固废制备沸石分子筛及其对水中孔雀石绿的去除吸附动力学研究

Preparation of Zeolite Molecular Sieve from Solid Waste and Its Adsorption-Removal Kinetics for Malachite Green in Water

摘要: 本文研究了以煤矸石和铝灰为主要原料合成沸石分子筛，并探讨了该分子筛对水中孔雀石绿(MG)的吸附性能。煤矸石和铝灰中含有丰富的二氧化硅和氧化铝，是合成分子筛的理想材料。通过水热法合成的NaP型分子筛表现出良好的结晶度和均匀的球状颗粒形貌。实验表明，分子筛对MG的吸附受分子筛用量、搅拌时间的影响。在吸附动力学研究中，拟二级动力学模型比拟一级模型更适合描述MG的吸附过程，表明该过程主要为化学吸附。此外，颗粒内扩散也对吸附起到了一定作用。这一研究为固体废弃物的资源化利用提供了新的思路，同时也为水体污染治理提供了潜在的解决方案。

Abstract: In this paper, zeolite molecular sieve was synthesized from coal gangue and aluminum ash, and the adsorption performance of the zeolite to malachite green (MG) in water was investigated. Coal gangue and aluminum ash contain rich silica and alumina and are ideal materials for synthesis of molecular sieves. NaP molecular sieves synthesized by hydrothermal method showed good crystallinity and uniform spherical particle morphology. The results showed that the adsorption of MG by molecular sieve was significantly affected by the amount of molecular sieve and the stirring time. In the study of adsorption kinetics, the pseudo-second-order kinetic model is more suitable to describe the adsorption process of MG than the first-order model, indicating that the process is mainly chemisorption. In addition, intra-particle diffusion also plays a role in adsorption. This research provides a new idea for the resource utilization of solid waste, and also provides a potential solution for water pollution control.