A method of degrading trichloroethylene with hydrogen peroxide under catalysis of a growth ring in a water supply network and applications of the method in an urban water supply system

A technology of trichlorethylene and water supply pipe network, applied in chemical instruments and methods, oxidized water/sewage treatment, water/sewage treatment, etc., can solve the problems of high equipment requirements, poor safety, high cost, etc., and achieve simple equipment requirements, The effect of enhancing safety assurance, saving input and operating costs

Inactive Publication Date: 2017-06-30
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of high cost, poor safety and high requirements for equipment in the existing method for removing trichlorethylene in drinking water, and propose a method of using the growth ring in the water supply pipe network to catalyze the degradation of trichlorethylene by hydrogen peroxide. Method of vinyl chloride and its application in urban water supply system

Method used

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Effect test

specific Embodiment approach 1

[0014] Specific embodiment one: In this embodiment, the method of using the growth ring in the water supply pipe network to catalyze the degradation of trichlorethylene by hydrogen peroxide is to add the growth ring and H2O with a mass concentration of 1% to 5% in the raw water containing trichlorethylene. 2 o 2 , generate Fenton-like reagents in the process of water treatment, and react fully to remove trichlorethylene in water.

[0015] The reaction mechanism of the Fenton-like reaction described in the present embodiment is as follows:

[0016] Fe 2+ +H 2 o 2 → Fe 3+ +OH - +OH - (1)

[0017] Fe 3+ +H 2 o 2 →HO 2 - +Fe 2+ +H + (2)

[0018] Oh - +Fe 2+ → Fe 3+ +OH - (3)

[0019] Fe 3+ +HO 2 - → Fe 2+ +O 2 +H + (4)

[0020] Oh - +H 2 o 2 →H 2 O+HO 2 - (5)

[0021] It can be seen from formula (5) that divalent iron ions catalyze hydrogen peroxide to form hydroxyl radicals, and divalent iron is oxidized to ferric iron. Ferric ions react wi...

specific Embodiment approach 2

[0022] Specific embodiment two: the difference between this embodiment and specific embodiment one is that H 2 o 2 The mass concentration is 3% to 5%.

specific Embodiment approach 3

[0023] Specific embodiment three: the difference between this embodiment and specific embodiment two is that H 2 o 2 The mass concentration is 5%.

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Abstract

The invention relates to a method of degrading trichloroethylene with hydrogen peroxide under catalysis of a growth ring in a water supply network and applications of the method, particularly a method of degrading trichloroethylene with hydrogen peroxide under catalysis of a growth ring in a water supply network and applications of the method in an urban water supply system. The method is used mainly for overcoming a problem that methods at present for removing trichloroethylene from drinking water are expensive and have high requirements on equipment. According to the method, the growth ring and H2O2 are added into raw water containing the trichloroethylene, a Fenton-like reagent is generated in a water treating process and a reaction is performed to remove the trichloroethylene in the water. According to the applications, the H2O2 is added into a clear water pool of an urban water supply factory, the H2O2 in the water reacts with the growth ring in the water supply network to generate the Fenton-like reagent, and the trichloroethylene in the water is removed along with water supply circulation. The trichloroethylene removing rate of free hydroxyl radicals generated by the growth ring-Fenton-like reagent is high. The growth ring which is a waste material is utilized, only addition of the H2O2 is needed and requirements on equipment are simple.

Description

technical field [0001] The invention relates to a method for degrading trichlorethylene with hydrogen peroxide catalyzed by a growth ring in a water supply pipe network and its application in urban water supply systems. Background technique [0002] Trichlorethylene (TCE) is an important organochlorine product, which is widely used as metal degreasing agent, metal cleaning agent, metal parts processing surface treatment agent, solvent, organic extractant, fabric and wool dry cleaning agent, and can also be used in pesticide preparation , organic synthesis raw materials, pharmaceutical raw materials, etc. Due to some reasons such as improper production, use, storage or disposal, trichlorethylene (TCE) enters the atmosphere, soil, and groundwater through volatilization, leakage, waste water discharge, pesticide use, and combustion of chlorine-containing organic products and becomes a source of environmental pollution. One of the main sources. When trichlorethylene is heated ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F101/34
CPCC02F1/722C02F1/725C02F2101/345C02F2305/026
Inventor 钟丹袁一星马文成房婷婷姜晓茜袁媛王自强黄婉仪
Owner HARBIN INST OF TECH
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