Iron-titanium-manganese composite oxide modified carbon nanotube as well as preparation method and application thereof
A technology of composite oxides and carbon nanotubes, applied in chemical instruments and methods, water pollutants, and other chemical processes, can solve problems such as by-product pollution, and achieve safe and pollution-free use, high removal efficiency, and convenient use Effect
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Embodiment 1
[0068] (1) In an ice-water bath (0°C), add CNTs into a beaker with a volume ratio of concentrated sulfuric acid and concentrated nitric acid of 3:1 according to the final concentration in the system of 10 g / L, ultrasonically for 15 minutes, and then continue to stir for 10 minutes; then follow the system Add KMnO to the final concentration of 30g / L 4 , continue to stir for 2h; move the obtained mixture to a 50°C constant temperature water bath, and react for 3h; and then magnetically stir at 65°C for 1.5h to obtain the mixture 1.
[0069] (2) According to the ratio of mixed solution 1 and deionized water as 2:5, add the mixed solution into deionized water for dilution, and then add H with a concentration of 30% by volume according to the volume ratio of 1:35 under magnetic stirring. 2 o 2 The solution was kept stirring for 10 min to obtain the mixed solution 2, which was suction-filtered and washed three times with deionized water and ethanol respectively. Finally, the mater...
Embodiment 2
[0076] The As(III) in the river water is about 0.1-0.2 mg·L due to the illegal discharge of the raw water of a certain drinking water by the production enterprise -1 , which seriously threatens the safety of water intake and water use. Under normal circumstances, the pH of the river water is about 7 to 7.5. The iron-titanium-manganese composite oxide-modified carbon nanotubes prepared in Example 1 are used to treat the As(III) pollution of the above-mentioned drinking water raw water, specifically as follows: add 2g L after water intake -1 The iron-titanium-manganese composite oxide modified carbon nanotubes, after testing and treatment, the effluent can meet the drinking water quality standard of As(III)≤10ppb. 0.5g·L -1 ~1.5g·L -1 The effluent treated by the iron-titanium-manganese composite oxide meets the drinking water quality standard of As(III)≤10ppb.
[0077] Processing power test:
[0078] In order to study the impact of the dosage of iron-titanium-manganese compo...
Embodiment 3
[0081] A preparation method of iron-titanium-manganese composite oxide modified carbon nanotubes, the difference between this embodiment and embodiment 1 is that the titanium trichloride solution added in the step (2) is that the final concentration in the system is 20g / L, The temperature of heating and stirring in step (1) is 60° C., and other steps and parameters are the same as in Example 1.
[0082] Detect the iron-titanium-manganese composite oxide modified carbon nanotubes obtained in Example 3 to the As(III) removal rate of 10mg / L, when the dosage is 3.0g L -1 , the removal rate reached 97.8%.
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