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A method for degrading malachite green

A technology of malachite green and molar concentration, applied in chemical instruments and methods, oxidized water/sewage treatment, special compound water treatment, etc., can solve the problems of increased application cost, low utilization rate, large dosage, etc., to achieve The effect of efficient, rapid and pollution-free degradation

Active Publication Date: 2019-11-15
平邑经济开发区投资发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When using the Fenton system to treat wastewater, H 2 o 2 The phenomenon of large dosage (more than 0.1mol / L) and low utilization rate caused a lot of waste of hydrogen peroxide, greatly increased the application cost of this technology and limited its application range

Method used

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  • A method for degrading malachite green
  • A method for degrading malachite green
  • A method for degrading malachite green

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] When the concentration of malachite green is 4mg / L, different concentrations of NaNO 2 and H 2 o 2 Effect on decolorization rate:

[0025] NaNO below 2 and H 2 o 2 The concentration of is the molar concentration;

[0026] Table 1.1

[0027]

[0028] Table 1.2

[0029]

Embodiment 2

[0031] When the concentration of malachite green is different, different concentrations of NaNO 2 And the effect of hydrogen peroxide on the decolorization rate:

[0032] NaNO below 2 The concentration of hydrogen peroxide and hydrogen peroxide is molar concentration;

[0033] Table 2.1

[0034]

[0035] Table 2.2

[0036]

Embodiment 3

[0038] When the concentration of malachite green is 80mg / L, different concentrations of NaNO 2 And the effect of hydrogen peroxide on the decolorization rate:

[0039] NaNO below 2 The concentration of hydrogen peroxide and hydrogen peroxide is molar concentration;

[0040] chart 3.1

[0041]

[0042] Table 3.2

[0043]

[0044] Through the orthogonal experiment and single factor analysis experiment of malachite green wastewater, the best experimental conditions for treating the printing and dyeing wastewater were determined. in NaNO 2 and H 2 o 2 When the molar concentration is 1:1-1.5 and the reaction time is 60s, the decolorization rate can reach more than 95%. The experiment proves that peroxynitrite system can efficiently degrade MG wastewater. The above experiments prove that this system can be used as an advanced oxidation method for efficiently degrading organic wastewater, and the residual H in the system 2 o 2 It can also work synergistically with the...

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Abstract

The invention provides a method for degrading malachite green. The method comprises the following steps: a, the pH value of a malachite green solution is regulated to 0.5-2.8; b, hydrogen peroxide is added, and the mixture is well mixed; c, sodium nitrite is added for starting a reaction, wherein sodium nitrite is added fast under stirring, and a reaction time is 25-60s. The method provided by the invention is an advanced oxidation method for highly efficiently degrading organic wastewater. Residual H2O2 in the system can provide a synergistic effect with a traditional Fenton oxidation system, such that a highly efficient pollution-free degradation effect is achieved. The method is worth popularization.

Description

technical field [0001] The invention relates to wastewater treatment, in particular to the treatment of dye wastewater. Background technique [0002] Dye wastewater is one of several industrial wastewaters that are difficult to treat at present, accounting for about 1 / 10 of the total industrial wastewater discharge. With the development of dyestuff and printing and dyeing industry, its sewage discharge and the degree of pollution to water body are intensifying. [0003] Malachite green, also known as malachite green, is a blue-green crystal with metallic flashes. It is easily soluble in water and belongs to the diaminotriphenylmethane dyes. It is often represented by the symbol MG. Malachite green has side effects such as high toxin, high residue, teratogenicity, and mutagenesis; malachite green is a synthetic organic dye, which is a refractory organic substance, which will cause relatively large organic pollution to the receiving water body, causing human Unpleasant color...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72C02F101/38C02F103/30
CPCC02F1/722C02F2101/36C02F2101/38C02F2301/00C02F2305/026
Inventor 黄俊潮
Owner 平邑经济开发区投资发展有限公司