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Deep treatment method for industrial wastewater through natural pyrite catalyzed H2O2 oxidation

An advanced treatment, H2O2 technology, applied in oxidation water/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve the problems of high cost and low utilization efficiency, and achieve easy operation, high utilization efficiency, The effect of low energy consumption

Active Publication Date: 2015-02-18
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the difficult problem of advanced treatment of industrial wastewater, and overcomes the traditional Fenton reaction requiring lower pH conditions, H 2 o 2 Utilizing the defects of low efficiency and high cost, a natural pyrite catalyzed H 2 o 2 The method of oxidation advanced treatment of industrial wastewater can achieve good implementation effects for the advanced treatment of major industrial wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of pretreatment method of pyrite, as follows:

[0031] Weigh 10g of natural pyrite in a 500mL beaker, add 300mL, 5mol / L Na 2 CO 3 The solution is soaked in minerals at room temperature for 6 hours, while soaking, place the sand core aeration head at the bottom of the beaker, and blow air into it with an air pump at a flow rate of 5L / min. After soaking, let it sit for 24 hours, discard the supernatant, and dry the minerals naturally for later use.

Embodiment 2

[0033] A kind of pretreatment method of pyrite, as follows:

[0034] Weigh 20g of natural pyrite in a 500mL beaker, add 300mL, 6mol / L Na 2 CO 3 Soak the minerals in the solution at room temperature for 10 hours, place the sand core aeration head at the bottom of the beaker while soaking, and blow air into it with an air pump at a flow rate of 4L / min. After soaking, let it sit for 20 hours, discard the supernatant, and dry the minerals naturally for later use.

Embodiment 3

[0036] A kind of pretreatment method of pyrite, as follows:

[0037] Weigh 10g of natural pyrite in a 500mL beaker, add 300mL, 3mol / L Na 2 CO 3 The solution is soaked in minerals at room temperature for 8 hours, while soaking, place the sand core aeration head at the bottom of the beaker, and blow air into it with an air pump at a flow rate of 3L / min. After soaking, let it sit for 22 hours, discard the supernatant, and dry the minerals naturally for later use.

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PUM

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Abstract

The invention relates to a deep treatment method for industrial wastewater through natural pyrite catalyzed H2O2 oxidation. The deep treatment method specifically comprises the following steps: pretreating natural pyrite, adding wastewater into a reactor, adjusting the pH value to be 8-10, adding the pretreated natural pyrite, adding nitrilotriacetic acid, fast stirring, adding a hydrogen peroxide solution, after reaction under stirring, adding a FeCl3 solution to control the mass ratio of pyrite and Fe (III) to be 10:1, adding hydrogen peroxide, continuing the reaction, and standing for precipitation, wherein residual mineral can be recycled; introducing air into supernatant separated through precipitation for secondary oxidation while keeping dissolved oxygen in the water to be above 3ppm, after sufficient aeration, adding polyacrylamide for coagulation treatment, and after standing for precipitation, discharging effluent; carrying out water quality analysis on a treated water sample to assess the treatment effect. By a simple way and various synergistic effects, the deep treatment method provided by the invention changes the generation way of Fenton reaction, significantly increases the reaction reactivity, expands the applicable pH range of the wastewater, improves the utilization efficiency of H2O2, and reduces the cost of technology, thus being an economical and efficient wastewater deep treatment technology.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to a natural pyrite catalyzed H 2 o 2 A method for advanced oxidation treatment of industrial wastewater. Background technique [0002] Refractory organic pollutants in the advanced treatment of wastewater have the characteristics of low content, non-biological degradation, and great environmental hazards. With the increasingly prominent environmental pollution problems and increasingly stringent pollutant discharge control standards, the effluent after treatment by existing process methods The COD content is generally around 150mg / L, and all of them are refractory organic matter that cannot be treated by biological methods. At present, there is a lack of effective advanced sewage treatment technology. The development of advanced sewage treatment methods with reasonable price and high treatment efficiency can well solve difficult problems. The harm of degrading organic po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/72
Inventor 吴德礼章智勇
Owner TONGJI UNIV
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