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Method for treating organic wastewater by utilizing g-C3N4 heterogeneous activated periodate

A periodate, organic wastewater technology, applied in chemical instruments and methods, chemical/physical processes, light water/sewage treatment, etc., can solve problems such as secondary pollution, achieve low cost, solve secondary pollution, high The effect of degradation efficiency

Inactive Publication Date: 2019-04-12
中核(陕西)环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of utilization g-C 3 N 4 A method for treating organic wastewater with heterogeneous activation of periodate to solve the problem of secondary pollution caused by the introduction of heavy metal modified catalysts in existing methods

Method used

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  • Method for treating organic wastewater by utilizing g-C3N4 heterogeneous activated periodate
  • Method for treating organic wastewater by utilizing g-C3N4 heterogeneous activated periodate
  • Method for treating organic wastewater by utilizing g-C3N4 heterogeneous activated periodate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: g-C under natural light conditions 3 N 4 Heterogeneous Activation of Sodium Periodate for Degradation of Organic Pollutants

[0025] Add sodium periodate to 100mL of wastewater to be treated (the wastewater contains rhodamine B, a refractory organic pollutant, and its concentration is 20 mg / L), so that the concentration is 1mmol / L, and magnetically stirred to make it fully mixed , and adjust the initial pH value of the mixture to 5.0. Then, add g-C to the above system 3 N 4 Particles, so that the concentration is 1.0g / L, and the catalytic degradation reaction is carried out at a room temperature of 20°C. Set the same conditions without adding g-C 3 N 4 The granular system was used as a control experiment.

[0026] During the reaction, 1 mL was sampled at fixed reaction time points—0, 5, 10, 20, 30, 45, and 60 min, and 0.1 mL of 2 mol / L sodium thiosulfate was added to the sample to terminate the reaction. Immediately after filtering through a 0.22 μm f...

Embodiment 2

[0028] Example 2: g-C under visible light conditions 3 N 4 Heterogeneous Activation of Sodium Periodate for Degradation of Organic Pollutants

[0029] Add sodium periodate to 100 mL of waste water to be treated (the waste water contains rhodamine B, a refractory organic pollutant, and its concentration is 20 mg / L), so that the concentration is 1 mmol / L, and magnetically stirred to make it fully mixed. Homogenize, and adjust the initial pH value of the mixture to 5.0. Then, add g-C to the above system 3 N 4 particles, so that the concentration is 1.0g / L, and at the same time turn on the 500W visible light source above the system, and carry out the catalytic degradation reaction at room temperature of 20°C. Set the same conditions without adding g-C 3 N 4 The granular system was used as a control experiment.

[0030] During the reaction, 1 mL was sampled at fixed reaction time points—0, 5, 10, 20, 30, 45, and 60 min, and 0.1 mL of 2 mol / L sodium thiosulfate was added to t...

Embodiment 3

[0032] Embodiment 3: repeatability test

[0033] Add sodium periodate to 100mL of wastewater to be treated (the wastewater contains rhodamine B, a refractory organic pollutant, and its concentration is 20 mg / L), so that the concentration is 1mmol / L, and magnetically stirred to make it fully mixed , and adjust the initial pH value of the mixture to 5.0. Then, add g-C to the above system 3 N 4 particles, so that the concentration is 1.0g / L, and at the same time turn on the 500W visible light source above the system, and carry out the catalytic degradation reaction at room temperature of 20°C.

[0034] After the reaction was carried out for 60 min, the visible light source was turned off, and 2 mL of 1000 mg / L rhodamine B and 5 mL of 20 mmol / L sodium periodate were added to the system again, and the pH of the mixture was adjusted to 5.0. Then, turn on the light source again to start the reaction, and the reaction time is still 60 min. Repeat this method 2 times.

[0035] Dur...

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Abstract

The invention provides a method for treating organic wastewater by utilizing g-C3N4 heterogeneous activated periodate, and the method comprises the step of activating the periodate by the g-C3N4 underthe illumination condition to generate strong oxidizing free radicals for mineralization degradation toxic organic pollutants in the wastewater, so that the purposes of wastewater treatment or waterbody repair are achieved. The method disclosed by the invention is simple and convenient to operate, low in cost, high in economic applicability and high in organic substance degradation efficiency, is especially suitable for wastewater containing organic dyes and can also be used for treating some biodegradable wastewater with low biodegradability. In addition, metal ions do not need to be introduced, so that the problem of secondary pollution caused by heavy metal-containing catalysts is solved.

Description

technical field [0001] The invention relates to a treatment method for highly toxic organic wastewater, in particular to a method using g-C 3 N 4 A method for treating organic wastewater with heterogeneously activated periodate. Background technique [0002] In recent years, the rapid increase of refractory organic pollutants in sewage has made the water pollution situation increasingly severe, and more and more refractory pollutants have been frequently detected in various water bodies. According to statistics, in the world, more than 2,000 kinds of organic pollutants have been detected in various water bodies, and 767 kinds of organic pollutants have been detected in drinking water. , Mutagenesis". Most of these refractory organics are difficult to be effectively removed by conventional biological processes, and they will cause serious toxicological effects and ecological hazards in the process of continuous accumulation. How to effectively remove various pollutants in...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F101/30
CPCC02F1/30B01J27/24C02F2101/308B01J35/39
Inventor 赵委托刘小波王乐力陈言李亚军
Owner 中核(陕西)环境科技有限公司
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