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Method for removing methylene blue from dye wastewater

A methylene blue, dye wastewater technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., to achieve high process efficiency, reuse adsorption performance, and environmental friendliness.

Inactive Publication Date: 2017-01-11
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there have been no reports on the effective adsorption and removal of molybdenum oxide materials for wastewater dyes. Therefore, it is of practical value to study the controllable synthesis and regulation of molybdenum oxide materials so that they can adsorb methylene blue in wastewater with high activity.

Method used

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  • Method for removing methylene blue from dye wastewater
  • Method for removing methylene blue from dye wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] α-MoO 3 Particle preparation:

[0021] 10g of commercialized ammonium molybdate ((NH 4 ) 6 Mo 7 o 24 4H 2 O) put into an evaporating dish, place it in a muffle furnace, rise from room temperature to 500°C at 5°C / min under an air atmosphere, and keep this temperature for 4h, and finally, drop to room temperature naturally under an air atmosphere, get α-MoO 3 particle.

Embodiment 2-13

[0023] The material prepared in Example 1 was used to adsorb methylene blue in wastewater solution. Adsorption experiments were carried out in the dark to prevent the influence of light. 0.4 g of commercial α-MoO 3 and 100mL methylene blue solutions with concentrations of 10, 20, 40, 60, 80, 100, 150, 200, 300, 400, 500, 600mg / L were added to a 250mL Erlenmeyer flask, and the system was stirred and adsorbed at room temperature. Time (0.5-12h), after adsorption, the solution was centrifuged to take the upper clear night, and the absorbance was measured at the characteristic absorption wavelength of methylene blue at 664nm with a spectrophotometer Perkin ElmerLambda 750, and its composition was analyzed. The relevant results are shown in Table 1.

[0024] Table 1 α-MoO 3 Reaction result of particles adsorbing methylene blue wastewater solution

[0025]

[0026] As can be seen from Table 1: α-MoO 3 The particles can efficiently adsorb methylene blue in wastewater dyes. Wh...

Embodiment 14

[0028] The experimental procedure is the same as that in Example 7. After the adsorption is completed, separate the adsorbent from the solution, place it in a muffle furnace, and raise it from room temperature to 500°C at 5°C / min in an air atmosphere, and keep it at this temperature for 2h , finally, the air atmosphere is naturally lowered to room temperature, the adsorbed organic matter is removed, and the adsorbent α-MoO 3 Particle recovery. The experimental procedure of Example 7 was repeated, and a total of 4 repeated experiments were carried out. The adsorption experiment was repeated 4 times, and the removal rate of methylene blue in the wastewater was 100%.

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Abstract

The invention relates to a method for removing methylene blue from dye wastewater. Specifically, methylene blue in the dye wastewater can be effectively absorbed and removed through alpha-MoO3 particles under room temperature. According to the invention, alpha-MoO3 particles are prepared by taking (NH4)6Mo7O24.4H2O as precursor and baking at high temperature; the methylene blue solution with the concentration of 1-800mg / L can be absorbed; no by-product is generated; the alpha-MoO3 particles can be reused.

Description

technical field [0001] The invention relates to a method for removing methylene blue in dye wastewater, specifically through α-MoO 3 The invention provides efficient adsorption and removal of methylene blue in dye wastewater at room temperature, and belongs to the field of preparation and application of adsorbents. Background technique [0002] Methylene blue, also known as methylene blue, methylene blue, basic lake blue, is an aromatic heterocyclic compound of phenothiazine salts. Methylene blue is a cationic organic dye commonly used in industry, widely used in textiles, leather, paper, dyes, plastics and other fields. At present, a large amount of wastewater dyes are produced in the fields of papermaking, chemical industry, dyeing and weaving, etc., causing environmental pollution, the decline of photosynthetic ability of aquatic plants, human nausea, vomiting, and cancerous lesions. Therefore, with the increasing awareness of environmental protection, the treatment of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28B01J20/06B01J20/30C02F101/30
CPCB01J20/06C02F1/281C02F2303/16C02F2101/308
Inventor 李忠成马娇娇王德宝宋彩霞牟红宇
Owner QINGDAO UNIV OF SCI & TECH
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