Decolorization treatment method for colored liquid waste

A treatment method and technology for colored waste liquid, applied in the field of catalytic decolorization of colored waste liquid, can solve the problems of difficult dispersion, membrane pollution cost, cumbersome pretreatment process, etc., and achieve low cost, high catalytic effect, and high controllability of operation. Effect

Inactive Publication Date: 2016-05-18
YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are various problems in these methods. For the adsorption method, the main problem is the poor regeneration of the adsorbent and the small adsorption capacity; the membrane separation technology has the problem of membrane fouling and high cost; the electrochemical method and advanced oxidation method mainly exist The problem of high cost; the biological method has the problems of poor stability and long reaction time
[0003] Patent CN103521192A (Taizhou University) prepared magnetic biosorbent by adding Zizania leaf powder and curing agent after Rhizopus oryzae reacted with mixed iron salt solution, but due to the limitation of the nature of the adsorbent itself, it can only be used for anionic azo dyes Adsorption, and the adsorbent itself has the problem of adsorption saturation, which will greatly limit its application
Patent CN1827535A (Sanda Membrane Technology Co., Ltd.) combines the ultrafiltration cycle and nanofiltration cycle process, and then the nanofiltration dialysate is treated by activated carbon adsorption to meet the national secondary emission standard, but this method requires cumbersome pretreatment process (Wastewater regulation, flocculation sedimentation and clarification processes), and the membrane technology itself has the problems of membrane pollution and high cost
Patent CN101863524A (Soochow University) provides a method for photocatalytic oxidative degradation of dye-containing wastewater. Platinum nanowires with a diameter of less than 3nm are used as catalysts to react under light conditions. The catalytic reaction can be completed within 20-480 minutes, but Nanomaterials do not have loading materials and are used in large amounts, and are not easy to disperse in water, causing aggregation problems, which will greatly degrade their catalytic activity
In addition, adding platinum nanowires with a diameter of less than 3nm to the dye wastewater, after catalytically degrading the dye, the platinum nanowires with a diameter of less than 3nm are difficult to recycle, which will cause secondary pollution to the water body, and also cause waste of platinum nanowire catalysts

Method used

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  • Decolorization treatment method for colored liquid waste
  • Decolorization treatment method for colored liquid waste
  • Decolorization treatment method for colored liquid waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1g of montmorillonite-loaded silver nanoparticle catalyst (containing 90% montmorillonite, 8% polydopamine and 2% silver nanoparticles) was granulated and packed into a packed column, and a mixed solution of reducing agent sodium borohydride and methylene blue (mass After the ratio of 0.1:1), the column treatment is carried out, and the required decolorization time is 10 minutes. After using more than 50 times, the decolorization rate reaches more than 95%. Use an aqueous solution containing acetone for rinsing, and the packed column recovers its decolorization ability after rinsing.

Embodiment 2-6

[0038] 1g of talcum powder-loaded platinum nanoparticle catalyst (containing 75% talc powder, 5% 3,4-dihydroxybenzylamine and 20% platinum nanoparticles) was granulated and loaded into a packed column, and the reducing agent hydrazine hydrate or After ascorbic acid or polyol or formaldehyde or a mixed solvent of formic acid and methylene blue (mass ratio 10:1), the column is processed, and the required decolorization time is 10 seconds. After more than 50 times of use, the decolorization rate reaches more than 95%. Use an aqueous solution containing 20% ​​isopropanol for rinsing. After rinsing, the packed column recovers its decolorization ability.

Embodiment 7-12

[0040] 1g of montmorillonite-supported silver nanoparticle catalyst (containing 90% montmorillonite, 8% polydopamine and 2% silver nanoparticles) is granulated and loaded into a packed column, and the reducing agent sodium borohydride and pharmaceutical or papermaking or printing and dyeing are added Or ceramic or leather or chemical mixed solvent colored wastewater (mass ratio 1:1000) is treated with solid packed bed. The required decolorization time is 1 minute. After more than 100 times of use, the decolorization rate reaches more than 95%. Ethanol-containing aqueous solution is used for rinsing, and the packed column recovers the decolorization ability after rinsing.

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PUM

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Abstract

The invention discloses a decolorization treatment method for colored liquid waste. A loaded metal catalyst and a reducing agent are adopted, colored liquid waste can be rapidly decolored, no loaded metal catalyst is consumed in the decolorization process, and continuous colored liquid waste decolorization treatment can be maintained just by adding the reducing agent. After the loaded metal catalyst is inactivated, organic solvent or water can be adopted to conduct washing to remove pollutants attached to the surface of the catalyst, the loaded metal catalyst can have activity again, and the color of the colored liquid waste is removed rapidly together with the reducing agent. The decolorization treatment method for the colored liquid waste is simple in process, all raw materials are low in price, the quantity of treated colored liquid waste is large, large-scale application is achieved easily, the loaded metal catalyst can be cycled for a long time, and decolorization treatment of colored liquid waste is greatly lowered.

Description

technical field [0001] The invention relates to a decolorization treatment method for colored waste liquid, in particular to a method for using catechol derivatives to modify a carrier skeleton material to load a metal catalyst, and then catalyzing the decolorization treatment method for colored waste liquid. Background technique [0002] Colored waste liquid is one of the key industries for industrial pollution prevention and water conservation. Colored waste liquid is mainly produced by textile printing and dyeing and other industries. Among them, the discharge of colored waste liquid in the printing and dyeing textile industry accounts for more than 80% of the industry's waste liquid discharge, which is the most influential It is a key link that restricts the development of related industries. Therefore, the treatment of colored waste liquid has become a hot spot in current research. Due to the characteristics of large water volume, high organic content, complex compositi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/70
CPCC02F1/70
Inventor 胡云霞王宁张宗仁
Owner YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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