Resin base phosphorus removal absorbent and preparation method thereof
A phosphorus adsorbent, resin-based technology, applied in the field of resin-based phosphorus removal adsorption materials and its preparation, adsorption materials and its preparation, can solve the problems of complex phosphorus removal process, large amount of sludge, poor water stability, etc. Good performance and large adsorption capacity
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[0021] A resin-based phosphorus removal adsorption material and a preparation method thereof, comprising the following steps:
[0022] (a) AlCl 3 , HCl, MgCl 2 dissolved in water to obtain solution A, AlCl in solution A 3 Concentration is 0.1-0.8mol / L, HCl concentration is 1-8mol / L, MgCl 2 The concentration is 1-3mol / L;
[0023] (b) Flow solution A through the strongly basic anion exchange resin placed in the adsorption column at a certain flow rate;
[0024] (c) centrifuging and dehydrating the strongly basic anion resin obtained after the above treatment until there is no free water;
[0025] (d) MgCl 2 and NaHCO 3 Dissolve in water to obtain solution B, MgCl in solution B 2 The concentration is 0.05-0.5mol / L, NaHCO 3 The content is 1%-10%wt;
[0026] (e) Add the strongly basic anion resin after dehydration in step (c) to solution B for reaction, preferably the reaction time is 0.5-2h, filter out the resin after the reaction is completed, wash with deionized water a...
Embodiment 1
[0029] (1) In a 2000ml beaker, add 26.7gAlCl 3 , 200ml of concentrated hydrochloric acid (36.5% by weight), 95g of MgCl 2 , fully dissolved and adjusted to 1L. AlCl in this solution 3 0.2mol / L, HCl 2mol / L, MgCl 2 1mol / L.
[0030] (2) Weigh 4.75gMgCl 2 , 10g NaHCO 3 Dissolve in water, dilute to 200ml volumetric flask to obtain solution B. MgCl in the solution 2 0.25mol / L.
[0031] (3) Take 15g of IRA400 strong basic anion exchange resin and place it in a glass adsorption column, pass the above solution A through the glass adsorption column at a speed of 2BV / h, dehydrate the resin after the reaction is complete, and then quickly add it to solution B, React at room temperature for 0.5 h, filter out the resin, wash with deionized water and industrial ethanol in sequence, and heat-treat in an oven at 50° C. for 12 h. That is, the phosphorus removal adsorption material was obtained, and the content of magnesium and aluminum on the adsorption material was 29.7 mg / g.
Embodiment 2
[0033] (1) In a 2000ml beaker, add 40g of AlCl 3 , 400ml of concentrated hydrochloric acid (36.5% by weight), 190g of MgCl 2 , fully dissolved and adjusted to 1L. AlCl in this solution 3 0.3mol / L, HCl 4mol / L, MgCl 2 2mol / L.
[0034] (2) Weigh 4.75g of MgCl 2 , 10 g NaHCO 3 Dissolve in water, dilute to 200ml volumetric flask to obtain solution B. MgCl in the solution 2 0.25mol / L.
[0035] (3) Take 15g of IRA900 strong basic anion exchange resin and place it in a glass adsorption column, pass the above solution A through the glass adsorption column at a speed of 1BV / h, dehydrate the resin after the reaction is complete, and then quickly add it to solution B, React at room temperature for 1 h, filter out the resin, wash with deionized water and industrial ethanol in sequence, and heat-treat in an oven at 52° C. for 14 h. The phosphorus removal adsorption material was obtained, and the content of magnesium and aluminum on the adsorption material was 59.4 mg / g.
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