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Method for quickly removing refractory organic matter in wastewater through activation of persulfate by hollow cobalt-rich bimetallic sulfide

A persulfate and bimetallic technology, applied in the field of environmental pollution control, can solve the problems of large amount of catalyst and oxidant, high treatment cost, long action time, etc., to achieve improved chemical kinetics effect, stable material structure, and fast reaction speed Effect

Inactive Publication Date: 2018-12-28
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent No. 201710371696.2 discloses a method of synergistically removing low-concentration antibiotics in water by using In-Co MOFs to adsorb and activate persulfate, but the action time is long and the treatment efficiency is low
Patent No. 201510487197.0 discloses a method for manganese-cobalt composite oxide to activate persulfate to degrade organic wastewater, but the amount of catalyst and oxidant is large and the treatment cost is high
[0004] So far, there is no report on the removal of refractory organics in wastewater by activating persulfate with hollow cobalt-rich bimetallic sulfide materials.

Method used

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  • Method for quickly removing refractory organic matter in wastewater through activation of persulfate by hollow cobalt-rich bimetallic sulfide
  • Method for quickly removing refractory organic matter in wastewater through activation of persulfate by hollow cobalt-rich bimetallic sulfide
  • Method for quickly removing refractory organic matter in wastewater through activation of persulfate by hollow cobalt-rich bimetallic sulfide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Prepare 55mg / L sulfamethoxazole solution at room temperature, take 50mL of the solution in a 100mL Erlenmeyer flask, add 5mg (Mn:Co=1:20) hollow cobalt-rich bimetallic sulfide, and stir thoroughly.

[0041] (2) Add 25mg KHSO to the reaction system 5 , samples were taken at regular intervals, quenched with methanol, and the residual sulfamethoxazole concentration was determined using an instrument. See the experimental results figure 1 . Among them, C 0 is the initial concentration, C is the final concentration, C / C 0 Indicates the degradation rate. The same below.

Embodiment 2

[0043] (1) Prepare 55mg / L sulfamethoxazole solution at room temperature, take 50mL of the solution in a 100mL conical flask, add 5mg (Mn:Co=1:1) hollow cobalt-rich bimetallic sulfide, and stir well.

[0044] (2) Add 25mg KHSO to the reaction system 5 , samples were taken at regular intervals, quenched with methanol, and the residual sulfamethoxazole concentration was determined using an instrument. See the experimental results figure 1 .

Embodiment 3

[0046](1) Prepare 55mg / L sulfamethoxazole solution at room temperature, take 50mL of the solution in a 100mL Erlenmeyer flask, add 5mg (Mn:Co=1:9) hollow cobalt-rich bimetallic sulfide, and stir well.

[0047] (2) Add 25mg KHSO to the reaction system 5 , samples were taken at regular intervals, quenched with methanol, and the residual sulfamethoxazole concentration was determined using an instrument. See the experimental results figure 1 .

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Abstract

The invention belongs to the field of environmental pollution treatment and particularly relates to a method for quickly removing refractory organic matter in wastewater through activation of persulfate by hollow cobalt-rich bimetallic sulfide. MOF formed by dimethylimidazole and bimetallic nitrate is adopted as a precursor, then, the bimetallic sulfide is prepared through a solvothermal vulcanization reaction, and finally, a stable hollow crystal structure is formed through calcination. Under the wide pH condition, the prepared hollow cobalt-rich bimetallic sulfide is added to wastewater containing the refractory organic matter and can activate persulfate to quickly produce free sulfate radicals, and the refractory organic matter can be efficiently removed within 10 min. Compared with theprior art, the method has the advantages that the hollow cobalt-rich bimetallic sulfide is convenient to prepare, stable in structure, low in dosage, high in efficiency and applicable to wide pH ranges and has superior economic and technological advantages.

Description

technical field [0001] The invention belongs to the field of environmental pollution control, and relates to a technology for advanced oxidation treatment of refractory organic matter in wastewater, in particular to a preparation method and application of a hollow cobalt-rich bimetallic sulfide. Background technique [0002] Refractory organic matter is difficult to decompose through biological action under natural conditions, and they are often gradually concentrated through the food chain, which easily causes great harm to the environment and ecology. Therefore, it is of great significance to use efficient and economical methods to control the pollution of refractory organic compounds in the water environment. [0003] In recent years, advanced oxidation technology based on sulfate radical has been widely used in the treatment of refractory organic matter. Due to the high redox potential of the sulfate radical (E 0 =2.5~3.1V), and has a longer half-life and higher stabil...

Claims

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Application Information

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IPC IPC(8): B01J27/043B01J37/03B01J37/10B01J37/20C02F1/72C02F101/34C02F101/38
CPCC02F1/725B01J27/043B01J37/031B01J37/10B01J37/20C02F2101/38C02F2101/34C02F2101/40
Inventor 刘福强江昊朱长青袁冉冉程松袁媛李爱民
Owner NANJING UNIV
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