Preparation method of adsorption material with high selectivity on different heavy metal ions
A technology for heavy metal ions and adsorption materials, applied in the fields of environmental chemistry and engineering, to achieve the effects of easy elution and recovery, high efficiency and low cost
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Embodiment 1
[0017] Implementation Example 1 for Cu 2+ Preparation of materials with highly selective adsorption
[0018] Weigh 500g of montmorillonite soil, calcinate at 300°C for 4 hours, grind, and pass through a 200-mesh sieve. Add 100 g of activated montmorillonite into the reaction vessel, add 1 L of deionized water, beating, and then add 20 mL of hydrochloric acid with a concentration of 1 mol / L, 40 g of double distilled aniline, 5 g of initiator, 5 mL KH-570, and a small amount of ammonium persulfate, slowly stir the polymerization reaction for 6 hours. The reaction product is filtered, washed with water, dried and ground in sequence, and then passed through a 150-mesh sieve.
[0019] In the reactor, 50 g of the above polymer powder and 150 mL of Cu with a concentration of 150 mg / L 2+ Mix the solution uniformly, adjust the pH value of the system to 6 with NaAC-HAC buffer solution, stir slowly at 50℃, react for 40 min, and then repeatedly wash with deionized water until no Cu is...
Embodiment 2
[0021] Implementation example 2 for Cr 3+ Preparation of materials with highly selective adsorption
[0022] Weigh 500g of montmorillonite soil, calcinate at 300°C for 4 hours, grind, and pass through a 200-mesh sieve. Add 100 g of activated montmorillonite into the reaction vessel, add 1 L of deionized water, beating, and then add 20 mL of hydrochloric acid with a concentration of 1 mol / L, 30 g of double distilled aniline, 5 g of initiator, 5 mL KH-570, and a small amount of ammonium persulfate, slowly stir the polymerization reaction for 6 hours. The reaction product is filtered, washed with water, dried and ground in sequence, and then passed through a 150-mesh sieve.
[0023] In the reactor, 50 g of the above polymer powder and 150 mL of Cr with a concentration of 100 mg / L 3+ Mix the solution uniformly, adjust the pH value of the system to 5 with NaAC-HAC buffer solution, stir slowly at 50℃, react for 40 min, and then repeatedly wash with deionized water until Cr is no...
Embodiment 3
[0025] Implementation example 3 To Cu 2+ Preparation of materials with highly selective adsorption
[0026] Weigh 500g of nano-silica, calcinate at 400°C for 2 h, grind, and pass through a 200-mesh sieve. Add the activated 100g of nano-silica into the reaction vessel, inject 200 mL of deionized water, and beat the slurry. Dissolve 10 g of chitosan in 300 mL of 0.1 mol / L acetic acid solution, add it to the above reactor, and then add 5 mL of silane coupling agent to the reactor, keep stirring, and after 4 hours of reaction, pump Filter, wash, dry, and grind. Weigh 50g of the above materials and 100 mL of Cu with a concentration of 200 mg / L 2+ Mix the solution, adjust the pH value of the system to 6 with NaAC-HAC buffer solution, react at 50°C for 40 min, and then repeatedly wash with deionized water until no Cu can be detected 2+ , Drying and grinding. Take 50g of the above Cu 2+ The chelating adsorption material is placed in 100 mL of absolute ethanol, 20 mL of epichl...
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