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Preparation method of modified silica gel adsorption material for anionic dye wastewater treatment

A technology for anionic dyes and wastewater treatment, which is applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., and can solve problems such as inconvenient post-processing

Active Publication Date: 2018-06-29
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Settling silica gel before use, the purpose is to remove fine silica gel particles, so as to prevent some of the synthetic adsorption materials from being difficult to settle in sewage due to their very small volume during use, which is inconvenient for post-treatment

Method used

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  • Preparation method of modified silica gel adsorption material for anionic dye wastewater treatment
  • Preparation method of modified silica gel adsorption material for anionic dye wastewater treatment
  • Preparation method of modified silica gel adsorption material for anionic dye wastewater treatment

Examples

Experimental program
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Effect test

Embodiment

[0041] a. Add 5g of silica gel into a container filled with 225g-275g of water, mix and stir, let stand for 10-15 minutes, pour out the upper part of the turbid liquid, and dry the precipitated silica gel in an oven at a temperature of 100 ° C for 4 hours for use;

[0042] b. Add 3 g of silica gel treated in step a into the reaction vessel, add toluene as a solvent, stir for 30 minutes, then add deionized water, stir for 30 minutes, and after the silica gel is fully dispersed, add 3-aminopropyltriane Oxysilane was slowly added dropwise to the reactor, stirred at room temperature for 10-14 hours, evaporated under reduced pressure to remove the solvent, and vacuum-dried at a temperature of 70°C-90°C for 4-8 hours to obtain 3-aminopropyl triacetate in white powder form. Alkoxysilane modified silica gel;

[0043] c. Add the white powdery 3-aminopropyltrialkoxysilane-modified silica gel obtained in step b into an aqueous solution of hydrochloric acid, nitric acid or sulfuric acid w...

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Abstract

The invention relates to a preparation method for modified silicone absorption materials for treating anionic dye in waste water. The method comprises the steps of removing tiny particles in silicone through water settling; adding the treated silicone into a reaction container, adding solvent, stirring the mixture, adding deionized water and stirring the mixture to enable the silicone to fully disperse in the solvent; adding 3-aminopropyl trialkoxysilane into the reaction container dropwise slowly to be subjected to reaction at the normal temperature; performing reduced-pressure distillation to remove the solvent to obtain white powder; drying the powder under vacuum, acidizing the powder through inorganic acid, and subjecting the powder to water washing and drying to obtain the modified silicone absorption materials for anionic dye waste water treatment. 3-aminopropyl trialkoxysilane is grafted to the surface of silicone in a covalent bond mode, so that it is unnecessary to worry about the problem of leakage of organic matter. The method is mild in reaction condition, simple, reliable, high in yield, free of pollution and quite broad in application prospect. The modified silicone absorption materials for treating anionic dye in waste water, which are obtained through the method, are stable in chemical property and show outstanding absorption performance for anionic dye in waste water.

Description

technical field [0001] The invention relates to a preparation method of a modified silica gel adsorption material used for the treatment of anionic dye waste water. Since the protonated amino group is positively charged, the negatively charged anionic dye can be firmly adsorbed and recovered in aqueous solution by electrostatic force. Background technique [0002] Dye wastewater mainly comes from the production industry of dyes and dye intermediates. Due to the variety of dye production and the development of anti-photolysis, anti-oxidation and anti-biological oxidation, the treatment of dye wastewater is more difficult. Difficulties in the treatment of dye wastewater: First, the COD is high, the BOD / COD value is small, and the biodegradability is poor; the second is high chroma and complex components. The removal of COD is related to decolorization, but the problem of decolorization is more difficult. At present, the commonly used methods in industry include biodegradati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/10B01J20/32C02F1/28
CPCB01J20/103B01J20/3259C02F1/288C02F2101/308
Inventor 张亚刚张学敏王璐璐郅轲轲张乐涛周鑫王朋磊姜莹芳张岚
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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