Novel preparation process of heavy metal absorbent
An adsorbent and heavy metal technology, which is applied in the direction of adsorption of water/sewage treatment, water/sludge/sewage treatment, water pollutants, etc., can solve the problems of high cost, unsuitable for large-scale application, low treatment efficiency, etc., and achieve cost The effect of low cost and simple manufacturing method
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Embodiment 1
[0018] Take an appropriate amount of waste potato dregs, wash them with tap water first, then wash them with distilled water, dry them at 80°C until they reach a constant weight, grind them into powder, pass through a 60-mesh sieve, collect the powder, weigh 50g of the obtained powder and soak In deionized water, add 2 mL each of the activated 0.01 mol / L amylase solution and protease solution, react at 35-50 ° C for 1 hour, then add 10 mL of 0.05 mol / L NaOH solution, react for 50 minutes, and then use h 2 SO 4 Neutralize the solution, filter the neutralized liquid, and then dry it; mix the dried powder and urea in a mass ratio of 1:1, then re-immerse in deionized water, react at 50°C for 6 hours, filter, Afterwards, wash with deionized water three times to remove residual ionic liquid, and then wash with 95% alcohol twice, after washing, put it into an electric heating constant temperature drying oven at 50°C to dry to obtain the heavy metal adsorbent.
Embodiment 2
[0020] Take an appropriate amount of waste potato dregs, wash them with tap water first, then wash them with distilled water, dry them at 80°C until they reach a constant weight, grind them into powder, pass through a 60-mesh sieve, collect the powder, weigh 50g of the obtained powder and soak In deionized water, add 2 mL of activated 0.05 mol / L amylase solution and 2 mL of protease solution, react at 35-50 ° C for 2 hours, then add 10 mL of 0.1 mol / L NaOH solution, react for 50 minutes, and then use h 2 SO 4 Solution neutralization. Filter the neutralized liquid, and then dry it; mix the dried powder and urea in a mass ratio of 1:1, then re-immerse in deionized water, react at 50°C for 8 hours, filter, and then use deionized Wash with water for 3 times to remove residual ionic liquid, and then wash with 95% alcohol for 2 times. After washing, put it into an electric heating constant temperature drying oven at 50°C to dry to obtain the heavy metal adsorbent.
Embodiment 3
[0022] Take an appropriate amount of waste potato slag, wash it with tap water first, then wash it with distilled water, dry it at 80°C to a constant weight, grind the dried product into powder, pass through a 60-mesh sieve, collect the powder, add an appropriate amount of deionized water, Add 2 mL of activated 0.05 mol / L amylase solution and 2 mL of protease solution, react at 50 °C for 2 hours, then add 5 L of 0.1 mol / L NaOH solution, react for 1 hour, and then use H 2 SO 4 Neutralize the solution, filter the neutralized liquid with a plate-and-frame compressor, and then dry it; mix the dried powder and urea at a mass ratio of 1:1, put it into a 3-ton sanitary tank, and inject it into a deionized tank water, kept at 50°C for 8 hours, filtered, washed with deionized water 4 times to remove residual ionic liquid, and dried at 50°C after washing to obtain the heavy metal adsorbent.
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