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Method for removing organic pollutant in water

A technology for removing organic pollutants and water, applied in the field of water treatment, can solve the problems of low removal efficiency of organic pollutants, slow free radical generation, narrow pH trial range, etc., and achieves low one-time investment cost and simple and easy operation. , a wide range of effects

Inactive Publication Date: 2018-03-30
汤镕嘉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the transition metals used to activate persulfate are mainly divalent cobalt ions and ferrous ions, and the Fenton-like reaction between divalent cobalt ions and monosulfate is used to generate highly active species when treating organic pollutants in water. , although it has the advantages of fast degradation rate and wide trial pH range, divalent cobalt ion itself, as a metal with strong toxicity, is easy to form secondary pollution and is not suitable for water treatment; Iron ions activate persulfate, which has the disadvantages of slow free radical generation, low removal efficiency of organic pollutants, narrow pH test range, and easy formation of red mud to cause secondary pollution.

Method used

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  • Method for removing organic pollutant in water

Examples

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Effect test

Embodiment 1

[0022] Use hydrochloric acid to adjust the initial pH value of the water body to be treated whose organic pollutant is trichlorethylene to 7, then add hydroxylamine hydrochloride, potassium persulfate, sodium percarbonate and copper sulfate in order in the water body to be treated, The molar concentration ratio of trichlorethylene, hydroxylamine hydrochloride, potassium persulfate, sodium percarbonate and copper sulfate is 1: 25: 25: 25: 0.5; the final water temperature is 25 ℃ of conditions, stirring reaction 15min, and in 0.5, 1 , 3, 5, 7, 10, and 15 minutes, measure the remaining amount of trichlorethylene.

Embodiment 2

[0029] Use perchloric acid to adjust the initial pH value of the water to be treated with the organic pollutant dye methyl orange to 6, and then add hydroxylamine hydrochloride, sodium persulfate, potassium percarbonate and copper perchlorate in sequence to the water to be treated , the molar concentration ratio of the dyestuff methyl orange, hydroxylamine hydrochloride, sodium persulfate, potassium percarbonate and copper perchlorate in the water body to be treated is 1: 400: 500: 100: 10; the final water temperature is under the condition of 40 ℃, stirring The reaction was carried out for 10 minutes. After the reaction, the remaining amount of the dye methyl orange in the system was measured, and the remaining amount of the dye methyl orange was measured to be 15%.

Embodiment 3

[0031] Use sodium hydroxide to adjust the initial pH value of the water body to be treated with dichlorophenol as the organic pollutant to 9, then add hydroxylamine hydrochloride, ammonium persulfate, ammonium percarbonate and copper nitrate to the water body to be treated in sequence, and the water body to be treated The molar concentration ratio of trichlorethylene, hydroxylamine hydrochloride, ammonium persulfate, ammonium percarbonate and copper nitrate in the water body is 1:10:100:10:5; the final water temperature is 40°C, stirring and reacting for 30 minutes, and according to the time , measuring the remaining amount of dichlorophenol in the system, the measured remaining amount of dichlorophenol is 17%.

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Abstract

The invention discloses a method for removing an organic pollutant in water. The method comprises the following steps: 1) regulating the pH (potential of Hydrogen) of a to-be-treated water body to 3 to 9 by using a pH regulator; 2) adding hydroxylamine, peroxymonosulfate (PMS), percarbonate and a bivalent copper ion into the treated water body in the step 1), and carrying out an agitation reactionat a set temperature, so that the treatment of the organic pollutant in the water is completed after the reaction is completed. According to the method, Cu<2+> is reduced to be Cu<+> by using the hydroxylamine; next, the Cu<+> is oxidized to be Cu<3+> by utilizing the PMS and the percarbonate; the generated Cu<3+>, compared with a sulfate-radical free group and a hydroxyl-group free group which are generated by the activation of the PMS, is higher in catalytic degradation activity and therefore, is quicker in the degradation speed of the organic pollutant; secondly, the Cu<2+>, the Cu<+> andthe Cu<3+> are in a cyclic process in a sewage treatment process; therefore, a small amount of the Cu<2+> only needs to be added, so that the degradation reaction of the organic pollutant can be guaranteed to be carried out and the secondary pollution is difficultly caused.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method for removing organic pollutants in water. Background technique [0002] In recent years, with the continuous improvement of my country's economic level, domestic development has been very rapid. However, the organic pollution in my country's water environment is also relatively serious. Among them, surface rivers, lakes, groundwater bodies and soil are seriously polluted by organic matter. Therefore, a high-efficiency , Convenient new methods are particularly important. At present, the common remediation methods for surface water, groundwater and soil organic pollution include the main physical adsorption method, chemical oxidation method, biodegradation method, chemical precipitation method and advanced oxidation technology. Among them, advanced oxidation technology has received extensive attention in recent years, because it can generate highly oxid...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F101/36C02F101/34
CPCC02F1/725C02F2101/308C02F2101/345C02F2101/36
Inventor 汤镕嘉刘国洪
Owner 汤镕嘉
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