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Method for improving efficiency of degrading organic pollutants in water by homogeneous-phase UV-Fenton system

A technology for uv-fenton, organic pollutants

Inactive Publication Date: 2016-08-10
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, for the homogeneous UV-Fenton system, the most researched synergists at home and abroad are oxalate, malonate, citrate trisalt and ethylenediamine tetraacetate, etc., and acetate As a synergist for homogeneous UV-Fenton systems, there has been no report so far

Method used

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  • Method for improving efficiency of degrading organic pollutants in water by homogeneous-phase UV-Fenton system
  • Method for improving efficiency of degrading organic pollutants in water by homogeneous-phase UV-Fenton system

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Embodiment 1

[0013] The specific application measures are as follows. A quartz sleeve is set in the center of the photochemical reactor (or the center of the reaction pool), with a built-in ultraviolet lamp. The middle area between the quartz sleeve and the photochemical reactor (the center of the reaction pool) is the reaction degradation area. The lower part of the area is provided with a stirring device. The initial pH value is 3.0, the water temperature is 30°C, and a 6W-30W ultraviolet lamp (254 nm) is placed in the quartz sleeve in the center of the reactor / pool as a light source. Add ferric sulfate and hydrogen peroxide to the reaction zone to build a homogeneous UV-Fenton system, add different concentrations of sodium acetate as a synergist, the concentration range of sodium acetate can be adjusted according to the actual situation (the molar ratio of acetate to iron ion is 1:8 to 16 :8), the specific ratio depends on the actual situation.

Embodiment 2

[0023] A quartz sleeve is set in the center of the cylindrical photochemical reactor, with a built-in ultraviolet lamp, magnetic stirring is set below, and the middle layer is the reaction degradation zone. In this experiment, the iron ion concentration was set to 0.1 mmol / L, the concentration of azo dye Golden Orange II was 0.2 mmol / L, and the concentration of hydrogen peroxide was 10 mmol / L. A basic homogeneous UV-Fenton was constructed with a 6W UV lamp as the light source. system. The concentration of synergist sodium acetate, ammonium acetate and potassium acetate is 0.1 mmol / L. In the three synergistic homogeneous UV-Fenton systems, the degradation rate constants of the dye Golden Orange II are 0.561min respectively -1 、0.503min -1 and 0.494min -1 , are higher than the rate constant (0.424min -1 ). It shows that different acetates can enhance the degradation ability of the homogeneous UV-Fenton system, and sodium acetate is the best synergist for the homogeneous UV-...

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Abstract

The invention discloses a method for improving efficiency of degrading organic pollutants in water by a homogeneous-phase UV-Fenton system .The method includes the steps that novel regulating and control reagent acetate is added into the homogeneous-phase UV-Fenton system, photolysis generation speed of ferrous ions in the system can be adjusted to the optimal value by selecting the concentration ratio of acetate moiety to ferric ions in a solution system, and therefore the efficiency of degrading organic pollutants by the system is improved .By adopting the method, the efficiency of treating organic wastewater by the homogeneous-phase UV-Fenton system can be effectively improved, treatment time is shortened, and treatment cost is reduced.

Description

technical field [0001] The invention relates to a method for improving the efficiency of degrading organic pollutants in water by using a homogeneous UV-Fenton system. The method is used for efficiently treating organic wastewater and belongs to the technical field of wastewater treatment. Background technique [0002] The treatment of refractory organic wastewater has always attracted much attention. The homogeneous UV-Fenton system can generate hydroxyl radicals with strong oxidizing ability, has the advantages of high oxidative degradation efficiency and non-polluting products, and is an ideal technology for the treatment of refractory organic wastewater. [0003] In order to reduce the disposal cost of residual iron ions in the system after wastewater treatment, the homogeneous UV-Fenton technology based on low-concentration iron ions has been developed, but the efficiency of its catalytic degradation of organic pollutants needs to be improved. Many scholars at home and...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F1/32
CPCC02F1/722C02F1/32C02F2305/026
Inventor 陈建新王琳徐淑英
Owner NANCHANG UNIV
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