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Method for advanced oxidation treatment of refractory organic matters in wastewater by utilizing combination of ferrous ions and dissolved oxygen to activate dithionite

A technology of dithionite and refractory organic matter, applied in the direction of oxidized water/sewage treatment, chemical instruments and methods, special compound water treatment, etc., can solve problems such as water quality deterioration, threats to life and production, and achieve easy operation, Large application potential, convenient transportation effect

Pending Publication Date: 2020-08-25
HARBIN INSTITUTE OF TECHNOLOGY SHENZHEN (INSTITUTE OF SCIENCE AND TECHNOLOGY INNOVATION HARBIN INSTITUTE OF TECHNOLOGY SHENZHEN) +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The continuous deterioration of water quality has brought a huge threat to people's life and production, and also brought great challenges to the conventional drinking water treatment process

Method used

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  • Method for advanced oxidation treatment of refractory organic matters in wastewater by utilizing combination of ferrous ions and dissolved oxygen to activate dithionite
  • Method for advanced oxidation treatment of refractory organic matters in wastewater by utilizing combination of ferrous ions and dissolved oxygen to activate dithionite
  • Method for advanced oxidation treatment of refractory organic matters in wastewater by utilizing combination of ferrous ions and dissolved oxygen to activate dithionite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Ferrous ions combined with dissolved oxygen activate dithionite system to degrade atrazine-containing organic wastewater Take four opaque reaction containers, add organic wastewater containing 1 μmol / L atrazine to each of them, and in the reactor The pH is 7.2, the reaction temperature is 30°C, the reaction atmosphere is not controlled, and the four reactors are stirred at a slow speed at the same time to make them react uniformly;

[0025] Add FeSO to reaction vessel 1 4 Solution to make its concentration 0.1mmol / L, add Na to reaction vessel 2 2 S 2 o 4 solution so that its concentration is 0.1mmol / L, in reaction vessel 3, add FeSO 4 solution and Na 2 S 2 o 4 The concentration of the solution was 0.1mmol / L and 0.1mmol / L respectively. Reactor 4 was used as a blank control. After continuing for 20 minutes, the reaction was basically completed. Afterwards, the remaining concentration of atrazine in the wastewater was detected. The detection results are sh...

Embodiment 2

[0029] Example 2: Degradation of tetrabromobisphenol A-containing organic wastewater by ferrous ions combined with dissolved oxygen to activate a dithionite system

[0030] Take four opaque reaction containers, add organic wastewater containing 2 μmol / L tetrabromobisphenol A to each of them, the pH in the reactors is 4.0, the reaction temperature is 30 ° C, and the reaction atmosphere is not controlled. Stir quickly to make it react evenly;

[0031] Add FeCl to reaction vessel 1 3 Solution to make its concentration 0.1mmol / L, add K to reaction vessel 2 2 S 2 o 4 solution so that its concentration is 0.1mmol / L, FeCl is added simultaneously in the reaction vessel 3 3 solution and K 2 S 2 o 4 The concentration of the solution is 0.1mmol / L and 0.1mmol / L respectively, and reactor 4 is used as a blank control, and the reaction continues for 45 minutes to detect the residual concentration of tetrabromobisphenol A in the waste water. The detection results are shown in the follo...

Embodiment 3

[0035] Example 3: Fe 2+ / O 2 Degradation of atrazine-containing organic wastewater with different concentrations of dithionite in the dithionite system

[0036] Take six opaque reaction containers, add organic waste water containing 1 μmol / L atrazine to each of them, the pH in the reactor is 6.9, and the reaction temperature is 30°C, and at the same time, slowly stir the six reactors to make them uniform Reaction; FeSO was added to reaction vessel 1 simultaneously 4 solution and Na 2 S 2 o 4 solution so that its concentration is 0.1mmol / L and 0.01mmol / L respectively, in reaction vessel 2, add FeSO 4 solution and Na2 S 2 o 4 Solution makes its concentration be 0.1mmol / L and 0.05mmol / L respectively, in reaction vessel 3, add FeSO 4 solution and Na 2 S 2 o 4 Solution makes its concentration all be 0.1mmol / L, adds FeSO2 simultaneously in reaction vessel 4 4 solution and Na 2 S 2 o 4 Solution makes its concentration be 0.1mmol / L and 0.2mmol / L respectively, in reactio...

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Abstract

The invention relates to a method for advanced oxidation treatment of refractory organics in wastewater by utilizing combination of ferrous ions and dissolved oxygen to activate dithionite. The methodcomprises the following steps: under the condition of normal temperature, adding ferrous salt into wastewater containing refractory organic pollutants, then adding dithionite, and conducting a reaction under the condition that a certain amount of dissolved oxygen is contained, wherein a molar ratio of the dithionite to the refractory organic pollutants in the wastewater is 50: 1 to 500: 1. The method disclosed by the invention has the characteristics of implementation at normal temperature and normal pressure, mild reaction, no external energy, environment friendliness, easiness in operationand convenience in transportation of a treatment agent, has good effect on removing refractory organic pollutants in water, and presents great application potential in the field of environmental pollution treatment.

Description

technical field [0001] The invention relates to a method for treating refractory organic pollutants in wastewater, in particular to a method for treating refractory organic pollutants in wastewater by combining ferrous ions with dissolved oxygen to activate dithionite advanced oxidation. Background technique [0002] With the growth of population and the continuous expansion of industrial scale, a large number of toxic and harmful pollutants (such as pesticides, endocrine disruptors, personal care products, drugs, etc.) have flowed into water bodies, causing serious pollution of the water environment. The continuous deterioration of water quality has brought a huge threat to people's life and production, and also brought great challenges to the conventional drinking water treatment process. The above-mentioned organic pollutants remain in the environment for a long time, are highly harmful, are difficult to treat, and have bioaccumulation. The research on the treatment techn...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F101/30
CPCC02F1/72C02F2101/30C02F2305/023
Inventor 张小磊宋伟李继付彩霞王卓悦宋祺周雨馨王可曹萌飞
Owner HARBIN INSTITUTE OF TECHNOLOGY SHENZHEN (INSTITUTE OF SCIENCE AND TECHNOLOGY INNOVATION HARBIN INSTITUTE OF TECHNOLOGY SHENZHEN)
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