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Method for degrading chloro-nitroaromatic by using sulfate radicals

A technology of nitroaromatics and free radicals, applied in chemical instruments and methods, water pollutants, water/sludge/sewage treatment, etc., can solve the problems of accelerated reproduction of microorganisms, cost increase, and secondary pollution of the environment, and achieve human and animal Safe, simple method, and non-polluting effect on the environment

Inactive Publication Date: 2016-06-01
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the accelerants in this technical scheme, such as ascorbic acid, hydroxylamine substances, ammonium chloride, etc., are poisonous in themselves or can cause the accelerated reproduction of microorganisms, which will cause secondary pollution to the environment when used, and the residues of the accelerants need to be treated after use. further processing, resulting in an increase in cost

Method used

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  • Method for degrading chloro-nitroaromatic by using sulfate radicals
  • Method for degrading chloro-nitroaromatic by using sulfate radicals
  • Method for degrading chloro-nitroaromatic by using sulfate radicals

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Take 500ml of water containing 30μM 4-chloronitrobenzene (the concentration of background organic matter is 2.5mg / l, calculated as TOC), and then add 2 millimoles of potassium monopersulfate and 0.06 millimoles of accelerator perillaldehyde to the water. When the concentration of potassium monopersulfate and accelerator perillaldehyde in the solution are 4mM and 0.12mM, respectively, the molar concentration ratio is 1:0.03, and the molar concentration ratio of 4-chlorophenylnitrobenzene and accelerator is 0.25:1) , The pH of the water body is weakly alkaline 7.4, the temperature of the water body is 21 ℃, and then the reaction is uniformly stirred for 4 hours, and the concentration of 4-chloronitrobenzene in the water body is measured every hour during the reaction. The results are as follows figure 1 Shown.

Embodiment 2

[0029] Take 500ml of water containing 10μM 4-chloronitrobenzene (the concentration of background organic matter is 2.5mg / l, calculated as TOC), and then add 2 millimoles of potassium monopersulfate and 0.06 millimoles of accelerator perillaldehyde to the water. When the concentration of potassium monopersulfate and the accelerator perillaldehyde in the solution are 4mM and 0.12mM, respectively, the molar concentration ratio is 1:0.03, and the molar concentration ratio of 4-chlorophenylnitrobenzene and the accelerator is 0.08:1) , The pH of the water body is weakly alkaline 7.4, the temperature of the water body is 21 ℃, and then the reaction is uniformly stirred for 4 hours, and the concentration of 4-chloronitrobenzene in the water body is measured every hour during the reaction. The results are as follows figure 1 Shown.

Embodiment 3

[0031] Take 500ml of water containing 7.5μM 4-chloronitrobenzene (the concentration of background organic matter is 2.5mg / l, calculated as TOC), and then add 2 millimoles of potassium monopersulfate and 0.02 millimoles of accelerator perillaldehyde ( At this time, the concentrations of potassium monopersulfate and the accelerator perillaldehyde in the solution were 4mM and 0.04mM, respectively, and the molar concentration ratio was 1:0.01, and the molar concentration ratio of 4-chlorophenylnitrobenzene and the accelerator was 0.25:1 ), the pH of the water body is weakly alkaline 7.4, the temperature of the water body is 21 ℃, and then the reaction is uniformly stirred for 4 hours, and the concentration of 4-chloronitrobenzene in the water body is measured every hour during the reaction. The results are as follows figure 1 Shown.

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Abstract

The invention relates to a method for degrading chloro-nitroaromatic by using sulfate radicals. Single persulfate and / or persulfate and an accelerator are added into water containing chloro-nitroaromatic for degrading; the accelerator is chosen from a group consisting of one or more of citronellal, citral, perillaldehyde, hemigossypol, acanthospermal, isodonal, gypsogenin, vanillin, cinnamyl aldehyde, magnal-dehyde, americanin A, paridifomoside, vincristine, glucurolactone, houttuynin, and helicid or phytone. The method is simple to perform, needs no additional treatment equipment, is widely applicable and has low requirement on reaction temperature; a green pollution-free natural plant extract is used as an accelerator, reducing environmental pollution.

Description

Technical field [0001] The invention belongs to the field of organic wastewater treatment, and specifically relates to a method for degrading chloronitroaromatic hydrocarbons by using sulfate radicals. Background technique [0002] Advanced oxidation technology is a purification measure that uses the strong oxidizing active species (such as hydroxyl radicals and sulfate radicals) generated in the reaction to oxidize, decompose and mineralize organic matter in water and its reaction intermediate products. It has become a guarantee for drinking water safety One of the important advanced treatment technologies, especially after toxicological analysis methods are applied to the safety evaluation of drinking water. [0003] Due to the efficient removal of difficult-to-degrade organic pollutants and high selectivity of sulfate radicals, compared with the hydroxyl radicals (redox potential 1.8~2.7v) widely used in traditional advanced oxidation technology, sulfate radicals have higher Th...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F101/36C02F101/38
CPCC02F1/72C02F2101/36C02F2101/38
Inventor 刘小为余永强孙哲王丽丽叶苗苗邵煜方磊
Owner ZHEJIANG UNIV
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