A kind of method and application of preparing composite phosphorus removal coagulant from phosphating wastewater
A coagulant and waste water technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve problems such as material corrosion, achieve the effects of protecting the environment, reducing toxicity, and reducing corrosion
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Embodiment 1
[0036] Embodiment 1 A kind of preparation method of the composite dephosphorization coagulant made by phosphating wastewater, comprises the steps:
[0037] 1) Dissolve 2g chitosan in 200mL acetic acid solution with a volume fraction of 2% in a beaker to prepare solution A;
[0038] 2) Take 2 g Na 2 SiO 3 9H 2 O in a beaker, add 40g of water to dissolve, add glacial acetic acid with a concentration of 99.5%, adjust pH=3, react for 4 hours, and obtain solution B;
[0039] 3) Take 1g FeSO 4 ·7H 2 O in a beaker, add 30 g of acetic acid solution with a solution volume fraction of 2%, heat to 70°C, and react for 1.5 hours to obtain solution C;
[0040] 4) Add B and C to solution A within 30 seconds, stir well, then slowly add 0.05g of oxidant H to the solution at a rate of 1 drop / second 2 o 2 , the stirring rate is 100 r / min, stirring for 1h to obtain solution D;
[0041] 5) Put solution D in a water bath for heating in a water bath, add 10g of phosphating wastewater (wastew...
Embodiment 2
[0044] Embodiment 2 A kind of preparation method of the compound dephosphorization coagulant made by phosphating wastewater, comprises the steps:
[0045] 1) Dissolve 1g of chitosan in 100mL of 2% acetic acid solution in a beaker to prepare solution A;
[0046] 2) Take 1 g of Na 2 SiO 3 9H 2 O was dissolved in a beaker by adding 20 g of water, adding glacial acetic acid with a concentration of 99.5%, adjusting the pH to 3, and reacting for 4 hours to obtain solution B;
[0047] 3) Take 2g FeSO 4 ·7H 2 O in a beaker, add 60 g of acetic acid solution with a solution volume fraction of 2%, heat to 70°C, and react for 1.5 hours to obtain solution C;
[0048] 4) Add B and C to solution A within 30 seconds, stir well, then slowly add 0.1g of oxidant H to the solution at a rate of 1 drop / second 2 o 2 , the stirring rate is 100 r / min, stirring for 1h to obtain solution D;
[0049] 5) Put solution D in a water bath for heating in a water bath, add 20g of phosphating wastewater ...
Embodiment 3
[0052] Embodiment 3 A kind of preparation method of the composite dephosphorization coagulant made by phosphating wastewater, comprises the steps:
[0053] 1) Dissolve 5g chitosan in 600mL acetic acid solution with a volume fraction of 2% in a beaker to prepare solution A;
[0054] 2) Take 4 g of Na 2 SiO 3 9H 2 O was dissolved in a beaker by adding 100 g of water, adding glacial acetic acid with a concentration of 99.5%, adjusting the pH to 3, and reacting for 4 hours to obtain solution B;
[0055] 3) Take 2g FeSO 4 ·7H 2 O in a beaker, add 80g of acetic acid solution with a solution volume fraction of 2%, heat to 70°C, and react for 1.5h to obtain solution C;
[0056] 4) Add B and C to solution A within 30 seconds, stir well, then slowly add 0.1g of oxidant H to the solution at a rate of 1 drop / second 2 o 2 , the stirring rate is 100 r / min, stirring for 4h, to obtain solution D;
[0057] 5) Put solution D in a water bath for heating in a water bath, add 20g of phosph...
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