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Iron-doped birnessite modification method, modified iron-doped birnessite and application of modified iron-doped birnessite

A birnessite and iron doping technology, applied in water/sewage treatment, chemical instruments and methods, oxidized water/sewage treatment, etc., can solve the problem that total nitrogen is difficult to meet the discharge standard, cannot be converted into nitrogen, water pollutants, etc. problems, to achieve cost savings, high-efficiency catalytic oxidation capacity, and low energy consumption

Pending Publication Date: 2021-07-30
BEIJING ORIGINWATER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of iron-doped birnessite modification method, modified iron-doped birnessite and its application, through the proposal of iron-doped birnessite modification method to solve the problems existing in the prior art The iron-doped birnessite catalyst is not selective for the oxidation of ammonia nitrogen, and its oxidation product is nitrate ion, which cannot be converted into nitrogen gas, which brings new pollutants to the water body and the technical problem that the total nitrogen is difficult to meet the emission standard

Method used

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  • Iron-doped birnessite modification method, modified iron-doped birnessite and application of modified iron-doped birnessite
  • Iron-doped birnessite modification method, modified iron-doped birnessite and application of modified iron-doped birnessite
  • Iron-doped birnessite modification method, modified iron-doped birnessite and application of modified iron-doped birnessite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Preparation of modified iron-doped birnessite (1):

[0061] Configure 900mL, 0.5mol / L potassium permanganate solution;

[0062] Configure 1L mixed solution containing 0.35mol / L manganese chloride and 0.35mol / L ferrous chloride, and adjust the pH value of the mixed solution to 2 with 1M hydrochloric acid;

[0063] Slowly add the prepared potassium permanganate solution dropwise into the mixed solution of manganese chloride and ferrous chloride. After the dropwise addition, continue to stir for 2 hours. After the dropwise addition, seal the beaker and let it stand for 50 minutes. After the reaction is complete, filter , and washed with deionized water to obtain iron-doped birnessite.

[0064] Weigh 80g of iron-doped birnessite, add 80mL, 30% hydrogen peroxide dropwise to the surface of iron-doped birnessite, during the dropping process, keep stirring, after the dropping, seal for 2h, wash, Filtrate to obtain the modified iron-doped birnessite (1).

[0065] The obtained...

Embodiment 2

[0076] Preparation of modified iron-doped birnessite (2):

[0077] Configure 900mL, 0.5mol / L potassium permanganate solution;

[0078] Configure 1L mixed solution containing 0.35mol / L manganese chloride and 0.35mol / L ferrous chloride, and adjust the pH value of the mixed solution to 2 with 1M hydrochloric acid;

[0079] While stirring, slowly add the prepared potassium permanganate solution dropwise into the mixed solution of manganese chloride and ferrous chloride. After the dropwise addition, continue to stir for 2 hours. After the dropwise addition, seal the beaker and let it stand for 50 minutes. When complete, filter and wash with deionized water to obtain iron-doped birnessite.

[0080] Weigh 80g of iron-doped birnessite, add 150mL, 30% hydrogen peroxide dropwise to the surface of iron-doped birnessite, during the dropping process, keep stirring, after the dropping, seal for 2h, wash, Filtration to obtain the modified iron-doped birnessite (2).

[0081] The obtained m...

Embodiment 3

[0089] Preparation of modified iron-doped birnessite (3):

[0090] Configure 900mL, 0.5mol / L potassium permanganate solution;

[0091]Configure 1L mixed solution containing 0.35mol / L manganese chloride and 0.35mol / L ferrous chloride, and adjust the pH value of the mixed solution to 2 with 1M hydrochloric acid;

[0092] Slowly add the prepared potassium permanganate solution dropwise into the mixed solution of manganese chloride and ferrous chloride. After the dropwise addition, continue to stir for 2h. After the dropwise addition, seal the beaker and let it stand for 50min. After the reaction is completed, Filtration and washing with deionized water yielded iron-doped birnessite.

[0093] Weigh 80g of iron-doped birnessite, add 200mL, 30% hydrogen peroxide dropwise to the surface of iron-doped birnessite, during the dropping process, keep stirring, after the dropping, seal for 2h, wash, Filtration to obtain the modified iron-doped birnessite (3).

[0094] The obtained modif...

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Abstract

The invention belongs to the technical field of sewage treatment agents, and relates to an iron-doped birnessite modification method, modified iron-doped birnessite and application of the modified iron-doped birnessite. The method comprises the following preparation steps of: preparing iron-doped birnessite; and pressing the prepared iron-doped birnessite into a cake, dropwise adding hydrogen peroxide to the cake-shaped iron-doped birnessite, performing a reaction, washing, and carrying out suction filtration to obtain the modified iron-doped birnessite. An iron-doped birnessite catalyst has no selectivity on oxidation of ammonia nitrogen in the prior art, as a result, an oxidation product is nitrate ions, and the product cannot be converted into nitrogen, new pollutants are brought to a water body, andthe total nitrogen is difficult to reach the emission standard. With theiron-doped birnessite modification method, the modified iron-doped birnessite and the application of the modified iron-doped birnessite adopted, the problems can be solved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment agents, in particular to a method for modifying iron-doped birnessite, modified iron-doped birnessite and applications thereof. Background technique [0002] With the continuous development of society, the water pollution problem has constituted a serious threat to the national economy and people's living environment. Ammonia nitrogen is the main pollution indicator. If the ammonia nitrogen content exceeds the standard, the concentration of dissolved oxygen in the water will decrease, the water body will become black and smelly, the water quality will decrease, and the survival of aquatic animals and plants will be endangered. Therefore, reducing ammonia nitrogen is one of the key ways to ensure the improvement of water quality. Catalytic oxidation is a new type of high-efficiency water treatment technology that has developed rapidly in recent years. It is mainly a method of catalytic oxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J35/02C02F1/72C02F101/16C02F101/38B01J35/00
CPCB01J23/8892C02F1/725C02F2101/16C02F2101/38C02F2209/14C02F2209/15B01J35/40
Inventor 李锁定孟佳意莫恒亮陈亦力刘曼曼张金星许效锐
Owner BEIJING ORIGINWATER TECH CO LTD
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