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Modified medical stone filter material for treating ammonia-nitrogen industrial wastewater and preparation method of modified medical stone filter material

A technology of industrial wastewater and medical stone, which is applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of limited removal capacity and unsatisfactory effect of modification technology, so as to improve the removal capacity , No secondary pollution, increase the effect of surface active groups

Inactive Publication Date: 2021-01-08
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] It can be seen that in the prior art, when using natural medical stone to treat pollutants such as ammonia nitrogen in the water body, the removal capacity is quite limited, and this problem can be improved by modifying the filter material, but the existing modification technology has Problems with unsatisfactory results

Method used

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  • Modified medical stone filter material for treating ammonia-nitrogen industrial wastewater and preparation method of modified medical stone filter material
  • Modified medical stone filter material for treating ammonia-nitrogen industrial wastewater and preparation method of modified medical stone filter material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] a. Wash the medical stone with an average particle size of 1.1mm with deionized water, add 0.1mol / L hydrochloric acid solution, the mass ratio of medical stone and hydrochloric acid solution is 1:7; soak for 2h, filter out Washing with deionized water several times to obtain acid-treated medical stone;

[0034] b. Add the acid-treated medical stone prepared in step a into the mixed solution composed of carboxymethyl chitosan, sodium alginate and water, heat and stir, the temperature is 70°C, the stirring speed is 560r / min, the time 4h; after the end, filter out to obtain medical stone with surface active groups; wherein, 34 parts by weight of medical stone, 14 parts by weight of carboxymethyl chitosan, 2 parts by weight of sodium alginate, and 100 parts by weight of water ;

[0035] c, according to the mass ratio of medical stone with active groups on the surface, sodium hydroxide solution is 1:7, the medical stone with surface active group that step b makes is added t...

Embodiment 2

[0037] a. Wash the medical stone with an average particle size of 0.8mm with deionized water, add 0.1mol / L hydrochloric acid solution, the mass ratio of medical stone and hydrochloric acid solution is 1:5; soak for 1h, filter out Washing with deionized water several times to obtain acid-treated medical stone;

[0038] b. Add the acid-treated medical stone prepared in step a into the mixed solution composed of carboxymethyl chitosan, sodium alginate and water, heat and stir, the temperature is 50°C, the stirring speed is 500r / min, the time 5h; after the end, filter out to obtain medical stone with surface active groups; wherein, 30 parts by weight of medical stone, 10 parts by weight of carboxymethyl chitosan, 1 part by weight of sodium alginate, and 120 parts by weight of water share;

[0039] c, according to the mass ratio of medical stone with surface active group, sodium hydroxide solution is 1:5, the medical stone with surface active group that step b makes is added the s...

Embodiment 3

[0041] a. Wash the medical stone with an average particle size of 1.2mm with deionized water, add 0.1mol / L hydrochloric acid solution, the mass ratio of medical stone and hydrochloric acid solution is 1: 10, soak for 3h, filter out Washing with deionized water several times to obtain acid-treated medical stone;

[0042] b. Add the acid-treated medical stone prepared in step a into the mixed solution composed of carboxymethyl chitosan, sodium alginate and water, heat and stir, the temperature is 90°C, the stirring speed is 600r / min, the time 3h; filter out after the end, and obtain medical stone with surface active groups; wherein, 40 parts by weight of medical stone, 20 parts by weight of carboxymethyl chitosan, 3 parts by weight of sodium alginate, 120 parts by weight of water ;

[0043] C, according to the mass ratio of medical stone with surface active group, sodium hydroxide solution is 1: 10, the medical stone with surface active group that step b makes is added the sodi...

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Abstract

The invention discloses a modified medical stone filter material for treating ammonia-nitrogen industrial wastewater and a preparation method of the modified medical stone filter material. The modified medical stone filter material is prepared by the steps of a, cleaning medical stone, and adding a hydrochloric acid solution for soaking to obtain acid-treated medical stone; b, adding into a mixedsolution consisting of carboxymethyl chitosan, sodium alginate and water, heating, stirring and reacting to obtain medical stone with a surface active group; and c, adding into a sodium hydroxide solution, soaking, reacting, filtering, adding a magnesium ammonium phosphate sinter and sodium bicarbonate, carrying out mold pressing, and drying to obtain the modified medical stone filter material fortreating ammonia-nitrogen industrial wastewater. The method has the beneficial effects that the medical stone filter material prepared by the method has surface active groups and good adsorption performance, not only can the adsorption effect of medical stone on ammonia and nitrogen be exerted, but also the removal capacity of the medical stone on ammonia and nitrogen in water can be improved through the adsorbability of the added magnesium ammonium phosphate sinter when the medical stone filter material is used for treating the ammonia -nitrogen wastewater. Meanwhile, the preparation processis simple, and the modified medical stone filter material is safe and environment-friendly and does not generate secondary pollution.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a filter material for ammonia nitrogen sewage treatment, in particular to a modified medical stone filter material for treating ammonia nitrogen industrial wastewater and a preparation method thereof. Background technique [0002] Ammonia nitrogen is one of the common pollutants in water bodies, mainly from chemical fertilizers, coking, petrochemicals, pharmaceuticals, food, landfills, etc. The discharge of a large amount of ammonia nitrogen wastewater into water bodies not only causes eutrophication of water bodies, black and smelly water bodies, and excessive ammonia nitrogen content It will cause eutrophication of water body, cause black and odorous water body and mass death of fish, and even cause poisonous effect on people and organisms, causing serious environmental pollution problems. Therefore, the treatment of ammonia nitrogen wastewater has become a key issue in today's s...

Claims

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Application Information

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IPC IPC(8): B01J20/16C02F1/28B01J20/30C02F101/16C02F101/38
CPCB01J20/165C02F1/281C02F2101/16C02F2101/38
Inventor 陈庆曾军堂司文彬白涛
Owner CHENDU NEW KELI CHEM SCI CO LTD
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