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Composition for degrading dioxane in water and application of composition

A technology for dioxane and a composition is applied in the field of compositions for degrading dioxane in water, and can solve the problems of secondary environmental pollution by transition metal ions, complex preparation process of nano-carbon materials, and high pH value requirements, and achieve secondary environmental pollution. The effect of low risk of environmental pollution, low cost and simple preparation process

Inactive Publication Date: 2018-12-28
INST OF SOIL SCI CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved: the present invention aims at the defects that the metal activators in the prior art have high requirements on the pH value, the risk of secondary environmental pollution caused by transition metal ions, and the complicated and costly preparation process of nano-carbon materials is difficult to achieve a wide range of practical applications. , providing a composition for degrading dioxane in water and its application, in which the utilization rate of potassium peroxymonosulfate and the degradation rate of 1,4-D are high, and there is no secondary risk of transition metal release in the environment

Method used

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  • Composition for degrading dioxane in water and application of composition
  • Composition for degrading dioxane in water and application of composition
  • Composition for degrading dioxane in water and application of composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In this example, the steps in the method for efficiently degrading 1,4-D in water using a biochar / potassium peroxosulfate system are compared to using potassium peroxosulfate alone, biochar and biochar / potassium peroxosulfate system for 1,4-D 4-D degradation efficiency:

[0019] A uses potassium persulfate system alone:

[0020] Step 1, add water containing 1.76mg / L 1,4-D and 8.0mmol / L potassium persulfate in a 22.0mL borosilicate glass bottle with a screw cap, the initial pH is 6.5; Step 2, directly The borosilicate glass bottle was placed in a shaker with a rotation speed of 150 rpm, a temperature of 25° C., and a reaction time of 240 min.

[0021] B. Using biochar system alone:

[0022] Step 1: Weigh 20.0 mg of pine needle biochar P700 and water hyacinth hyacinth biochar E700 prepared at 700°C and place them in a 22.0 mL borosilicate glass bottle with a screw cap; Water containing 1.76mg / L 1,4-D was added to the solution, and the initial pH was 6.5. Tighten the c...

Embodiment 2

[0030] In this example, the steps in the method for efficiently degrading 1,4-D in water using a biochar / potassium persulfate system are to compare the removal rates of pollutant 1,4-D under different initial pH values:

[0031] Step 1, weigh 20.0 mg of pine needle biochar P700 and water hyacinth hyacinth biochar E700 prepared at 700 °C and place them in a 22.0 mL borosilicate glass bottle with a screw cap; step 2, add the above 22.0 mL borosilicate Add water containing 1.76mg / L 1,4-D and 8.0mmol / L potassium persulfate with pH values ​​of 3.0, 5.0, 7.0, 9.0, and 11.0 into the glass bottle; step 3, the above-mentioned borosilicate The glass bottle was placed in a vibrating bed machine with a rotation speed of 150 rpm, a temperature of 25° C., and a reaction time of 240 min.

[0032] The detection data are shown in Table 2.

[0033] Table 2 Removal rate of 1,4-D by biochar / potassium peroxymonosulfate system at different pH values

[0034]

[0035] The results in Table 2 sho...

Embodiment 3

[0037] In this example, the steps in the method for efficiently degrading 1,4-D in water by a biochar / potassium peroxysulfate system are used to compare the removal rates of 1,4-D with different dosages of potassium persulfate:

[0038]Step 1. Weigh 20.0 mg of pine needle biochar P700 and hyacinth hyacinth biochar E700 prepared at a temperature of 700°C and place them in 22.0 mL borosilicate glass bottles with screw caps; Add water containing 1.76mg / L 1,4-D and 2.0, 4.0, 8.0 and 16.0mmol / L potassium persulfate glass bottle, the initial pH is 6.5; Step 3, the above borosilicate glass The bottle was placed in a shaker with a rotation speed of 150 rpm, a temperature of 25°C, and a reaction time of 240 min.

[0039] The data in Table 3 were obtained through testing.

[0040] Table 3 The removal rate of 1,4-D with different dosages of potassium persulfate

[0041]

[0042] The results in Table 3 show that, under the condition that the dosage of the activator of the present inv...

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Abstract

The invention discloses composition for degrading dioxane in water and an application of the composition. The composition comprises biochar and potassium persulfate. A method comprises specific stepsas follows: adding biochar to water containing dioxane organic pollutants, wherein the dosage of the biochar is 1.0 g / L and the concentration of dioxane is 1.76 mg / L; adding potassium persulfate withstirring, wherein the concentration of the potassium persulfate is 2.0-16.0 mmol / L. The method has the advantages of high utilization rate of an oxidant, low cost, high degradation rate for dioxane-containing wastewater, environmental friendliness and the like.

Description

technical field [0001] The invention relates to the technical field of water pollution control, in particular to a composition for degrading dioxane in water and an application thereof. Background technique [0002] With the rapid development of industry, the problem of groundwater and surface water pollution in my country has become increasingly prominent, and organic pollutants in water seriously endanger human health and the ecological environment. Among them, dioxane (1,4-D) is often used as a stabilizer for chlorinated organic solvents, and is added to solvents such as trichloroethane (TCA) and trichloroethylene (TCE) as a dry cleaning agent, metal degreasing solvent, etc. , is widely used in industry, and enters water bodies during production and use. 1,4-D has potential carcinogenic effects, and the International Center for Cancer Research classifies it as a B2 substance. Drinking water containing 1,4-D for a long time will damage the liver, kidney and respiratory s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F101/34
CPCC02F1/72C02F2101/34
Inventor 陈梦舫欧阳达晏井春钱林波韩璐陈云
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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