Preparation method and regeneration method of composite ammonia nitrogen adsorbent
An adsorbent and composite technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of limiting the application of ammonia nitrogen wastewater, adsorption rate and regeneration rate are not ideal, and achieve excellent ammonia nitrogen adsorption The effect of increasing the amount, increasing the adsorption amount and adsorption rate, and increasing the adsorption capacity
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Embodiment 1
[0032] Add 10 g of a mixture containing 10% diatomaceous earth, 10% activated carbon, and 80% zeolite into 100 mL of NH 4 Cl and KH 2 PO 4 Each 1 mol / L solution was stirred for 1 h; 5 mol / L MgCl was added dropwise 2 Solution 24 mL, adjust the pH to 10 with 5 mol / L NaOH solution after the dropwise addition; after stirring for 10 min, the solid matter was collected by filtration, 40 o Dry and mature at C for 4 h, and then at 100 o The high-efficiency composite ammonia-nitrogen adsorbent 1 was obtained by roasting at C for 2 h, and the ammonia volatilized during the roasting process was absorbed by dilute sulfuric acid.
[0033] The experimental data of ammonia nitrogen adsorption and composite ammonia nitrogen adsorbent regeneration results are shown in Table 1.
Embodiment 2
[0035] Add 10 g of a mixture containing 10% activated carbon and 90% zeolite into 100 mL of NH 4 Cl and KH 2 PO 4 Each 1 mol / L solution was stirred for 1 h; 5 mol / L MgCl was added dropwise 2 Solution 24 mL, adjust the pH to 10 with 5 mol / L NaOH solution after the dropwise addition; after stirring for 10 min, the solid matter was collected by filtration, 40 o Dry and mature at C for 4 h, and then at 100 o The high-efficiency composite ammonia-nitrogen adsorbent 2 was obtained by roasting at C for 2 h, and the ammonia volatilized during the roasting process was absorbed by dilute sulfuric acid.
[0036] The experimental data of ammonia nitrogen adsorption and composite ammonia nitrogen adsorbent regeneration results are shown in Table 1.
Embodiment 3
[0038] Add 10 g of zeolite to 100 mL of NH 4 OH and KH 2 PO 4 Each 2 mol / L solution was stirred for 1 h; 10 mol / L MgCl was added dropwise 2 Solution 24 mL, adjust the pH to 10 with 5 mol / L NaOH solution after the dropwise addition; after stirring for 10 min, the solid matter was collected by filtration, 40 o Dry and mature at C for 4 h, and then at 100 o The high-efficiency composite ammonia-nitrogen adsorbent 3 was obtained by roasting at C for 2 h, and the ammonia volatilized during the roasting process was absorbed by dilute sulfuric acid.
[0039] The experimental data of ammonia nitrogen adsorption and composite ammonia nitrogen adsorbent regeneration results are shown in Table 1.
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