Degradation method capable of adsorbing 2,4-dichlorophenol in organic halide

An organic halide, dichlorophenol technology, applied in chemical instruments and methods, water pollutants, oxidized water/sewage treatment, etc., can solve the problems of catalyst waste, reduce catalytic efficiency, etc., achieve reagent saving, good degradation effect, The effect of improving utilization

Inactive Publication Date: 2019-02-12
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] When the pH is higher than 3, the insoluble ferric complexes in Fenton begin to form. Since the pH value of most natural water bodies is mostly close to neutral, it will lead to waste of catalysts and reduce catalytic efficiency.

Method used

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  • Degradation method capable of adsorbing 2,4-dichlorophenol in organic halide
  • Degradation method capable of adsorbing 2,4-dichlorophenol in organic halide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take 20mL of the 1.0g / L 2,4-dichlorophenol (2,4-DCP) pollutant stock solution and place it in a 1L beaker. Pipette 10mL, 25mL, 50mL, and 100mL of the stock solution into the beaker, then add deionized water to dilute to nearly 1 liter, the concentration of Fe(Ⅲ)-EDDS complex in the mixed solution is 0.02mmol / L, 0.05mmol / L, 0.1mmol / L, 0.2mmol / L, after fully mixing, adjust the pH value to 7.0±0.1, then quickly add 100μL hydrogen peroxide solution (concentration of hydrogen peroxide solution is 30%, density 1.13g / mL) , set the volume in a 1000mL volumetric flask, and the concentration of hydrogen peroxide in the mixed solution is 1.0mmol / L; then pour it into a xenon lamp catalytic reactor, adopt internal illumination type light irradiation and adopt a xenon lamp light source, irradiate and start Timing, at 0min, 5min, 10min, 20min, 30min, 45min, 60min, 90min, 120min, take 1.0mL water sample with a pipette gun for measurement. The result is as figure 1 shown.

[0027] I...

Embodiment 2

[0029] Take 20mL of 1.0g / L 2,4-dichlorophenol (2,4-DCP) stock solution and place it in a 1L beaker. From 2.0mmol / L Fe(Ⅲ)-EDDS complex stock solution Pipette 50mL solution into a beaker, add deionized water to dilute to nearly 1 liter, the concentration of Fe(Ⅲ)-EDDS complex is 0.1mmol / L, after fully mixing, adjust the pH value to 7.0±0.1, and then rapidly Add 30 μL, 50 μL, 100 μL, and 150 μL of hydrogen peroxide solution (30% hydrogen peroxide solution, density 1.13 g / mL), set the volume in a 1000 mL volumetric flask, and the concentration of hydrogen peroxide in the mixture reaches 0.3 mmol / L, 0.5mmol / L, 1.0mmol / L, 1.5mmol / L, and then pour it into a xenon light catalytic reactor, use internal light irradiation and xenon light source, irradiate and start timing, at 0min, 5min, 10min, 20min , 30min, 45min, 60min, 90min, 120min Take 1.0mL water sample with a pipette gun for determination. The result is as figure 2 shown.

[0030] In this example, as the concentration of hydr...

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Abstract

The invention discloses a degradation method capable of adsorbing 2,4-dichlorophenol in an organic halide. The degradation method comprises the following steps: (1) putting a pollutant containing the2,4-dichlorophenol into a beaker; (2) mixing carboxylic acid and Fe(III) and adding water to prepare a carboxylic acid-Fe(III) complex compound; (3) adding the complex compound obtained in step (2) into the beaker of step (1) to enable the concentration of the 2,4-dichlorophenol in the pollutant to be 20 mg/L and the concentration of the carboxylic acid-Fe(III) complex compound to be 0.02 to 0.2 mmol/L; (4) regulating the pH (Potential of Hydrogen) value of a mixed solution of step (3) to be 7+/-0.1; then adding hydrogen peroxide and carrying out oxidization reaction; (5) finally, pouring intoa photocatalytic reactor and utilizing light irradiation to degrade the 2,4-dichlorophenol until degradation reaction is finished. The method disclosed by the invention is applied to degradation of AOX (Absorbable Organic Halide) in wastewater; carboxylic acid is introduced into traditional photo-Fenton and the disadvantages of a traditional Fenton oxidization technology that the yield of iron sludge is great and an applicable pH range is narrow can be overcome; the dosage of an oxidant hydrogen peroxide is reduced; the degradation method has good economical efficiency and a very good application prospect.

Description

technical field [0001] The invention belongs to the field of environmental protection and treatment, in particular to a method for degrading 2,4-dichlorophenol in adsorbable organic halides. Background technique [0002] Adsorbable Organic Halide (AOX) is the main pollutant in the papermaking industry. It can produce a large amount of organic chlorides in the chlorine bleaching stage of the papermaking process, which is toxic, carcinogenic, and teratogenic. It is not easy to enter the water body. It is biodegraded and easy to accumulate in organisms, causing great harm to the ecological environment and human health. It is listed as a priority pollutant by the US Environmental Protection Agency. 2,4-Dichlorophenol (2,4-DCP) is a typical chlorine-containing organic pollutant, which is highly toxic and difficult to be degraded and removed by traditional biological treatment. [0003] Advanced oxidation technologies (AOPs) have been used to treat organic and inorganic pollutant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F101/34C02F101/36
CPCC02F1/722C02F1/725C02F2101/36C02F2101/345
Inventor 黄影宋雄伟吴忆黄闻宇朱红祥王双飞
Owner GUANGXI UNIV
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