Recycling method of phosphorus in waste water
A recovery method and waste water technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., to achieve the effect of simple method, simple operation, and prevention of environmental pollution problems
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Embodiment 1
[0026] 1. Preparation of adsorption materials
[0027] Step 1, get 200g of fly ash and 1000g of 8% hydrochloric acid solution to mix, extract continuously for 2 days, stir twice a day during this period, separate the supernatant after the extraction, and obtain the extract for subsequent use;
[0028] Step 2, add dolomite to the extract prepared in step 1, add 20g of dolomite according to every liter of extract, after the dolomite is dissolved in the extract, the ratio of ferric aluminum ion and divalent calcium ion in the solution Be adjusted to 2:1, obtain the solution for subsequent use;
[0029] Step 3, add sodium hydroxide solution to the solution prepared in step 2 and slowly stir at a speed of 30 times per minute, so that the pH value of the solution is adjusted to 8.0, then stop adding sodium hydroxide solution, carry out coprecipitation and then at room temperature Aging for 5 days, to obtain sediment, standby;
[0030] Step 4. Put the precipitate obtained in Step 3...
Embodiment 2
[0037] 1. Preparation of adsorption materials
[0038] Step 1, get 150g of fly ash and 750g of 10% hydrochloric acid solution to mix, extract continuously for 3 days, stir twice a day during this period, separate the supernatant after the extraction, and obtain the extract for subsequent use;
[0039] Step 2, add limestone in the extraction solution that step 1 makes, add 20g dolomite according to every liter of extraction solution, after the dolomite is dissolved in the extraction solution, the ratio of ferric aluminum ion and divalent calcium ion in the solution is determined Adjusted to 2:1 to obtain the solution for subsequent use;
[0040] Step 3, add 1 mol L to the solution prepared in step 2 -1 The sodium hydroxide solution is slowly stirred at a speed of 30 times per minute to adjust the pH value of the solution to 8.5, then stop adding the sodium hydroxide solution, carry out co-precipitation, and then age at room temperature for one week to obtain the precipitate fo...
Embodiment 3
[0050] 1. Preparation of adsorption materials
[0051] Step 1, get 100g of fly ash and 500g of 12% hydrochloric acid solution to mix, extract continuously for 4 days, stir twice a day during this period, separate the supernatant after the extraction, and obtain the extract for subsequent use;
[0052] Step 2, add limestone in the extraction solution that step 1 makes, add 20g dolomite according to every liter of extraction solution, after the dolomite is dissolved in the extraction solution, the ratio of ferric aluminum ion and divalent calcium ion in the solution is determined Adjusted to 2:1 to obtain the solution for subsequent use;
[0053] Step 3, add 1 mol L to the solution prepared in step 2 -1 The sodium hydroxide solution is slowly stirred at a speed of 30 times per minute to adjust the pH value of the solution to 9.0, then stop adding the sodium hydroxide solution, carry out co-precipitation, and then age at room temperature for one week to obtain the precipitate fo...
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