Method for preparing magnetic attapulgite clay loaded with composite photocatalyst

Abstract

The invention discloses a method for preparing magnetic attapulgite clay loaded with a composite photocatalyst. The method comprises the following steps: (a) mixing attapulgite clay powder with water, and performing stirring and drying so as to obtain purified attapulgite clay; (b) adding the purified attapulgite clay into a hydrochloric acid solution, performing washing with pure water, adding silver nitrate, and performing heating drying and screening so as to obtain acid modified attapulgite; (c) putting the acid modified attapulgite into an FeCl3 solution, performing soaking and ultrasonic dispersion, adding the FeCl3 solution, performing ultrasonic dispersion, dropping ammonia water, performing ultrasonic treatment, performing centrifugation, and performing washing till being neutral so as to obtain magnetic attapulgite clay; (d) adding the magnetic magnetic attapulgite clay into an absolute ethyl alcohol solution, performing ultrasonic washing, further adding zinc nitrate hexahydrate and ferric chloride hexahydrate, stirring the components sufficiently, dropping NaOH, and adjusting the pH value; further performing centrifugation, washing and drying, further mixing the components with hexadecyl trimethyl ammonium bromide, distilled water and absolute ethyl alcohol, and performing alternative centrifugal washing, suction filtration and drying with distilled water and absolute ethyl alcohol, thereby obtaining the magnetic attapulgite clay loaded with the composite photocatalyst. The magnetic attapulgite clay is very good in adsorption property and carrier property.

Description

technical field [0001] The invention relates to a preparation method of magnetic attapulgite clay loaded with composite photocatalyst, belonging to the technical field of sewage treatment. Background technique [0002] In recent years, there have been reports on the use of attapulgite as an adsorbent to treat industrial wastewater. Attapulgite is a kind of water-rich township silicate clay mineral with excellent adsorption performance and certain ion exchange capacity. The activated attapulgite has a good adsorption and purification effect on heavy metal ions, and has the characteristics of high treatment efficiency and low adsorption cost. [0003] When attapulgite clay is used as an adsorbent to remove heavy metal pollution from water bodies, acid activation, alkali activation, salt activation and heat activation are generally performed on attapulgite clay. The removal mechanism of this method is generally electrostatic adsorption, ion exchange and other effects. Althou...

AI Technical Summary

Problems solved by technology

However, nano-ZnO used for photocatalysts has the problem of difficult recovery, and these photocatalysts will be dispersed in aqueous solution, so there are disadvantages in recovery and reuse.