膨润土对戊二醛的吸附研究

目的研究膨润土对戊二醛的吸附性能。方法分别从吸附温度、振荡时间、膨润土用量及脱附实验对膨润土吸附戊二醛性能进行全面考察,并采用一阶导数光谱法测定戊二醛的含量。结果戊二醛样品光谱的峰谷分别在221.80 nm和245.40 nm波长处。五种膨润土在35℃的水浴温度时吸附率均达到了最大值,多数土样在振荡20 m in时就可达到吸附平衡。锂皂石与钠基膨润土对戊二醛的吸附性较强,吸附后重量分别增加1.0倍和0.55倍。五种膨润土吸附戊二醛后,可在1 h内将戊二醛完全脱吸附。结论所试验的五种膨润土中,吸附戊二醛量依次为锂皂石>钠基膨润土>钙基膨润土>有机膨润土>酸化土;以锂皂石和钠基膨润土吸附戊二醛最强,但钠基膨润土综合性能最好。

THE STUDY ON ADSORPTION OF GLUTARALDEHYDE BY BENTONITE

Objective Study on adsorption of glutaraldehyde by bentonite.Methods The adsorption of glutaraldehyd by bentonite was studied comprehensivel in terms of dosage of bentonite,adsorption temperature,shaking time and desorption performance.The contents of glutaraldehyde was measured by first order derivative spectrophotometry.Results The wave crest and wave trough of glutaraldehyde sample spectra were at 221.80 nm and 245.40 nm respectively.The adsorption rate by five kinds of bentonite at 35℃ attained the maximun,the adsorption by most samples could attain equilibrium when they were oscillated for 20 min.Hectorite and Na-bentonite had more intense adsorbability than the others,the weight increased by 1.0 and 0.55 folds respectively after adsorbing glutaraldehyde.The five kinds of bentonite could desorb completely in 1 h after adsorbing glutaraldehyde.Conclusion The quantity of glutaraldehyde adsorbed by the five kinds of bentonite were: hectorite >Na-bentonite >Ca-bentonite >organobentonite >acidized active soil.Hectorite and Na-bentonite had the most powerful adsorbability to glutaraldehyde,but the comprehensive properties of Na-bentonite were the best.