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Method for removing organic cationic dyes from waste water by magnetic nano adsorption material

A technology of magnetic nano and organic dyes, applied in adsorption water/sewage treatment, chemical instruments and methods, magnetic field/electric field water/sewage treatment, etc., can solve the problems of high cost, nano-pollution of adsorbents, complicated desorption and regeneration methods, etc. To achieve the effect of easy control, simple raw materials and abundant reserves

Inactive Publication Date: 2010-03-17
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

However, when these nanomaterials are used for adsorption, the adsorbents are easily mixed into the water, causing more and more attention to "nanopollution", and the desorption and regeneration methods of these nanoadsorbent materials are complicated and expensive.

Method used

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  • Method for removing organic cationic dyes from waste water by magnetic nano adsorption material
  • Method for removing organic cationic dyes from waste water by magnetic nano adsorption material
  • Method for removing organic cationic dyes from waste water by magnetic nano adsorption material

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Embodiment Construction

[0026] 1. Preparation of magnetic nanoadsorption materials

[0027] Dissolve 1kg humic acid and 1kg sodium hydroxide in 0.1m 3 In water, use nitrogen to completely replace the oxygen in the reactor to achieve anaerobic environment, heat the solution to 100°C under stirring conditions, and reflux; prepare a mixed solution of ferric chloride and ferrous sulfate in a molar ratio of 2:1, wherein chlorine The concentration of ferric oxide is 0.8mol / L, and the solution is added to the solution containing humic acid at a volume ratio of 1:12, continue to stir and heat to reflux for 2-2.5h, and then drop to room temperature; Carry out solid-liquid separation, wherein the obtained solid components are washed several times with deionized water until neutral, dried and ground into powder to obtain magnetic nano-adsorption materials. The prepared magnetic nano-adsorbent uses humic acid as the adsorption active ingredient, and the magnetic Fe 3 o 4 Nanoparticles are used as immobilized ...

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Abstract

The invention relates to preparation of a magnetic nano adsorbent and a method for removing organic cationic dyes from waste water by the same, and belongs to the technical field of wastewater treatment. The magnetic nano adsorbent uses Fe3O4 particles as a carrier, and coated humic acid as an active adsorbing component. The method comprises the following steps: adding mixed solution of ferric chloride and ferrous sulfate to alkaline humic acid solution, reacting under anaerobic, heating and stirring conditions, and obtaining the magnetic nano adsorbent after magnetic separation, washing, drying and grinding. The removal rate of methylene blue and neutral red reaches more than 95% by treating organic cationic dye wastewater with the magnetic nano adsorbent. The magnetic nano adsorbent after magnetic solid-liquid separation is regenerated by methanol-acetic acid solution, a desorption solvent recovers methanol and acetic acid by distillation for recycling use. The magnetic nano adsorbent has the advantages of nanoscale size, high active surface radicals, extremely high adsorption removal rate for cationic dyes, simple process, high efficiency and easy control.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, adopts magnetic nanoparticles as immobilized carriers, and natural organic humic acid as an adsorption active component to absorb cationic organic dyes in waste water. It is suitable for treating textile printing and dyeing wastewater containing cationic organic dyes, etc. Background technique [0002] my country is the largest country in textile printing and dyeing. According to the survey, the total amount of industrial wastewater discharged by my country's dye industry in 2007 reached 157 million tons. Among them, cationic dyes are an important class of chemical raw materials, mainly used in the printing and dyeing of acrylic fibers and their blended fabrics, and can also be used in the dyeing of modified polyester and acrylic fibers and the printing of acetate fibers, and are widely used in industrial production. With the vigorous development of the textile printing and dyeing ...

Claims

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Application Information

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IPC IPC(8): B01J20/06C02F9/12C02F1/48C02F1/28C02F1/66
Inventor 张盼月吴珍曾光明周春姣
Owner BEIJING FORESTRY UNIVERSITY
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