Method for treating chromium-containing waste water by utilizing banana skin
A technology of banana peel and banana peel powder, applied in chemical instruments and methods, adsorption water/sewage treatment, reduced water/sewage treatment, etc., can solve the problems of consuming large chemical reagents, increasing production costs, complex processes, etc. Low cost, less secondary pollution and simple process
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[0022] Example one
[0023] Step 1. Take a certain amount of banana peel powder with a particle size of 0.1cm, wash it twice with deionized water, and then send it to a drying oven at 105°C, dry it, and cool it to room temperature for use;
[0024] Step 2. Take 5g of the banana peel powder dried in step 1 and 50mL of solidified liquid (gelatin and chitosan) with a concentration of 2%, mix them uniformly to form a mixed solution, and then add 50mL of the mixed solution to a concentration of 0.1mol / L's Cacl 2 In the solution, mix evenly to form a mixture, and then make the mixture into 2mm particles for use;
[0025] Step 3: Add all the particles of the mixture with a particle size of 2mm in step 2 to 50mL Cacl with a concentration of 0.1mol / L 2 In the solution, let it stand for 12 hours, then take it out, wash twice with deionized water, filter, and dry to prepare a reducing adsorbent for use;
[0026] Step 4. Take 5g of the reducing adsorbent prepared in Step 3 and mix with 500mL of ...
Example Embodiment
[0029] Example two
[0030] Step 1. Take a certain amount of banana peel powder with a particle size of 0.3cm, wash it twice with deionized water, and then send it to a drying oven at 105°C, dry it, and cool it to room temperature for use;
[0031] Step 2. Take 10g of the banana peel powder dried in step 1 and 100mL of solidified liquid (gelatin and sodium alginate) with a concentration of 2%, mix them uniformly to form a mixed solution, and then add 100mL of the mixed solution to a concentration of 0.1mol / L's Cacl 2 In the solution, mix evenly to form a mixture, and then make the mixture into 4mm particles for use;
[0032] Step 3: Add 100mL Cacl with a concentration of 0.1mol / L to all the particles of the mixture with a particle size of 4mm in Step 2 2 In the solution, let it stand for 12 hours, then take it out, wash twice with deionized water, filter, and dry to prepare a reducing adsorbent for use;
[0033] Step 4. Take 10g of the reducing adsorbent prepared in Step 3 and mix it...
Example Embodiment
[0036] Example three
[0037] Step 1. Take a certain amount of banana peel powder with a particle size of 0.5 cm, wash it twice with deionized water and send it to a drying oven at 105°C, dry it, and cool it to room temperature for use;
[0038] Step 2. Take 20g of the banana peel powder dried in step 1 and 200mL of solidified liquid (sodium alginate and chitosan) with a concentration of 2%, mix them uniformly to form a mixed solution, and then add 200mL of the mixed solution to a concentration of 0.1 mol / L Cacl 2 In the solution, mix evenly to form a mixture, and then make the mixture into 5mm particles for use;
[0039] Step 3. Add all the particles of the mixture with a particle size of 5mm in step 2 to 200mL Cacl with a concentration of 0.1mol / L 2 In the solution, let it stand for 12 hours, then take it out, wash twice with deionized water, filter, and dry to prepare a reducing adsorbent for use;
[0040] Step 4. Take 20g of the reducing adsorbent prepared in Step 3 and mix it wit...
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