Preparation method of ZnCl2-microwave activated corncob activated carbon for treating basic dye wastewater

Abstract

The invention relates to a preparation method of ZnCl2-microwave activated corncob activated carbon for treating basic dye wastewater. The preparation method comprises the following steps: step 1, pretreating raw materials; step 2, weighing the raw materials; step 3, performing heating reflux; step 4, performing microwave activation; step 5, washing and filtering; step 6, drying; and step 7, cooling and storing. The prepared activated carbon has a large number of micropore structures, the pore size distribution is uniform, the surface contains rich oxygen-containing functional groups, dye molecules can be attached and deposited on the activated carbon adsorbent easily, and the activated carbon is more suitable for adsorption. The removal rate of methylene blue dye can reach 99.9% at most,the maximum adsorption capacity can reach 440.5 mg / g, the product can be used for treating wastewater containing basic dye, and the adsorbent is simple in preparation process, low in cost, environmentally friendly and easy to popularize.

Description

technical field

[0001] The invention relates to the technical field of wastewater treatment, in particular to a ZnCl solution for treating basic dye wastewater 2 -The preparation method of microwave activated corn cob activated carbon. Background technique

[0002] Almost every industry uses dyes to color their products, and the surplus and unused dyes are released into the environment. Since the main components of dyes in printing and dyeing industrial wastewater are aromatic heterocyclic compounds, the structure is complex and stable, and it is difficult to degrade, causing great pollution to the environment, and will have a great impact on the normal operation of wastewater structures. Therefore, when wastewater is discharged to public Removal of this dye prior to water supply is a major concern today.

[0003] Wastewater treatment is the use of physical, chemical and biological methods to treat wastewater, purify wastewater, reduce pollution, and achieve wastewater rec...