Method for preparing waste-water treating agent containing organic dye

A wastewater treatment agent and organic dye technology, applied in the direction of adsorption water/sewage treatment, ion exchange water/sewage treatment, etc., can solve the problems of cyclodextrin inclusion capacity decline, difficult separation and recovery, high cost, etc., and achieve simple preparation method Ease of operation, improved processing capacity, and the effect of less dosage

Inactive Publication Date: 2010-05-19
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to its water solubility, cyclodextrin is not easy to separate and recover after treatment. Generally, it is not directly used as a water treatment agent for organic dyes. Some studies have used cyclodextrin for water treatment after polymerization. The inclusion ability of cyclodextrin is greatly reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Add 1g of montmorillonite to 100mL of β-cyclodextrin aqueous solution, wherein the concentration of β-cyclodextrin is 2g / L, place the mixture in a 30°C water bath for stirring, the stirrer speed is 2000r / min, and the stirring time is 6h , to obtain a montmorillonite / cyclodextrin suspension, and centrifuge the suspension at a speed of 3000 r / min for 10 min. The supernatant was removed, and the precipitate was dried in an oven at a drying temperature of 80° C. for 10 hours to obtain a montmorillonite sample containing β-cyclodextrin between layers. Add 0.2 g of the obtained sample into 100 mL of wastewater containing organic dyes, stir in a water bath at 30 °C for 2 h at a speed of 1500 r / min, take the supernatant after the solution is static and stratified, measure its COD value and absorbance value, and calculate its COD removal The rate reaches 71.3%, and the chroma removal rate reaches 98.6%.

Embodiment 2

[0015] Add 1g of montmorillonite to 100mL of α-cyclodextrin aqueous solution, wherein the concentration of α-cyclodextrin is 2g / L, place the mixture in a 30°C water bath for stirring, the stirrer speed is 2000r / min, and the stirring time is 6h , to obtain a montmorillonite / cyclodextrin suspension, and centrifuge the suspension at a speed of 3000 r / min for 10 min. The supernatant was removed, and the precipitate was dried in an oven at a drying temperature of 80° C. for 10 hours to obtain a montmorillonite sample containing α-cyclodextrin between layers. Add 0.2 g of the obtained sample into 100 mL of wastewater containing organic dyes, stir in a water bath at 30 °C for 2 h at a speed of 1500 r / min, take the supernatant after the solution is static and stratified, measure its COD value and absorbance value, and calculate its COD removal The rate reaches 68.6%, and the chroma removal rate reaches 98.1%.

Embodiment 3

[0017] Add 1g of montmorillonite to 100mL of β-cyclodextrin aqueous solution, wherein the concentration of β-cyclodextrin is 2.5g / L, place the mixture in a water bath at 30°C for stirring, the stirrer speed is 2500r / min, the stirring time After 7 hours, the montmorillonite / cyclodextrin suspension was obtained, and the suspension was centrifuged at a speed of 3500 r / min for 15 minutes. The supernatant was removed, and the precipitate was dried in an oven at a drying temperature of 90° C. for 10 hours to obtain a montmorillonite sample containing β-cyclodextrin between layers. Add 0.2 g of the obtained sample into 100 mL of wastewater containing organic dyes, stir in a water bath at 35 °C for 2 h at a speed of 1500 r / min, take the supernatant after the solution is static and stratified, measure its COD value and absorbance value, and calculate its COD removal The rate reaches 72.1%, and the chroma removal rate reaches 98.9%.

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Abstract

The invention relates to a preparation method of an organic dye wastewater treatment additive applied for environment protection. The method can improve the influence of montmorillonite on the organicdye wastewater treatment and reduce the dosage of the treatment additive. The technical proposal is that the montmorillonite is joined into the cyclodextrin solution in weight radio of 4 to 8: 1; through stirring with a mixer in water bath of 20 to 40 degree centigrade at the rotational speed of 1000 to 3000r / min for 1 to 10h, the montmorillonite / cyclodextrin suspension can be prepared; then thesuspension is centrifugally separated with a centrifuge at the rotational speed of 1000 to 4000r / min for 10 to 30min, with the clean liquid excluded; finally the sediment is put into a dry oven witha temperature of 70 to 100 degree centigrade for 8 to 24h, and the montmorillonite with cyclodextrin contained in interlayer can be prepared. The invention makes use of the double process influence ofthe montmorillonite and cyclodextrin on organic dye wastewater, improves the removal ratio and decoloring radio of the treatment additive on COD, and can be broadly used for the treatment of organicdye wastewater.

Description

technical field [0001] The invention relates to a preparation method of a treatment agent for wastewater containing organic dyes. The method can improve the treatment capacity of montmorillonite for wastewater containing organic dyes and can effectively reduce the dosage of the treatment agent, which belongs to the preparation method of treatment agents in the field of environmental protection. technical background [0002] Organic dyes are a large class of chemicals with stable chemical properties and difficult to degrade. General physical and chemical treatment methods often fail to achieve the purpose of decolorizing dye-containing wastewater. The physical and chemical treatment methods reported so far mainly include radiation method, adsorption-extraction method, magnetic separation method, coagulation sedimentation method and oxidation method. Although there are many treatment methods for wastewater containing organic dyes, each of them has certain shortcomings. Multipl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28C02F1/42
Inventor 廖文菊邹长军
Owner SOUTHWEST PETROLEUM UNIV
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