Adsorptive separation composite fiber film, preparation method and uses thereof
A composite fiber membrane, adsorption and separation technology, applied in the direction of chemical instruments and methods, adsorption water/sewage treatment, alkali metal compounds, etc., can solve the problems of secondary pollution, loss, reunion, etc.
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Embodiment 1
[0075] 1) Disperse commercially available cellulose fiber (CF) (1g) in water (150ml), then slowly add concentrated sulfuric acid (2ml) dropwise while stirring;
[0076] 2) Add titanyl sulfate (TiOSO) dropwise to the above fiber dispersion 4 ) (0.8ml), while continuing to stir;
[0077] 3) Heating in a water bath at 70°C for 4 hours while stirring;
[0078] 4) After the reaction is completed, cool down, and then pour the reaction solution into a suction filter funnel with a diameter of 47mm for vacuum filtration to obtain a filter cake. The filter cake was taken out and then dried in a flat plate rapid heating dryer at 40°C for 8 hours to obtain TiO 2 / CF composite fiber membrane, denoted as Insitu TiO 2 / CF.
[0079] 5) Put two pieces of TiO 2 The / CF composite fiber membrane is installed in the filter as the filter medium, and the Pb with an initial concentration of 10ppm is sucked by the pump at 2.9ml / min 2+ Solution, after flowing through the filter medium, the filtra...
Embodiment 2
[0084] 1) Disperse commercially available cellulose fibers (1g) in water (200ml), then slowly add concentrated sulfuric acid (4ml) dropwise while stirring;
[0085] 2) Add TiOSO dropwise to the above fiber dispersion 4 (2.4ml), while continuing to stir;
[0086] 3) Heating in a water bath at 90°C for 3 hours while stirring;
[0087] 4) After the reaction is completed, cool down, and then pour the reaction solution into a suction filter funnel with a diameter of 47mm for vacuum filtration to obtain a filter cake. The filter cake was taken out and then dried in a flat plate rapid heating dryer at 30°C for 12 hours to obtain TiO2 / CF composite fiber membrane, denoted as Insitu TiO 2 / CF.
[0088] 5) Put a piece of TiO 2 The / CF composite fiber membrane is installed in the filter as the filter medium, and the Pb with an initial concentration of 10ppm is sucked by the pump at 5.8ml / min 2+ Solution, after flowing through the filter medium, the filtrate is collected at different...
Embodiment 3
[0091] 1) 50mg of commercially available TiO 2 (Anatase) nanoparticles were added to 200ml of deionized water, adjusted to a pH of 3, and ultrasonically dispersed for 1 hour to obtain a uniform and stable dispersion.
[0092] 2) Immerse 1 g of cellulose fibers with negatively charged surfaces in the above dispersion liquid, and let stand for 20 minutes.
[0093] 3) Pour the above reaction solution into a suction filter funnel with a diameter of 47 mm for vacuum filtration to obtain a filter cake. The filter cake was taken out and then dried in a flat plate rapid heating dryer at 50°C for 6 hours to obtain TiO 2 / CF composite fiber membrane, denoted as Anatase / CF.
[0094] 4) Put two pieces of TiO 2 The / CF composite fiber membrane is installed in the filter as the filter medium, and the Pb with an initial concentration of 10ppm is sucked by the pump at 2.9ml / min 2+ Solution, after flowing through the filter medium, the filtrate is collected at different intervals, and the ...
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