Sewage dephosphorizing agent, preparation method and application thereof
A phosphorus removal agent and sewage technology, which is used in water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc. It can solve the problems that restrict the application of chemical phosphorus removal method, poor phosphorus removal effect, and high phosphorus removal cost. problem, to achieve the effect of small dosage, rapid reaction and high phosphorus removal efficiency
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[0039] The present invention also provides a kind of preparation method of above-mentioned sewage dephosphorization agent, comprises the following steps:
[0040] A) stirring and mixing polyacrylamide, sodium acetate and water to obtain the first mixed solution;
[0041] B) stirring and mixing the first mixed solution with the aluminum salt and the iron salt to obtain a second mixed solution;
[0042] C) stirring and mixing the second mixed solution with absolute ethanol, after hydrothermal reaction, drying to obtain a phosphorus removal agent for sewage.
[0043] In the present invention, the polyacrylamide, sodium acetate and water are first stirred and mixed to obtain the first mixed solution. In some embodiments of the present invention, polyacrylamide, sodium acetate solid and deionized water are stirred and mixed to obtain a first mixed solution.
[0044] In the present invention, the weight average molecular weight of the polyacrylamide is preferably 8 million to 16 m...
Embodiment 1
[0071] Put polyacrylamide and sodium acetate solids with a weight average molecular weight of 8 million in the reaction vessel, the mass ratio of the polyacrylamide and sodium acetate is 0.1:0.2, then add deionized water to the reaction vessel, the The mass ratio of the deionized water to the polyacrylamide and sodium acetate was 40:1, and the polyacrylamide and sodium acetate solids were completely dissolved by stirring to obtain a first mixed solution.
[0072] Add aluminum sulfate octadecahydrate and ferric chloride hexahydrate into the first mixed solution, stir and mix to obtain the second mixed solution. The mass ratio of the aluminum sulfate octadecahydrate to the first mixed solution is 8:100, and the mass ratio of the ferric chloride hexahydrate to the first mixed solution is 5:100. The mass ratio of the aluminum sulfate octadecahydrate to the polyacrylamide is 8:0.5.
[0073] Add anhydrous ethanol to the second mixed solution, stir and mix for 0.5 h, hydrothermally ...
Embodiment 2
[0075] Put polyacrylamide and sodium acetate solids with a weight average molecular weight of 12 million in the reaction vessel, the mass ratio of the polyacrylamide and sodium acetate is 0.4:0.5, then add deionized water to the reaction vessel, the The mass ratio of the deionized water to the polyacrylamide and sodium acetate was 40:1, and the polyacrylamide and sodium acetate solids were completely dissolved by stirring to obtain a first mixed solution.
[0076] Add aluminum sulfate and ferric chloride into the first mixed solution, stir and mix to obtain the second mixed solution. The mass ratio of the aluminum sulfate to the first mixed solution is 15:100, and the mass ratio of the ferric chloride to the first mixed solution is 7.5:100. The mass ratio of the aluminum sulfate to the polyacrylamide is 15:0.5.
[0077] Add anhydrous ethanol to the second mixed solution, stir and mix for 0.8h, hydrothermally react at 100°C for 4h, cool naturally to room temperature, filter to...
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