Phosphorus-removing adsorbent for waterworks and preparation method thereof

Abstract

The invention discloses a phosphorus-removing adsorbent for waterworks and a preparation method thereof. The phosphorus-removing adsorbent is prepared from dead branches and leaves in gardens, potassium carbonate, diatomite, ferric chloride, chitosan, citric acid and other raw materials. The adsorbent of the invention has a moderate pore structure and abundant active adsorption sites, and producesa small amount of divalent and trivalent iron ions in phosphorus-rich water for production of iron phosphate and ferrous phosphate precipitates with phosphate radicals in the water; the obtained products are conjugated with a diatomite-coated adsorption material; and the finally obtained products are recovered in virtue of superparamagnetism. The phosphorus-removing adsorbent provided by the invention can be used as a technical solution for treating sudden phosphorus pollution in the waterworks to ensure that the quality of water supplied by the waterworks meets the standard, and has the advantages of low treatment cost, simple operation, capacity of treating the waste with the waste, and no secondary pollution.

Description

technical field

[0001] The invention relates to the technical field of water treatment, in particular to a phosphorus-removing adsorbent for a waterworks and a preparation method thereof. Background technique

[0002] In recent years, due to the impact of heavy rains and sudden non-point source environmental pollution, the problem of excessive phosphorus in water sources has become more and more prominent. Studies have shown that there is a certain relationship between the phosphorus content in drinking water and the growth of bacteria. When ρ(P) is 1-3 μg / L, phosphorus becomes the limiting factor for microbial growth in drinking water. Excessive phosphorus content can easily lead to the reproduction of microorganisms in drinking water, and it is difficult to ensure the biological stability of drinking water during the transportation process, thus threatening the safety of drinking water.

[0003] In the traditional process, the chemical coagulation dephosphorization metho...

Examples

Embodiment Construction

[0020] A kind of waterworks dephosphorization sorbent is prepared by the following method:

[0021] (1) Wash the dead branches and leaves of the garden, dry them, crush them, and put them into a carbonization furnace for carbonization at 350°C for 40 minutes. After taking them out, mix them with potassium carbonate at a mass ratio of 3.5:1, then add them to water and stir them evenly. Oscillate at constant temperature for 7 hours, then filter and dry, then send it to a high-temperature furnace for activation at 800°C for 80 minutes, take it out after cooling, wash it with water until the pH is neutral, and crush it through a 100-mesh sieve after drying;

[0022] (2) Dissolve ferric chloride in ethylene glycol at a solid-to-liquid ratio of 1:30g / mL, stir continuously until it dissolves evenly, and then add anhydrous sodium acetate and polyethylene glycol to it, in which ferric chloride, anhydrous The mass ratio of sodium acetate and polyethylene glycol is 1:2.6:0.8, heat up to ...

technical field

[0001] The invention relates to the technical field of water treatment, in particular to a phosphorus-removing adsorbent for a waterworks and a preparation method thereof. Background technique

[0002] In recent years, due to the impact of heavy rains and sudden non-point source environmental pollution, the problem of excessive phosphorus in water sources has become more and more prominent. Studies have shown that there is a certain relationship between the phosphorus content in drinking water and the growth of bacteria. When ρ(P) is 1-3 μg / L, phosphorus becomes the limiting factor for microbial growth in drinking water. Excessive phosphorus content can easily lead to the reproduction of microorganisms in drinking water, and it is difficult to ensure the biological stability of drinking water during the transportation process, thus threatening the safety of drinking water.

[0003] In the traditional process, the chemical coagulation dephosphorization metho...

Examples

Embodiment Construction

[0020] A kind of waterworks dephosphorization sorbent is prepared by the following method:

[0021] (1) Wash the dead branches and leaves of the garden, dry them, crush them, and put them into a carbonization furnace for carbonization at 350°C for 40 minutes. After taking them out, mix them with potassium carbonate at a mass ratio of 3.5:1, then add them to water and stir them evenly. Oscillate at constant temperature for 7 hours, then filter and dry, then send it to a high-temperature furnace for activation at 800°C for 80 minutes, take it out after cooling, wash it with water until the pH is neutral, and crush it through a 100-mesh sieve after drying;

[0022] (2) Dissolve ferric chloride in ethylene glycol at a solid-to-liquid ratio of 1:30g / mL, stir continuously until it dissolves evenly, and then add anhydrous sodium acetate and polyethylene glycol to it, in which ferric chloride, anhydrous The mass ratio of sodium acetate and polyethylene glycol is 1:2.6:0.8, heat up to ...