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A kind of carbonate modified carbon nitride and its preparation method and its application in the treatment of low-concentration ammonia nitrogen wastewater

A low-concentration ammonia nitrogen and wastewater treatment technology, applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of complex regeneration of zeolite, unfavorable reuse, small adsorption capacity, etc., and achieve the preparation method The effect of simplicity, reduced energy consumption, and excellent adsorption performance

Active Publication Date: 2021-06-15
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the energy consumption in this method is relatively high, and the adsorption capacity is relatively small, and the regeneration of zeolite is relatively complicated, which is not conducive to repeated utilization.

Method used

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  • A kind of carbonate modified carbon nitride and its preparation method and its application in the treatment of low-concentration ammonia nitrogen wastewater
  • A kind of carbonate modified carbon nitride and its preparation method and its application in the treatment of low-concentration ammonia nitrogen wastewater
  • A kind of carbonate modified carbon nitride and its preparation method and its application in the treatment of low-concentration ammonia nitrogen wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Weigh sodium bicarbonate and melamine (see Table 1) according to the molar ratio, and mix them uniformly, and transfer the mixture into a crucible and place it in a muffle furnace. Under the condition that the atmosphere is air, the temperature is raised to 520°C, the holding time is 4h, and naturally cooled to room temperature, the material is ground in a mortar, washed with deionized water until neutral, and the obtained powder is placed at 60°C Dry in a drying oven. The prepared sample (0.1g) was added to the solution containing 20mg / L NH 4 In the Cl solution, stir for 120min, and after standing for 20min, take the supernatant to measure the concentration of ammonia nitrogen, and the test results are listed in Table 1.

Embodiment 2

[0040] Take sodium bicarbonate and melamine (see table 1) according to mol ratio, and it is mixed homogeneously, and repeat the method for embodiment 1, only changed the mol ratio of carbonate and carbon nitride precursor, test result is in table 1 listed.

Embodiment 3

[0042] Weigh sodium carbonate and urea (see Table 1) according to the molar ratio, and mix it homogeneously, and repeat the method of Example 1, and the test results are listed in Table 1.

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Abstract

The invention provides a carbonate-modified carbon nitride and its preparation method and its application in the treatment of low-concentration ammonia-nitrogen wastewater, and relates to a preparation method of carbonate-modified carbon nitride. Carbon precursors are mixed, then calcined at 400-600°C for 1-6 hours, and then pulverized, washed and dried to obtain the carbonate-modified carbon nitride; the carbonate and carbon nitride precursor The molar ratio is (2:1) to (1:1000), preferably (0.8:1) to (1:100).

Description

technical field [0001] The invention relates to a wastewater treatment material in the field of environmental protection, in particular to a carbonate-modified carbon nitride, a preparation method thereof, and an application in low-concentration ammonia nitrogen wastewater treatment, belonging to the field of environmental protection. Background technique [0002] Ammonia nitrogen is an important pollutant in water bodies, mainly from industrial wastewater such as petrochemical, coking, and metallurgy, agricultural wastewater such as animal husbandry, and urban domestic sewage. Excessive ammonia nitrogen entering the water body will lead to eutrophication of the water body, causing deterioration of water quality, poisoning aquatic organisms, and even endangering human health. Therefore, wastewater containing excessive ammonia nitrogen needs to be treated up to the standard before it can be discharged into the environment. The economical and efficient treatment of ammonia ni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/02B01J20/30C02F1/28C02F101/16
CPCB01J20/0259B01J20/0277C02F1/281C02F2101/16C02F2303/16
Inventor 王文中孙慧张玲
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI