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Composite scavenging agent for scavenging methyl blue and preparation method thereof

A methylene blue and purifying agent technology, applied in chemical instruments and methods, and other chemical processes, can solve the problems of complex electrode preparation, high energy consumption in electrolysis, and poor light transmittance, so as to enrich the channel structure and improve decolorization Efficiency, the effect of promoting full contact

Inactive Publication Date: 2012-09-26
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to its poor light transmittance, low biochemical activity, methylene blue is not easy to be degraded, and its metabolic intermediates are mutagenic and carcinogenic, so it has become difficult to treat industrial wastewater
The current methods for treating wastewater containing methylene blue have different limitations, such as: treating dye wastewater with flocculation will produce a large amount of sludge that is difficult to handle; photodegradation and photocatalysis require ultraviolet light; Good but high cost; biological method is low in cost but easy to produce toxic intermediate products, and the purification cycle is long, and the process parameters are not easy to control; electrolysis method has high energy consumption and complicated electrode preparation; traditional adsorption method is simple to operate but takes a long time to achieve Adsorption-desorption equilibrium

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Dissolve 0.76 mmol of yttrium nitrate in 100 mL of deionized water; disperse attapulgite with an average diameter of 18-22 nm and a length of 100-1000 nm in sodium hexametaphosphate liquid at a liquid-solid ratio of 100:1, stir at room temperature for 2 hours, and Dry at 70°C to obtain dispersed attapulgite; dissolve the dispersed attapulgite in cetyltrimethylammonium bromide solution with a mass concentration of 3g / L, stir at room temperature for 2h and dry at 70°C to obtain a surface Modified attapulgite; the cetyltrimethylammonium bromide solution and the dispersed attapulgite are configured according to a liquid-solid ratio of 100:1;

[0025] 2.92 g of the surface-modified attapulgite was slowly added to the yttrium nitrate solution, the temperature was raised to 80° C. and magnetically stirred, and the pH value was adjusted to 5 with 1.0 M nitric acid or sodium hydroxide and kept for 4 hours. Take it out, filter and wash with deionized water until no nitrate ions c...

Embodiment 2

[0028] Dissolve 8.90 mmol of yttrium nitrate in 300 mL of deionized water, disperse attapulgite with an average diameter of 18-22 nm and a length of 100-1000 nm in sodium hexametaphosphate liquid at a liquid-solid ratio of 200:1, and stir at room temperature for 1.5 h Dry at 80°C to obtain dispersed attapulgite; dissolve the dispersed attapulgite in a cetyltrimethylammonium bromide solution with a mass concentration of 5g / L, stir at room temperature for 1.5h, and then dry at 80°C. Obtain surface-modified attapulgite; the cetyltrimethylammonium bromide solution and the dispersed attapulgite are configured according to a liquid-solid ratio of 200:1;

[0029] 2.92 g of the surface-modified attapulgite was slowly added to the yttrium nitrate solution, the temperature was raised to 80° C. and magnetically stirred, and the pH was adjusted to 6 with 1.0 M nitric acid or sodium hydroxide and kept for 8 hours. Take it out, filter and wash with deionized water until no nitrate ions can ...

Embodiment 3

[0032] Dissolve 6.24mmol yttrium chloride in 200mL deionized water, disperse attapulgite with an average diameter of 18-22nm and a length of 100-1000nm in sodium hexametaphosphate liquid at a liquid-solid ratio of 400:1, and stir at room temperature for 2 hours Dry at 90°C to obtain dispersed attapulgite; dissolve the dispersed attapulgite in a cetyltrimethylammonium bromide solution with a mass concentration of 8g / L, stir at room temperature for 2h and then dry at 90°C to obtain Surface-modified attapulgite; the cetyltrimethylammonium bromide solution and the dispersed attapulgite are configured according to a liquid-solid ratio of 400:1;

[0033] 10.08 g of the surface-modified attapulgite was slowly added to the yttrium chloride solution, the temperature was raised to 80° C. and magnetically stirred, and the pH value was adjusted to 7 with 1.0 M nitric acid or sodium hydroxide and kept for 12 hours. Take it out, filter and wash with deionized water until no nitrate ions can...

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Abstract

The invention discloses a composite scavenging agent for scavenging methyl blue and a preparation method thereof, wherein the composite scavenging agent comprises attapulgite and nano yttrium oxide, wherein the nano yttrium oxide is loaded on the attapulgite, and occupies 3-15% of the attapulgite in mass. The preparation method comprises the following steps of: firstly dissolving yttrium salt in water by adopting a mixed immersing method; adding modified attapulgite powder, regulating pH as 5-8, stirring for 4-12 hours through water bath of 80 DEG C, filtering and washing by deionized water; drying overnight in a baking oven of 80 DEG C; and finally forging, thereby obtaining the composite scavenging agent. According to the invention, firstly, the attapulgite with great specific surface area and high absorption performance is combined with yttrium oxide with favorable hydration performance (a rich active center can be generated by hydration), and the preparation method has the characteristics of high methyl blue decoloration rate, rapid effectiveness, simple process and the like; and the composite scavenging agent can reach 90% maximally for cationic dye decoloration rate under the natural environment within 10 minutes.

Description

technical field [0001] The invention discloses a compound purifying agent for purifying methylene blue and a preparation method thereof; in particular, it refers to a compound purifying agent capable of efficiently purifying methylene blue in a natural environment and a preparation method thereof. The invention belongs to the technical field of inorganic purifying agent materials. Background technique [0002] Due to its poor light transmittance, low biochemical activity, methylene blue is not easy to be degraded, and its metabolic intermediates are mutagenic and carcinogenic, so it has become difficult to treat industrial wastewater. The current methods for treating wastewater containing methylene blue have different limitations, such as: treating dye wastewater with flocculation will produce a large amount of sludge that is difficult to handle; photodegradation and photocatalysis require ultraviolet light; Good but high cost; biological method is low in cost but easy to p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30
Inventor 杨华明何曦欧阳静
Owner CENT SOUTH UNIV
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