Preparation method of magnetic nanometer material for treating 2-chlorine-3-pyridinecarbaldehydes waste
A pyridine formaldehyde, magnetic nanotechnology, applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of affecting adsorption efficiency, easy loss, affecting water quality, etc., and achieve the effect of wide concentration range
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example 1
[0023] Place 1.5g tetrabutylammonium phosphate and 4.5g cobalt nitrate hexahydrate in a 100mL beaker, add 5.0mL concentrated nitric acid, 30mL deionized water, stir and dissolve; place the mixture solution in an ultrasonic water bath with a frequency of 30KHz for 2h , Add 10mL of sodium hydroxide solution with a concentration of 1.0mol / L, and use an external magnetic field to separate and dry the resulting paste to obtain Co 2 O 3 Precipitation: The precipitate obtained above was washed with acetone and deionized water three times in sequence, and then placed in 50 mL of 0.2mol / L NaBH 4 Activated in the solution for 2h, filtered by a microporous membrane, and separated by a magnetic field to obtain Co 2 O 3 The solid powder was dried in a vacuum drying oven at a constant temperature of 130°C for 30 minutes, cooled to room temperature, and 15 mL of triethanolamine with a concentration of 1.5 mol / L was added; in an ultrasonic water bath with a frequency of 20 KHz for 20 minutes, se...
example 2
[0027] Put 2.5g of tetrabutylammonium phosphate and 5.0g of cobalt nitrate hexahydrate in a 100mL beaker, add 6.0mL of concentrated nitric acid and 35mL of deionized water in sequence, after stirring and dissolving, place the mixture solution in an ultrasonic water bath with a frequency of 30KHz 2.5h, add 12mL of sodium hydroxide solution with a concentration of 1.0mol / L, and use an external magnetic field to separate and dry the resulting paste to obtain Co 2 O 3 precipitation. The precipitate obtained above was washed with acetone and deionized water three times in turn, and placed in 50 mL with a concentration of 0.3mol / LNaBH 4 After activation treatment in solution for 2.5h, after filtration by microporous membrane, Co 2 O 3 The solid powder was dried in a constant temperature vacuum drying oven at 130°C for 38 minutes, cooled to room temperature, and 18 mL of triethanolamine at a concentration of 1.5 mol / L was added. Finally, it was separated in an ultrasonic water bath wit...
example 3
[0031] Put 3.0g tetrabutylammonium phosphate and 5.5g cobalt nitrate hexahydrate in a 100mL beaker, add 6.5mL concentrated nitric acid and 40mL deionized water successively, stir and dissolve, then place the mixture solution in an ultrasonic water bath with a frequency of 30KHz 3h, add 13mL of sodium hydroxide solution with a concentration of 1.0mol / L, use an external magnetic field to separate and dry the resulting paste to obtain Co 2 O 3 precipitation. The precipitate obtained above was washed with acetone and deionized water 3 times each, and then placed in 50mL with a concentration of 0.4mol / LNaBH 4 Activated in the solution for 3 hours, filtered by a microporous membrane, and separated by a magnetic field to obtain Co 2 O 3 The solid powder was dried in a thermostatic vacuum drying oven at 130°C for 45 minutes, cooled to room temperature, and 22 mL of triethanolamine with a concentration of 1.5 mol / L was added. Finally, it was separated in an ultrasonic water bath with a f...
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