A method for the enrichment of p-chlorophenol organic pollutants in titanium dioxide self-assembled microcapsules
An organic pollutant, titanium dioxide technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, water pollutants, etc., can solve the problems of long treatment period, complex matrix interference, complicated operation, etc., to achieve a good enrichment index, enrichment short time effect
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Embodiment 1
[0046] Embodiment 1 (product preparation):
[0047] A titanium dioxide self-assembled microcapsule, the preparation steps of which are as follows:
[0048] (1) Preparation of amphiphilic titanium dioxide particles:
[0049] 2g TiO 2 Dissolved in 8g of 1mol / L hydrochloric acid solution to prepare 20wt% TiO 2 Suspension, then add 50mL of methanol solvent to it, stir evenly and heat up to 45°C, called solution A; dissolve 0.98g of hexadecyltrimethoxysilane and 12.73mL of silane coupling agent KH-792 in 10mL of methanol solvent After stirring evenly, add it dropwise to the solution A which has been heated to 45°C, keep the temperature at 45°C, and continue the magnetic stirring reaction for 16h. After the reaction was completed, it was centrifuged, and the obtained solid was washed three times with toluene, and vacuum-dried at 60° C. for 48 hours to obtain amphiphilic titanium dioxide particles.
[0050] (2) Preparation of titanium dioxide self-assembled microcapsules:
[0051]...
Embodiment 2
[0056] Embodiment 2 (microcapsule morphology observation):
[0057] A self-assembled microcapsule of amphiphilic titanium dioxide, the preparation steps of which are as follows:
[0058] (1) Preparation of amphiphilic titanium dioxide particles:
[0059] The preparation method is the same as step (1) of Example 1.
[0060] (2) Preparation of titanium dioxide self-assembled microcapsules:
[0061] Take 5 mg of the amphiphilic titanium dioxide particles obtained in step (1) and put them in a test tube, add 2 ml of water, and disperse fully by ultrasonic; then add 200 μl of dodecane to the test tube, place it in a tumbler and turn it at a speed of 80 rad / min for 2 hours.
[0062] Observing the microcapsule morphology formed in step (2) under a fluorescence microscope, obtained Figure 5 It is found that its size is between 100 μm and 500 μm, and the position of the microcapsule formed by it is on the water surface and is a white emulsion. It is observed through a microscope th...
Embodiment 3
[0063] Embodiment 3 (simulation application experiment): the application experiment of titanium dioxide self-assembled microcapsules enriching low concentration 2-CP in simulated sewage
[0064] Get eight parts of 5 mg of amphiphilic titanium dioxide particles prepared by the step (1) of Example 1, place them in eight test tubes respectively, add 2 ml of o-chlorophenol (2-CP) solution with a concentration of 20 mg / L, and fully ultrasonically Disperse; then add 200μl cyclohexane, n-hexane, n-heptane, dodecane, n-hexanol, n-octanol, oleic acid and no oil phase to the eight test tubes respectively, and place them in a tumbler at 80rad / min The speed is turned over for 24 hours, and the enrichment reaches equilibrium.
[0065] High performance liquid chromatography was used to detect the concentration of 2-CP in the organic phase and the residual water phase to evaluate the enrichment effect.
[0066] Figure 6 It is a comparison chart of the enrichment effect of low-concentratio...
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