Composite material with enrichment effect on titanium and vanadium in water and preparation method thereof
A composite material and function technology, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve the problems of reduced enrichment capacity, chitosan loss, poor titanium adsorption capacity, etc., to achieve good environmental friendliness, The effect of mild reaction conditions and good adsorption performance
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Embodiment 1
[0025] Example 1: Composite material with enrichment effect on titanium and vanadium in water
[0026] Get 5.00g chitosan and dissolve into 250mL volume fraction and be 3% acetic acid aqueous solution, configure the chitosan solution of mass volume fraction 2.0%, stir until fully swollen, obtain the chitosan solution after swelling.
[0027] Get activated carbon 3.30g, join in the chitosan solution after swelling, stir evenly. Then slowly add 50 mL of 25% glutaraldehyde aqueous solution by volume fraction, stir evenly while adding, and the mixed solution slowly forms a viscous colloid. Place the viscous colloid in a constant temperature water bath at 70°C±2°C for 2 hours to form granular colloid. The granular colloids are first washed with 0.1mol / L NaOH solution once, then washed with high-purity water until neutral after vacuum filtration, and dried in an oven at 80°C to form dispersed small granular materials, which are lowered to At room temperature, the dispersed small g...
Embodiment 2
[0030] Example 2 The solution pH range of the composite material that has enrichment effect on titanium and vanadium in water to adsorb metal ions
[0031] Add Ti and V standard solutions to high-purity water, respectively, so that the concentration of both in the aqueous solution is 100 μg / L. The pH value of the solution is adjusted by dilute nitric acid and dilute ammonia water, so that the pH value of the aqueous solution is 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, and 9.0, respectively. Weigh 250 mg of the composite material having an enrichment effect on titanium and vanadium in water from Example 1 and put it into an empty enrichment column, wash the enrichment column with 5 mL of 2% nitric acid by volume concentration, and then wash it with high-purity water until neutral.
[0032] 60 mL of the above-mentioned solution containing Ti and V with adjusted pH value was injected into the enrichment column through a peristaltic pump at a flow rate of 5 mL / min for adsorption. Collect th...
Embodiment 3
[0033] Example 3 The desorption of the composite material adsorbing metal ions with enrichment effect on titanium and vanadium in water
[0034] 250 mg of the composite material having an enrichment effect on titanium and vanadium in water of Example 1 was used as a filler to fill the enrichment column, and 60 mL of solutions with pH values of 4, 6, 7 and 9 were respectively adsorbed. The concentrations of Ti and V in the solution were both 100 μg / L, and the solution flow rate was 5 mL / min.
[0035] Using 5mL of nitric acid with a volume concentration of 5% and 10% respectively as the desorption solution, the metal ions adsorbed on the enrichment column were injected into the enrichment column through a peristaltic pump at a flow rate of 5mL / min for desorption. Collect and measure the concentration of metal ions in each desorption solution. The desorption efficiency of the desorption solution was calculated based on the ratio of the mass of metal ions in the desorption solu...
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