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A method for rapid reduction and degradation of triphenylmethane dye crystal violet wastewater

A technology for triphenylmethane and dye wastewater, which is applied in the fields of energy wastewater treatment, general water supply conservation, chemical instruments and methods, etc., to achieve the effects of strong environmental adaptability, good degradation effect, and shortened time.

Active Publication Date: 2020-06-16
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Before the present invention, there was no report on the rapid reduction and degradation of triphenylmethane crystal violet dyes using nanometer zero-valent iron

Method used

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  • A method for rapid reduction and degradation of triphenylmethane dye crystal violet wastewater
  • A method for rapid reduction and degradation of triphenylmethane dye crystal violet wastewater
  • A method for rapid reduction and degradation of triphenylmethane dye crystal violet wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0026] After pulverizing the perilla seeds dried in the sun for 2 hours, prepare perilla seed solution at 2 g / L standard, ultrasonicate for 15 min under the condition of ultrasonic power of 50 W, and filter with medium-speed filter paper to obtain the perilla seed extract. Seed extract is mixed with 100mL concentration of 0.1mol / L soluble ferrous salt solution with the mass fraction of 2%wt, with Fe 2+ :BH 4 - Under the condition that the molar ratio is 1:2, the borohydride solution is slowly added and stirred until no bubbles are generated, and a suspension of nano-zero-valent iron (perilla seed-nano-zero-valent iron) modified on the surface of perilla seeds is obtained. At room temperature, add the perilla seed-nanometer zero-valent iron at a dose of 1 g / L to 100 mL, pH=2, and contain 250 mg / L triphenylmethane dye crystal violet wastewater, and shake to make the dye wastewater Discoloration, degradation.

[0027] In this example, perilla seed-nano zero-valent iron complet...

Embodiment 2

[0029] After the perilla seeds dried in the sun for 2 hours were pulverized, the perilla seed solution was prepared at a standard rate of 2 g / L, ultrasonicated for 15 min at an ultrasonic power of 50 W, and then filtered with a medium-speed filter paper to obtain the perilla seed extract. Seed extract is mixed with 100mL concentration of 0.1mol / L soluble ferrous salt solution with the mass fraction of 2%wt, with Fe 2+ :BH 4 -Under the condition that the molar ratio is 1:2, the borohydride solution is slowly added and stirred until no bubbles are generated, and a suspension of nano-zero-valent iron (perilla seed-nano-zero-valent iron) modified on the surface of perilla seeds is obtained. At room temperature, add the perilla seed-nanometer zero-valent iron into 100mL, pH=4, crystal violet wastewater containing 500mg / L triphenylmethane dye at a dose of 1.5g / L, and shake to make the dye Wastewater decolorization and degradation.

[0030] In this example, the perilla seed-nano z...

Embodiment 3

[0032] After the perilla seeds dried in the sun for 2 hours were pulverized, the perilla seed solution was prepared at a standard rate of 2 g / L, ultrasonicated for 15 min at an ultrasonic power of 50 W, and then filtered with a medium-speed filter paper to obtain the perilla seed extract. Seed extract is mixed with 100mL concentration of 0.1mol / L soluble ferrous salt solution with the mass fraction of 2%wt, with Fe 2+ :BH 4 - Under the condition that the molar ratio is 1:2, the borohydride solution is slowly added and stirred until no bubbles are generated, and a suspension of nano-zero-valent iron (perilla seed-nano-zero-valent iron) modified on the surface of perilla seeds is obtained. At room temperature, add the perilla seed-nanometer zero-valent iron at a dose of 0.5g / L to 100mL, pH=6, and contain 50mg / L triphenylmethane dye crystal violet wastewater, and shake to make the dye Wastewater decolorization and degradation.

[0033] In this example, perilla seed-nano zero-v...

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Abstract

The invention discloses a method for reductively degrading triphenylmethane dye crystal violet wastewater quickly and belongs to the field of nano material and dye wastewater treatment. Nano zero-valent iron (perilla seed-nano zero-valent iron) is prepared from a perilla seed extract solution as a stabilizer under a room temperature condition and can be used for reductively degrading triphenylmethane dye crystal violet quickly in a suspension state, wherein the dosage of the perilla seed-nano zero-valent iron is 0.5-2.5g / L, the pH range of the degraded dye wastewater is 2-10, the concentration range is 50-1000mg / L, the perilla seed-nano zero-valent iron at least has the decolorization ratio of 95.49% or over on 50-1000mg / L of triphenylmethane dye crystal violet within 30min and has the removal rate of 90.20% on COD of 500mg / L of triphenylmethane dye crystal violet, and the method is high in environmental adaptability, high in degradation efficiency and thorough in degradation. The method is simple and fast, and the targets of dye decolorization, degradation and removal of organic pollutants of the dye can be achieved within a short period of time.

Description

technical field [0001] The invention belongs to the technical field of rapid reduction and degradation treatment of dye wastewater, and specifically relates to the application of a nano-zero-valent iron suspension liquid synthesized greenly by using perilla seed extract to rapidly reduce and degrade dyes in wastewater. Background technique [0002] In the traditional printing and dyeing industry, dye wastewater has strong visibility and affects the transparency and sunlight transmittance of the water body. Dye wastewater has attracted much attention because of its light, thermal stability and refractory biodegradability, as well as the toxicity and carcinogenicity of degradation products. Triphenylmethane dye Crystal Violet (Crystal Violet (CV)) is a triphenylmethane dye, green with metallic luster crystal or dark green crystalline powder in solid state, is a polyphenyl ring compound, the main structure is the center Carbon atoms are attached to three benzene rings. Crysta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/70C02F101/32
CPCC02F1/705C02F2101/308C02F2101/32Y02A20/212Y02W10/37
Inventor 高景峰潘凯玲李洪禹
Owner BEIJING UNIV OF TECH
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