期刊论文

Zhu, Yuchan(zhuyuchan@163.com)

中文

化工进展

1000-6613

2016

35

1

320-326

10.16085/j.issn.1000-6613.2016.01.044

2012FFB04803:湖北省自然科学基金 2012Y05:大学科研项目 31101370:国家自然科学基金

本校为第一机构

制备了改性介孔分子筛NH_3~+-MCM-41,研究了其对阴离子偶氮染料甲基红的吸附效果。研究表明,通过氨基改性使介孔分子筛MCM-41表面电荷发生改变,从而利用静电吸附作用改善了脱除效果,使甲基红吸附率提高了1.1倍,达到90.4%。溶液pH值的改变会影响NH_3~+-MCM-41的表面电荷,从而影响吸附效率,其最佳pH值为4。溶液中的杂质离子均会对吸附产生影响,当溶液中含有Cl~-、NO_3~-时,对吸附效果影响不大;而当溶液中含有CO_3~(2-)和HPO_4~(2-)等高价弱酸根离子时,对吸附效果影响很大,基本不吸附染料。此外,通过其吸附动力学研究发现,吸附过程中不符合准一级动力学模型,而较好符合准二级动力学,说明在该过程中...

The adsorption efficiency of the anionic azo dye (methyl red) on amino-modified ordered mesoporous silica (NH3+-MCM-41) have been investigated. The research results indicate that the surface charge of MCM-41 are redistributed after the amino modification. By means of the electrostatic effect, the adsorption efficiency of methyl red on NH3+-MCM-41 was 90.4% which was 1.1 times more than that on the unmodified MCM-41. The pH value of the solution determines the surface charge of NH3+-MCM-41 and then affects the adsorption efficiency, and the optimal pH value is 4. The impurity ions in the methyl...