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Persulfate activator and its preparation method and application

A persulfate oxidation and persulfate technology, applied in chemical instruments and methods, nickel compounds, inorganic chemistry, etc., can solve the problems of limiting persulfate oxidation capacity, low utilization rate of activated carbon, and harsh operating conditions, etc. To achieve the effect of convenient industrial utilization, improved activation effect, and simple preparation process

Active Publication Date: 2021-06-25
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Heat-activated persulfate technology consumes a lot of energy, light-activated persulfate technology is harsh on operating conditions, alkali-activated persulfate technology will lead to high pH in water, and activated carbon activated persulfate technology does not have a high utilization rate of activated carbon
Compared with other activation methods, transition metal ion activation has low equipment requirements, low energy consumption, and easy operation. Currently, ferrous ion activated persulfate is the most widely used transition metal ion, but there are certain disadvantages in using ferrous ion activation. The stable existence of ferric ions requires acidic conditions and a high pH requirement, and when the ferrous ions are excessive, they will compete with pollutants for sulfate radicals, which limits the oxidation ability of persulfate

Method used

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  • Persulfate activator and its preparation method and application
  • Persulfate activator and its preparation method and application
  • Persulfate activator and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A persulfate activator of the present invention is Ni 0.2 Fe 2.8 o 4, made by:

[0029] (1) Weigh 0.2g nickel nitrate, 1.8g ferric nitrate and 2.0g polyvinyl alcohol to grind in agate mortar, wherein the mol ratio of nickel in nickel nitrate and iron in ferric nitrate is 0.2: 2.8, polyvinyl alcohol The ratio of the mass sum of nickel nitrate and iron nitrate is 1:1.

[0030] (2) Place the mixture obtained after being uniformly ground in step (1) in a crucible, pour 15ml of deionized water into it, put it into a muffle furnace for calcination after being mixed evenly, and control the temperature rise rate of the muffle furnace to be 10°C / min, kept at 500°C for 30 minutes, and the calcined product was cooled and ground to obtain the Ni 0.2 Fe 2.8 o 4 Persulfate Activator.

Embodiment 2

[0032] A persulfate activator of the present invention is Ni 0.4 Fe 2.6 o 4 , made by:

[0033] The preparation method of the persulfate activator of the above-mentioned present embodiment is basically the same as in Example 1, and its difference is only in that: in step (1), the mol ratio of the nickel in the nickel nitrate and the iron in the ferric nitrate is 0.4: 2.6 , the Ni of this example is obtained after preparation 04 Fe 2.6 o 4 Persulfate Activator.

Embodiment 3

[0035] A persulfate activator of the present invention is Ni 0.6 Fe 2.4 o 4 , made by:

[0036] The preparation method of the persulfate activator of the above-mentioned present embodiment is substantially the same as in Example 1, and its difference is only in that: in step (1), the mol ratio of the nickel in the nickel nitrate and the iron in the ferric nitrate is 0.6: 2.4 , the Ni of this example is obtained after preparation 0.6 Fe 2.4 o 4 Persulfate Activator.

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Abstract

The invention discloses a persulfate activator and its preparation method and application. The persulfate activator is Ni x Fe 3‑ x o 4 , wherein, x is 0.2-0.8. The preparation method comprises: calcining the slurry obtained after mixing nickel source, iron source, polyvinyl alcohol and water to obtain the persulfate activator. Using the persulfate activator to activate persulfate to oxidatively degrade tetracycline can overcome the deficiencies in the prior art that the ferrous salt activates persulfate to remove antibiotic wastewater with a narrow pH range and low removal efficiency. The persulfate activator also has the advantages of stable catalytic performance, good activation effect, strong corrosion resistance, environmental protection, and recyclability.

Description

technical field [0001] The invention belongs to the technical field of organic wastewater treatment, and in particular relates to a persulfate activator as well as its preparation method and application. Background technique [0002] Advanced oxidation technology is a new type of technology developed in recent years for the treatment of refractory organic pollutants. It has the advantages of short cycle, quick effect, low cost, and good treatment effect. It has become a research topic in the field of medical wastewater treatment at home and abroad. Hotspots and Frontiers. In particular, compared with traditional advanced oxidation technologies such as Fenton’s method, activated persulfate advanced oxidation technology has the advantages of strong stability, good solubility, wide applicable pH range and long life of sulfate radicals, which is more conducive to high Degradation of concentrated organic pollutants. [0003] Under normal temperature conditions, persulfate is re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72C01G53/00C02F101/34C02F101/38
Inventor 袁兴中管仁鹏陈晓红吴志斌曾光明
Owner HUNAN UNIV