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A kind of method utilizing sulfate radical to degrade chlorinated nitroaromatics

A technology of nitroaromatics and free radicals, applied in chemical instruments and methods, water pollutants, water/sludge/sewage treatment, etc., can solve problems such as cost increase, accelerated microbial reproduction, and environmental secondary pollution. Simple, safe for humans and animals, and non-polluting to the environment

Inactive Publication Date: 2018-01-23
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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  • A kind of method utilizing sulfate radical to degrade chlorinated nitroaromatics
  • A kind of method utilizing sulfate radical to degrade chlorinated nitroaromatics
  • A kind of method utilizing sulfate radical to degrade chlorinated nitroaromatics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take 500ml of water containing 30 μM 4-chloronitrobenzene (the concentration of background organic matter is 2.5mg / L, calculated as TOC), then add 2 mmol of potassium monopersulfate and 0.06 mmol of accelerator perillaldehyde ( At this moment, the concentrations of potassium monopersulfate and accelerator perillaldehyde in the solution were 4mM and 0.12mM respectively, and the molar concentration ratio was 1:0.03, and the molar concentration ratio of 4-chlorophenylnitrobenzene and accelerator was 0.25:1 ), the pH of the water body is weakly alkaline 7.4, the temperature of the water body is 21°C, then uniformly stirred and reacted for 4h, and the concentration of 4-chloronitrobenzene in the water body is measured every hour in the reaction, the result is as follows figure 1 shown.

Embodiment 2

[0029] Take 500ml of water containing 10 μM 4-chloronitrobenzene (the concentration of background organic matter is 2.5mg / L, calculated as TOC), then add 2 mmol of potassium monopersulfate and 0.06 mmol of accelerator perillaldehyde ( At this moment, the concentrations of potassium monopersulfate and accelerator perillaldehyde in the solution were 4mM and 0.12mM respectively, and the molar concentration ratio was 1:0.03, and the molar concentration ratio of 4-chlorophenylnitrobenzene and accelerator was 0.08:1 ), the pH of the water body is weakly alkaline 7.4, the temperature of the water body is 21°C, then uniformly stirred and reacted for 4h, and the concentration of 4-chloronitrobenzene in the water body is measured every hour in the reaction, the result is 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), then add 2mmol potassium monopersulfate and 0.02mmol accelerator perillaldehyde to the water body (At this moment, in the solution, the concentration of potassium monopersulfate and accelerator perillaldehyde is respectively 4mM and 0.04mM, and the molar concentration ratio is 1:0.01, 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°C, then uniformly stirred and reacted for 4h, and the concentration of 4-chloronitrobenzene in the water body is measured every hour during the reaction, the result is 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 in particular relates to a method for degrading chlorinated nitroaromatics by using sulfate radicals. Background technique [0002] Advanced oxidation technology is a purification measure that utilizes strong oxidizing active species (such as hydroxyl radicals and sulfate radicals) produced in the reaction to oxidatively decompose and mineralize organic matter and its reaction intermediates in water, and has become a major component of drinking water safety. One of the important advanced treatment technologies, especially after the toxicological analysis method is applied to the safety evaluation of drinking water. [0003] Due to the efficient removal and high selectivity of sulfate radicals for refractory organic pollutants, compared with hydroxyl radicals (redox potential 1.8-2.7eV) widely used in traditional advanced oxidation techniques, sulfate radicals have a higher Redox p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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