 mg/g﹑3 349 mg/g﹑2 856 mg/g。

Adsorption Properties for Direct Sky Blue 5B by n-alkylamines-intercalated Layered Tetratitanate

Organic titanate acid was obtained by intercalation of n-CnH2n+1NH2(n=8,12,16)under microwave irradiation.The adsorption properties under various conditions such as pH value,adsorbent time and adsorbent dosage were investigated and the optimal experimental conditions were obtained.Results indicated that the grafted aminated tetratitanate acid had a higher adsorption capacity and adsorption speed for removing dyes from dye wastewater.The optimal adsorption conditions were presented for n-octylamines-intercalated layered tetratitanate at pH 1,adsorption time 40min and dosage 0.8 g/L;for n-dodecylamines-intercalated n-hexadecylamines-intercalated layered tetratitanate at pH 1.0,adsorption time 50 min and dosage 0.4 g/L.With the increase in dye concentration and temperature,the layers of n-alkylamines-intercalated tetratitanate will be separated with performance for regular physical adsorption process.The maximum adsorption capacities of direct sky blue 5B over n-CnH2n+1NH2(n=8,12,16)pillared tetratitanate were 636 mg/g,3 349 mg/g and 2 856 mg/g at 50 ℃ respectively.