Method for degrading quinclorac organic pollutant based on catalysis of persulfate through load-type activated carbon

A technology of quinclorac and organic pollutants, applied in water pollutants, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as difficulty in strain screening, long degradation period, etc. The effect of simple process flow

Inactive Publication Date: 2015-12-23
HUNAN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are problems such as difficu...

Method used

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  • Method for degrading quinclorac organic pollutant based on catalysis of persulfate through load-type activated carbon
  • Method for degrading quinclorac organic pollutant based on catalysis of persulfate through load-type activated carbon
  • Method for degrading quinclorac organic pollutant based on catalysis of persulfate through load-type activated carbon

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Embodiment 1

[0026] Preparation of catalyst nitrogen, cobalt co-doped activated carbon: Take 4g flake dry KOH and grind it into powder with agate mortar. Take 8g of disodium ethylenediaminetetraacetic acid (EDTA) and put it into a mortar and grind it with KOH powder evenly, then add 0.90g of cobalt nitrate hexahydrate and grind it evenly, then fill it into 4 magnetic boats (dimensions: length×width×height) ×Thickness=60mm×30mm×15mm×2mm). Vacuum calcined at 600°C for 2h in a tube furnace. After natural cooling to room temperature, samples were washed. First put the sample into a 100mL beaker, add 50-80mL deionized water to ultrasonically clean it for 10min, then suction filter, continue to wash repeatedly with deionized water until the filtrate is clear. Finally, it was washed twice with ethanol, dried in vacuum at 80°C for 24 hours, and then ground and sieved to obtain nitrogen and cobalt co-doped activated carbon (marked as Co-N / Ac1). The catalyst has a specific surface area of ​​734m2...

Embodiment 2

[0029] Preparation of catalyst nitrogen, cobalt co-doped activated carbon: Take 4g flake dry KOH and grind it into powder with agate mortar. Take 8g of disodium ethylenediaminetetraacetic acid (EDTA) and put it into a mortar and grind it with KOH powder evenly, then add 0.90g of cobalt nitrate hexahydrate and grind it evenly, then transfer it to a rectangular quartz boat (dimensions: length × width × height × thickness =400mm×40mm×18mm×2mm). Vacuum calcined at 600°C for 2h in a tube furnace. After natural cooling to room temperature, samples were washed. First put the sample into a 100mL beaker, add 50-80mL deionized water to ultrasonically clean it for 10min, then suction filter, continue to wash repeatedly with deionized water until the filtrate is clear. Finally, it was washed twice with ethanol, dried in vacuum at 80°C for 24 hours, and then ground and sieved to obtain nitrogen and cobalt co-doped activated carbon (marked as Co-N / Ac2).

[0030] Degradation of quinclorac...

Embodiment 3

[0032] co 2+ Catalytic persulfate degradation of quinclorac organic pollutants: prepare 1.0g / L quinclorac stock solution, 1.0mmol / LCo(NO 3 ) 2 stock solution and 100mmol / L potassium persulfate (PMS) stock solution. Then pipette a certain volume of Co(NO 3 ) 2 Stock solution and PMS stock solution into the reaction vessel, so that the concentration of the two is 0.04mmol / L and 4mmol / L respectively (that is, the molar concentration ratio of the two is 1:100), and then add the quinclorac solution to the reactor Make its initial concentration 10mg / L, after shaking at room temperature for 24h, the degradation rate of quinclorac is 80%.

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Abstract

The invention discloses a method for degrading the quinclorac organic pollutant based on catalysis of persulfate through load-type activated carbon. The method comprises the steps that the load-type activated carbon serves as a catalyst, the persulfate or disulfate serves as an oxidizing agent, and the quinclorac in waste water and soil is degraded through sulfuric acid free radicals formed in the reaction process. According to the method, the added load-type activated carbon can effectively catalyze the quinclorac to degrade the quinclorac at the room temperature, can be recycled and reused after the reaction, is wide in pH application range, is high in treating efficiency and simple in operation at the room temperature, and has great application prospects in the aspects of degrading the quinclorac organic pollutant.

Description

technical field [0001] The invention relates to the technical field of pesticide degradation, in particular to a method for degrading quinclorac organic pollutants by catalyzing persulfate based on loaded activated carbon. Background technique [0002] Quinclorac is a growth hormone herbicide, mainly used to control monocotyledonous weeds in paddy fields, especially barnyardgrass, and is one of the main herbicides used in rice fields before and after emergence in my country. However, due to the use of the herbicide quinclorac in the previous cropping paddy fields, its residue in the soil will cause abnormal plant growth in subsequent crops (such as flue-cured tobacco, cucumber, broad bean, etc.), seriously affecting the yield and quality of crops. At present, the main ways to reduce quinclorac pollution in the environment are photodegradation and microbial degradation. According to reports, MariaVittoriaPinna et al. (Chemosphere, 2012, 86(6):655-658) simulated sunlight phot...

Claims

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Application Information

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IPC IPC(8): C02F1/72B01J27/24C02F101/36
CPCY02W10/37
Inventor 钟美娥龚道新李季
Owner HUNAN AGRICULTURAL UNIV
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