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Treatment method of organic contaminants of methylene blue and congo red

An organic pollutant, methylene blue technology, applied in the fields of adsorption materials and photocatalytic materials, can solve problems such as poor stability, and achieve the effects of high synthesis yield, reduced energy consumption, and shortened crystallization process.

Inactive Publication Date: 2017-01-04
BOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing Anderson-type polyoxometalate-based complexes are usually prepared under conventional, reflux or solvent conditions, and their stability is relatively poor
Moreover, the existing Anderson-type polyoxometalate-based functional complex materials can simultaneously remove a variety of dye molecules under ultraviolet light irradiation and darkroom conditions. Research is very limited, especially for the catalytic degradation, adsorption, and Removed studies have not been reported

Method used

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  • Treatment method of organic contaminants of methylene blue and congo red
  • Treatment method of organic contaminants of methylene blue and congo red
  • Treatment method of organic contaminants of methylene blue and congo red

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1.1. Preparation of organic dye treatment agent (photocatalyst or adsorbent)

[0047] 0.4mmol CuCl 2 2H 2 O, 0.10mmol N,N'-bis(4-pyridinecarbonyl)-1,2-ethane, 0.15mmol Na 3 [CrMo 6 h 6 o 24 ]·8H 2 O and 8.0 mL H 2 O was sequentially added to a 25mL beaker, and stirred at room temperature for 30min to obtain a suspension mixture. After the pH of the suspension mixture was adjusted to 2.3 with 1.0mol / L HCl solution, it was transferred to a 25mL autoclave and heated at 2.5°C / h. The heating rate was increased to 110°C, and the temperature was kept for 80 hours under hydrothermal conditions. The temperature was lowered to room temperature at a cooling rate of 2.5°C / h, and a small amount of blue block crystals and the main product blue strip crystals were obtained. Alternately washed with water and ethanol for 3 times, and dried naturally at room temperature, the complex Cu 5 (μ 2 -OH) 2 (4-dpye) 2 [CrMo 6 (OH) 5 o 19 ] 2 (H 2 O) 4 (yield is 5%) and {Cu(4-Hdp...

Embodiment 2

[0051] 1.1. Preparation of organic dye treatment agent (photocatalyst or adsorbent)

[0052] 0.6mmol CuCl 2 2H 2 O, 0.10mmol N,N'-bis(4-pyridinecarbonyl)-1,2-ethane, 0.3mmolNa 3 [CrMo 6 h 6 o 24 ]·8H 2 O and 10.0 mL H 2 O was sequentially added to a 25mL beaker, and stirred at room temperature for 30min to obtain a suspension mixture. After the pH of the suspension mixture was adjusted to 2.8 with 1.0mol / L HCl solution, it was transferred to a 25mL autoclave. The heating rate was raised to 130°C, and the temperature was kept for 100 hours under hydrothermal conditions, and the temperature was lowered to room temperature at a cooling rate of 2.5°C / h to obtain a small amount of blue blocky crystals and the main product blue stripy crystals. Alternately washed with water and ethanol for 3 times, and dried naturally at room temperature, the complex Cu 5 (μ 2 -OH) 2 (4-dpye) 2 [CrMo 6 (OH) 5 o 19 ] 2 (H 2 O) 4 (yield is 9%) and {Cu(4-Hdpye)[CrMo 6 (OH) 6 o 18 ](...

Embodiment 3

[0056] 1.1. Preparation of organic dye treatment agent (photocatalyst or adsorbent)

[0057] 0.5mmol CuCl 2 2H 2 O, 0.10mmol N,N'-bis(4-pyridinecarbonyl)-1,2-ethane, 0.25mmol Na 3 [CrMo 6 h 6 o 24 ]·8H 2 O and 10.0 mL H 2O was sequentially added into a 25mL beaker, and stirred at room temperature for 30min to obtain a suspension mixture. After the pH of the suspension mixture was adjusted to 2.5 with 1.0mol / L HCl solution, it was transferred to a 25mL autoclave. The heating rate was increased to 120°C, and the temperature was kept for 96 hours under hydrothermal conditions. The temperature was lowered to room temperature at a cooling rate of 2.5°C / h, and a small amount of blue block crystals and the main product blue strip crystals were obtained. Alternately washed with water and ethanol for 3 times, and dried naturally at room temperature, the complex Cu 5 (μ 2 -OH) 2 (4-dpye) 2 [CrMo 6 (OH) 5 o 19 ] 2 (H 2 O) 4 (yield is 13%) and {Cu(4-Hdpye)[CrMo 6 (OH) 6...

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Abstract

The invention relates to a treatment method of organic contaminants of methylene blue and congo red. Copper chloride, octahydrate chromium sodium molybdate and N,N'-bis(4-picolinoyl) ethane hydrocarbon are used as raw materials; a compound of Cu5(mu2-OH)2(4-dpye)2[CrMo6(OH)5O19]2(H2O)4 synthesized by a hydrothermal synthesis method is used as a catalyst; {Cu(4-Hdpye)[CrMo6(OH)6O18](H2O)2} 2H2O is used as an adsorbent, wherein the 4-dpye is N,N'-bis(4-picolinoyl)-1,2-ethane; the method is used for treating waste water containing organic dyestuff molecules of the methylene blue and congo red. The method has the advantages that the synthesis method is simple; the yield is high; the compatibility on various water-soluble contaminants is high; the treatment effect is good; adsorbed dyestuff molecules can be subjected to desorption decomposition treatment; the repeated use can be realized; secondary pollution of the environment cannot be caused.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials and adsorption materials, in particular to a treatment method for methylene blue and Congo red organic pollutants. Background technique [0002] Organic dyes methylene blue and Congo red are commonly used dyeing agents in dye factories and printing and dyeing industries. Industrial wastewater containing such dyes has large chroma, large discharge volume, high toxicity, and poor biodegradability, which has always been a problem in wastewater treatment. Direct discharge of industrial wastewater containing methylene blue and Congo red into the natural environment will bring serious pollution to the environment on which human beings live, and endanger human health. Therefore, removing the organic dyes methylene blue and Congo red in industrial wastewater is an effective way to treat printing and dyeing wastewater and purify the environment. [0003] Currently, TiO 2 And its metal dopant as a ...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/32B01J20/22B01J20/30B01J31/22C02F101/36C02F101/38
CPCB01J20/226B01J31/2217B01J2531/0216B01J2540/40C02F1/28C02F1/32C02F2101/308C02F2101/36C02F2101/38C02F2305/10
Inventor 林宏艳曾凌王祥刘国成孙俊俊田爱香张巨文王秀丽
Owner BOHAI UNIV
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