A kind of bentonite adsorption metal ion and its regeneration method
A technology of metal ions and bentonite, applied in separation methods, filter regeneration, chemical instruments and methods, etc., can solve problems such as increasing the amount and cost of bentonite, a large amount of waste acid or alkali, and secondary pollution
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Embodiment 1
[0020] To 1000mL100mgL -1 15g of calcium-based bentonite was added to the copper sulfate solution, and after being adsorbed for 8 hours under stirring conditions, it was centrifuged, and the remaining Cu in the solution was determined by atomic adsorption spectrometry. 2+ concentration. Then, redisperse the obtained bentonite in 300mL of distilled water, then add 150mL of ethanol, 150mL of n-ethane and 1.5g of sodium oleate, reflux and stir at 70°C for 2h, let it cool down, then transfer the solution system to the liquid separation In the funnel, separate the water phase and the oil phase; centrifuge the lower water phase, wash the precipitate with water and centrifuge again, dry it at 60°C for 12 hours and grind it to obtain the regenerated bentonite; wash the upper oil phase with distilled water, Stand still, remove the lower aqueous phase, repeat 2 or 3 times, and then spin evaporate at 60°C and recover the organic solvent, and at the same time obtain a blue-green viscous ...
Embodiment 2
[0022] To 1000mL100mgL -1 15g of calcium-based bentonite was added to the nickel nitrate solution, and after being adsorbed for 8 hours under stirring conditions, it was centrifuged, and the remaining Ni in the solution was determined by atomic adsorption spectrometry. 2+concentration, then redisperse the obtained bentonite in 300mL distilled water, then add 150mL ethanol, 150mL n-ethane and 1.5g sodium oleate, reflux and stir at 70°C for 2h, let it stand until cooling, then transfer the solution system to In the liquid funnel, separate the water phase and the oil phase; centrifuge the lower water phase, wash the precipitate with water and centrifuge again, dry it at 60°C for 12 hours and grind it to obtain the regenerated bentonite; wash the upper oil phase with distilled water , stand still, remove the lower aqueous phase, repeat for 2 or 3 times, then spin evaporate at 60°C and recover the organic solvent, and at the same time obtain green viscous nickel oleate; after that,...
Embodiment 3
[0024] To 1000mL100mgL -1 15g of calcium-based bentonite was added to the cobaltous chloride solution, and after being adsorbed for 8 hours under stirring conditions, it was centrifuged, and the remaining Co in the solution was determined by atomic adsorption spectrometry. 2+ concentration, then redisperse the obtained bentonite in 300mL of distilled water, then add 150mL of ethanol, 150mL of n-ethane and 1.5g of sodium oleate, reflux and stir at 70°C for 2h, let it stand until it cools down, then transfer the solution system to In a separatory funnel, separate the water phase and the oil phase; centrifuge the lower water phase, wash the precipitate with water and centrifuge again, dry it at 60°C for 12 hours and grind it to obtain the regenerated bentonite; wash the upper oil phase with distilled water Washing, standing still, separating the lower aqueous phase, repeating 2 or 3 times, then rotating at 60 ° C and recovering the organic solvent, and simultaneously obtaining pu...
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