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Method for methylene blue dye wastewater treatment

A technology of methylene blue dye and treatment method, which is applied in the field of methylene blue dye wastewater treatment, can solve the problems of environmental pollution, complex composition, deep color of dye wastewater, etc., and achieve the effects of wide pH adaptability, good dispersibility and strong adsorption

Inactive Publication Date: 2017-11-07
DONGGUAN LIANZHOU INTPROP OPERATION MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the dyes have a complex aromatic ring structure, and have certain toxicity and bioaccumulation, and are difficult to degrade under natural conditions
Dye wastewater has deep color, complex composition, and high organic content. If it is not treated, it will bring serious pollution to the environment.
Methylene blue is a cationic dye with a wide range of applications, including the dyeing of paper, cotton, wool, silk, leather, and pulp. Although it is not highly toxic, it may cause some adverse reactions in the human body, such as increased heartbeat, vomiting, shock, and jaundice , severe cases can cause quadriplegia and tissue necrosis

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A treatment method for methylene blue dye wastewater, comprising the following steps:

[0027] (1) Mix and stir mung bean starch, glutaric anhydride, and N,N-dimethylformamide evenly, then ultrasonicate in a water bath at 50°C for 30 minutes, centrifuge after the treatment, and dry to obtain pretreated starch; among them, mung bean starch, The mass ratio of glutaric anhydride to N,N-dimethylformamide is 3:0.08:32;

[0028] (2) Mix and stir calcium chloride and deionized water until the solid is dissolved to obtain a calcium chloride solution; add pretreated starch to the calcium chloride solution, stir at 3000 rpm for 10 minutes, then add epichlorohydrin dropwise, and the dropwise addition is completed After the reaction was stirred for 10 hours, after the reaction was completed, the precipitate was left to stand, filtered, and the precipitate was washed with deionized water and absolute ethanol in turn, and dried to prepare porous starch microspheres; wherein, the conc...

Embodiment 2

[0034] A treatment method for methylene blue dye wastewater, comprising the following steps:

[0035] (1) Mix and stir mung bean starch, glutaric anhydride, and N,N-dimethylformamide evenly, then ultrasonicate in a water bath at 50°C for 30 minutes, centrifuge after the treatment, and dry to obtain pretreated starch; among them, mung bean starch, The mass ratio of glutaric anhydride to N,N-dimethylformamide is 3:0.15:32;

[0036] (2) Mix and stir calcium chloride and deionized water until the solid is dissolved to obtain a calcium chloride solution; add pretreated starch to the calcium chloride solution, stir at 3000 rpm for 10 minutes, then add epichlorohydrin dropwise, and the dropwise addition is completed Stirring and reacting for 20 hours after the reaction, after the reaction, let stand to precipitate, filter, and wash the precipitate with deionized water and absolute ethanol successively, and dry to prepare porous starch microspheres; wherein, the concentration of the c...

Embodiment 3

[0042] A treatment method for methylene blue dye wastewater, comprising the following steps:

[0043] (1) Mix and stir mung bean starch, glutaric anhydride, and N,N-dimethylformamide evenly, then ultrasonicate in a water bath at 50°C for 30 minutes, centrifuge after the treatment, and dry to obtain pretreated starch; among them, mung bean starch, The mass ratio of glutaric anhydride to N,N-dimethylformamide is 3:0.1:32;

[0044] (2) Mix and stir calcium chloride and deionized water until the solid is dissolved to obtain a calcium chloride solution; add pretreated starch to the calcium chloride solution, stir at 3000 rpm for 10 minutes, then add epichlorohydrin dropwise, and the dropwise addition is completed After the reaction was stirred for 13 hours, after the reaction was completed, the precipitate was left to stand, filtered, and the precipitate was washed with deionized water and absolute ethanol successively, and dried to prepare porous starch microspheres; wherein, the ...

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Abstract

The invention discloses a method for methylene blue dye wastewater treatment. Mung bean starch is treated by using anhydride to prepare pretreated starch; porous starch microspheres are prepared through an epoxy chloropropane cross-linking method; the surfaces of the porous starch microspheres are coated with silicon oxide through an in-situ reaction method, and the porous silicon oxide coated starch microspheres are prepared; a ferric trichloride solution and the porous silicon oxide coated starch microspheres are cross-linked under the action of a glutaraldehyde solution, and a composite adsorbent is prepared; the prepared composite adsorbent is added into methylene blue wastewater with the dye molecule concentration being 50-110 mg / L, the pH value of the wastewater is adjusted to 7-11, stirring is conducted for 30-40 minutes, then the composite adsorbent is separated, the separated wastewater meets emission standards, and the composite adsorbent absorbing methylene blue dye molecules is recycled after desorption. According to the method, the methylene blue dye molecules in the wastewater can be effectively removed, the decoloring effect is good, the adsorption capacity of the adsorbent in use is large, and no secondary pollution is caused to a water body.

Description

Technical field: [0001] The invention relates to the field of dye wastewater treatment, in particular to a treatment method for methylene blue dye wastewater. Background technique: [0002] In recent years, environmental problems caused by dye wastewater pollution have become increasingly prominent. Most of the dyes have complex aromatic ring structures, and have certain toxicity and bioaccumulation, and are difficult to degrade under natural conditions. Dye wastewater has deep color, complex composition, and high organic content. If it is not treated, it will bring serious pollution to the environment. Methylene blue is a cationic dye with a wide range of applications, including the dyeing of paper, cotton, wool, silk, leather, and pulp. Although it is not highly toxic, it may cause some adverse reactions in the human body, such as increased heartbeat, vomiting, shock, and jaundice , severe cases can cause quadriplegia and tissue necrosis. [0003] The treatment of dye w...

Claims

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Application Information

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IPC IPC(8): C02F1/28B01J20/24B01J20/28B01J20/30C02F101/30
CPCC02F1/288B01J20/24B01J20/28021B01J20/3206B01J20/3234B01J2220/4825C02F2101/308C02F2303/16
Inventor 陈东进
Owner DONGGUAN LIANZHOU INTPROP OPERATION MANAGEMENT CO LTD
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