Unlock instant, AI-driven research and patent intelligence for your innovation.

A method of catalyzing percarbonate to degrade organic pollutants in wastewater

A technology of organic pollutants and percarbonate, applied in water pollutants, chemical instruments and methods, oxidized water/sewage treatment, etc., can solve the problems of high energy consumption of physical methods, secondary pollution of metal ions, etc., and achieve activation Outstanding effect, uniform dispersion, and large specific surface area

Active Publication Date: 2019-10-15
WUHAN TEXTILE UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Physical methods have high energy consumption, while chemical methods such as transition metal ions have the possibility of secondary pollution by metal ions

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method of catalyzing percarbonate to degrade organic pollutants in wastewater
  • A method of catalyzing percarbonate to degrade organic pollutants in wastewater
  • A method of catalyzing percarbonate to degrade organic pollutants in wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Raw Materials and Reagents

[0036] Dicyandiamide (C 2 h 4 N 4 ), copper sulfate pentahydrate (CuSO 4 ·5H 2 O), sodium hydroxide (NaOH), and hydrochloric acid (HCl) were of analytical grade (AR), purchased from Sinopharm Chemical Reagent Co., Ltd.; xylitol (C 5 h 12 0 5 ), methyl orange (C 14 h 14 N 3 NaO 3 S) and others were of analytical grade (AR), purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.

[0037] Protonated g-C 3 N 4 Catalyst preparation

[0038] Preparation of g-C by High Temperature Pyrolysis of Dicyandiamide 3 N 4 . Weigh 4g of dicyandiamide and place it in a corundum crucible with a cover, and put the crucible into the muffle furnace, -1 The heating rate was programmed to raise the temperature to 550°C and keep it warm for 4 hours. After the product was naturally cooled, the obtained yellow powder was ground for 30 minutes, and the obtained preliminary product was ground for later use. Mix 10ml of concentrated sulfuric a...

Embodiment 2

[0040] Protonated g-C 3 N 4 Catalyst preparation

[0041] Preparation of g-C by High Temperature Pyrolysis of Dicyandiamide 3 N 4 . Weigh 4g of dicyandiamide and put it in a corundum crucible with a cover, and put the crucible in the muffle furnace, -1 The heating rate was programmed to raise the temperature to 600°C and keep it warm for 3 hours. After the product was naturally cooled, the obtained yellow powder was ground for 30 minutes, and the obtained preliminary product was ground for later use. Mix 10ml of concentrated sulfuric acid and add it into a 50ml flask, stir at room temperature for 8h, and sonicate for 1h. The stirred mixture is slowly poured into 100ml of deionized water while stirring. The obtained milky white suspension was centrifuged at 3000 r for 10 min and washed with deionized water. Dry at 80°C. Weigh the acidified g-C 3 N 4 Pour 0.4g into a 200ml flask, reflux at 75°C for 4h, wash with suction and dry at 80°C to obtain g-C 3 N 4 .

Embodiment 3

[0043] Protonated g-C 3 N 4 Catalyst preparation

[0044] Preparation of g-C by High Temperature Pyrolysis of Dicyandiamide 3 N 4 . Weigh 4g of dicyandiamide and place it in a corundum crucible with a cover, and put the crucible in the muffle furnace, -1 The heating rate was programmed to raise the temperature to 500°C and keep it warm for 5 hours. After the product was cooled naturally, the obtained yellow powder was ground for 30 minutes, and the obtained preliminary product was ground for later use. Mix 10ml of concentrated sulfuric acid and add it into a 50ml flask, stir at room temperature for 8h, and sonicate for 1h. The stirred mixture is slowly poured into 100ml of deionized water while stirring. The obtained milky white suspension was centrifuged at 3000 r for 10 min and washed with deionized water. Dry at 80°C. Weigh the acidified g-C 3 N 4 Pour 0.4g into a 200ml flask, reflux at 50°C for 8h, wash with suction and dry at 80°C to obtain g-C 3 N 4 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for degrading organic pollutants in wastewater by catalyzing percarbonate. The method comprises the following steps: adding a g-C3N4 catalyst which is subjected to protonation treatment into wastewater, and stirring and adsorbing to form a mixture under a dim environment; adding percarbonate into the mixture to form a reaction system; putting the reaction system within an illumination range of visible light, catalyzing and activating percarbonate by g-C3N4 to degrade organic pollutants in wastewater, wherein protonation comprises the following steps: adding concentrated sulfuric acid into blocky g-C3N4 to mix, stir and perform ultrasonic treatment, thereby obtaining a mixture; mixing the mixture with water by stirring, thereby obtaining milk white suspension liquid, centrifuging, washing and drying the milk white suspension liquid to obtain acidified g-C3N4; thermally reflowing acidified g-C3N4 for 4-8 hours at a temperature of 50-75 DEG C, performing suction filtration, washing and drying to obtain g-C3N4 subjected to protonation. According to the method disclosed by the invention, the effect of degrading the organic pollutants in wastewater is remarkable, a degradation rate is high and degradation is stable.

Description

technical field [0001] The invention belongs to the field of waste water treatment, in particular to a method for catalyzing percarbonate to degrade organic pollutants in waste water. Background technique [0002] With the rapid growth of population and the rapid development of modern industry, the problem of water pollution has become one of the keys to restrict the development of my country's economy and society, and the search for efficient water treatment technology has become a scientific problem that needs to be solved urgently for social development. [0003] Advanced oxidation processes (Advanced oxidation processes, AOPs) use the interaction between oxidants and catalysts, combined with light, ultrasound and other technologies, to generate highly active free radicals, usually OH; to oxidize macromolecular organic matter in water to low Toxic or non-toxic small molecules, even mineralized into CO 2 and H 2 O's technology. The free radicals produced in the advanced...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72C02F1/30C02F101/38C02F101/34C02F101/30
Inventor 李东亚夏东升徐海明廖伟左诗语曹刚袁向娟孙磊
Owner WUHAN TEXTILE UNIV