Preparation method of water purification carbon composite material with low nano zero-valent iron and nano-silver loading capacities
A technology of nano-zero-valent iron and carbon composite materials, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of low removal efficiency of lead ions and cadmium ions, reduce the risk of loss, improve Environmental and economic benefits, efficient removal effect
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Embodiment 1
[0052] This embodiment provides a method for preparing a water purification carbon composite material with low nanometer zero-valent iron and nanometer silver loading, the method comprising the following steps:
[0053] S1. Screen activated carbon particles with a particle size of 1.0-1.5 mm, clean them with deionized water, and dry them for later use.
[0054] S2. Weigh FeSO according to the mass ratio of iron element to activated carbon as 1:100 4 ·7H 2 O, add 100mL volume ratio of ultrapure water and absolute ethanol mixed solvent of 8:2, and polyethylene glycol-200 of 0.1g, stirrer speed is 400r / min, room temperature, feed N 2 , the reaction time was 120min, and a mixed solution was prepared. Polyethylene glycol-200 as used herein refers to polyethylene glycol with molecular weight not greater than 200.
[0055] S3. Add 20 g of the cleaned activated carbon particles into the mixed solution prepared in step S2 and stir for 120 minutes.
[0056] S4. Add 100mL sodium boro...
Embodiment 2
[0065] This embodiment provides a method for preparing a water purification carbon composite material with low nanometer zero-valent iron and nanometer silver loading, the method comprising the following steps:
[0066] S1. Screen activated carbon particles with a particle size of 1.0-1.5 mm, clean them with deionized water, and dry them for later use.
[0067] S2, according to the mass ratio of iron element and activated carbon as 1:200, take FeSO 4 ·7H 2 O, add 100mL volume ratio of ultrapure water and absolute ethanol mixed solvent of 8:2, and polyethylene glycol-200 of 0.1g, stirrer speed is 400r / min, room temperature, feed N 2 , and the reaction time was 120min to prepare a mixed solution. Polyethylene glycol-200 as used herein refers to polyethylene glycol with molecular weight not greater than 200.
[0068] S3. Add 40 g of the cleaned activated carbon particles into the mixed solution prepared in step S2 and stir for 120 minutes.
[0069] S4. Add 100mL sodium borohy...
Embodiment 3
[0078] This embodiment is a research experiment on the application of low-nano zero-valent iron and nano-silver loading water purification carbon composite materials. This embodiment mainly uses low-concentration Pb in drinking water 2+ and Cd 2+ As the research object, the adsorption performance of the composite material was studied in a constant temperature oscillator by static adsorption test. The experimental condition is C 0 =100ppb, the amount of composite material added is 1.0g / L, the pH value of the solution is 6.0, and the ionic strength is C NaNO3 =0.01M.
[0079] like Figure 10 and Figure 11 As shown, among them, Figure 10 Composite material and former activated carbon that are prepared for embodiment 1 and embodiment 2 are to Pb 2+ The removal efficiency comparison chart, Figure 11 For the composite material and former activated carbon obtained in embodiment 1 and embodiment 2 to Cd 2 + Comparison chart of removal efficiency. From Figure 10 and Fi...
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