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Method for removing organic pollutants in water by utilizing iron ions to catalyze hydroxylamine and hydrogen peroxide to react

A technology for organic pollutants and hydrogen peroxide, applied in water pollutants, chemical instruments and methods, water/sewage treatment, etc., can solve the problem of slow generation of hydroxyl radicals, slow degradation rate of organic pollutants, and one-time investment costs. High-level problems, to achieve the effect of fast free radical generation, high utilization rate and wide application range

Inactive Publication Date: 2017-05-31
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these activation methods of hydrogen peroxide have various problems to be solved in practical engineering applications. For example, activation methods such as heating, ultraviolet light, microwave and ultrasound can quickly generate hydroxyl radicals, but there are also one-time High input costs and high operating costs; when using heterogeneous catalysts to activate hydrogen peroxide to treat organic pollutants in water, there are also problems such as slow generation of hydroxyl radicals and low efficiency of organic matter degradation
Recently, it was found that hydroxylamine can also activate hydrogen peroxide to generate hydroxyl radicals, but the hydroxylamine / hydrogen peroxide reaction system also has the disadvantage of slow formation of hydroxyl radicals.
Therefore, when the hydroxylamine / hydrogen peroxide reaction system is used to remediate surface water, groundwater and soil organic pollution, there are problems of slow degradation rate and low removal efficiency of organic pollutants.

Method used

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  • Method for removing organic pollutants in water by utilizing iron ions to catalyze hydroxylamine and hydrogen peroxide to react
  • Method for removing organic pollutants in water by utilizing iron ions to catalyze hydroxylamine and hydrogen peroxide to react

Examples

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Embodiment 1

[0024] This embodiment includes the following steps:

[0025] Use perchloric acid and sodium hydroxide solution to adjust the initial pH value of the water body to be treated with 4-chlorophenol as the organic pollutant to 3, then add hydroxylamine hydrochloride, hydrogen peroxide and ferrous nitrate in order in the water body to be treated, Stir the reaction evenly at a water temperature of 20°C for 10 minutes, and the reaction is completed. Wherein, the molar concentration ratio of 4-chlorophenol, hydroxylamine hydrochloride, hydrogen peroxide and ferrous nitrate in the water body to be treated is 0.1:1:1:0.05.

[0026] In this embodiment, the curve graph of the removal effect of hydroxylamine / hydrogen peroxide system to 4-chlorophenol and the removal effect of 4-chlorophenol after adding ferrous ion is as follows figure 1 shown. Among them, ● is the removal effect curve of hydroxylamine / hydrogen peroxide system to 4-chlorophenol; ■ is the removal effect curve of 4-chlorop...

Embodiment 2

[0028] This embodiment includes the following steps:

[0029] Use perchloric acid and sodium hydroxide solution to adjust the initial pH value of the water to be treated with 4-chlorophenol as the organic pollutant to 3, then add hydroxylamine hydrochloride, hydrogen peroxide and iron nitrate to the water to be treated in sequence, The water temperature is 20°C and the reaction is evenly stirred for 10 minutes, and the method for removing the organic pollutant 4-chlorophenol in water by using iron ions to strengthen the hydroxylamine / hydrogen peroxide system is completed. Wherein, the molar concentration ratio of 4-chlorophenol, hydroxylamine hydrochloride, hydrogen peroxide and ferric nitrate in the water body to be treated is 0.1:1:1:0.05.

[0030] In this embodiment, the curve graph of the removal effect of hydroxylamine / hydrogen peroxide system to 4-chlorophenol and the removal effect of 4-chlorophenol after adding iron ions is as follows figure 2 shown. Among them, ● i...

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Abstract

The invention discloses a method for removing organic pollutants in water by utilizing iron ions to catalyze hydroxylamine and hydrogen peroxide to react. The method is characterized by comprising the following steps: (1) adjusting the pH (Potential of Hydrogen) of a water body to be treated to be 2 to 6 through utilizing a pH regulator; (2) adding the hydroxylamine, the hydrogen peroxide and ferrous ions and / or the iron ions into the water body treated by the step (1); stirring and reacting at water temperature of 0 to 35 DEG C for 10min to 60min. According to the method disclosed by the invention, extra aeration, heating, ultraviolet radiation, microwave radiation, ultrasonic cavitation and an additional electromagnetic field do not need to be carried out; only less ferrous and / or iron ions are added so that a hydroxylamine / hydrogen peroxide system is extremely promoted to generate free radicals for degrading the organic pollutants in the water.

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 by using iron ions to catalyze the reaction of hydroxylamine and hydrogen peroxide. Background technique [0002] In recent years, with the rapid development of economy and society, my country's water environment has been seriously polluted, especially the pollution of surface rivers, lakes, groundwater and soil by persistent refractory organic compounds. At present, common remediation methods for surface water, groundwater and soil organic pollution include physical adsorption, chemical reduction, biodegradation, chemical precipitation and advanced oxidation. Among them, the advanced oxidation method can quickly oxidize and degrade organic pollutants in polluted water due to the ability to generate active free radicals with a high redox potential, thereby improving the biodegradability of organic pollutants or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/30
CPCC02F1/66C02F1/722C02F1/725C02F2101/30C02F2101/345C02F2101/36C02F2305/023C02F2305/026
Inventor 邹景刘鑫蔡婳婳苑宝玲周真明
Owner HUAQIAO UNIVERSITY
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