Environment-friendly treatment method and treatment agent for industrial wastewater

A technology for industrial wastewater and environmental protection treatment, applied in water/sewage treatment, adsorbed water/sewage treatment, water/sludge/sewage treatment, etc. To achieve the effect of selective adsorption, reducing the production of secondary pollutants, and reducing the cost of recovery

Active Publication Date: 2020-07-31
深圳市广万达环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Invention patent CN109731556 discloses the application of an acrylamide-modified corn stalk / alcohol amine-modified polystyrene porous resin composite adsorbent in printing and dyeing wastewater. The acrylamide-modified corn stalk and alcohol amine-modified polystyrene porous resin Mixing and ball milling to obtain a high-efficiency treatment agent for printing and dyeing wastewater, but its decolorization effect is not ideal and it is difficult to reuse
However, the zwitterionic chloroacetylated polystyrene exchange resin has weak selective adsorption to dyes, so the adsorption capacity is not large, which reduces the adsorption efficiency.

Method used

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  • Environment-friendly treatment method and treatment agent for industrial wastewater
  • Environment-friendly treatment method and treatment agent for industrial wastewater
  • Environment-friendly treatment method and treatment agent for industrial wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] An environmental protection treatment agent for industrial wastewater is a pyridone amphoteric cross-linked polystyrene microsphere containing amino and carboxyl groups, prepared through the following steps:

[0051] S1. styrene and p-chloromethylstyrene with a molar ratio of 2.5:1 are used as polymerized monomers to prepare chloromethylated polystyrene, as follows:

[0052] Dissolve 2.70g of polyvinylpyrrolidone in 160g of ethanol, mix them well to form solution A, dissolve 0.30g of azobisisobutyronitrile in 30g of styrene, mix them well to form solution B; add solution A to a 500mL three-necked flask , under mechanical stirring, add solution B into the three-necked flask and mix evenly, blow nitrogen into the system for 15 minutes to discharge the oxygen in the system, and keep stirring and polymerizing the three-necked flask in an oil bath at 70°C;

[0053] After reacting for one hour, disperse 0.30g of azobisisobutyronitrile in 15mL of ethanol, and ultrasonically sh...

Embodiment 2-3

[0059] The environmental protection treatment agent of the industrial waste water prepared by embodiment 2-3, compared with embodiment 1, difference is that, in step S1, the mol ratio of styrene and p-chloromethyl styrene is respectively 1:1 and 4 : 1, the others are basically the same as in Embodiment 1, and will not be repeated here.

Embodiment 4-6

[0061] Embodiment 4-6 respectively provides a kind of environmental protection treatment method of industrial waste water, respectively adopts the environmental protection treatment agent of the industrial waste water prepared in embodiment 1-3, and treatment method is as follows:

[0062] (1) prepare the cationic dye and the anionic dye aqueous solution that concentration is 200mg / L respectively;

[0063] (2) 15 mg of pyridone amphoteric cross-linked polystyrene microspheres prepared in Examples 1 to 3 were added to 50 ml of the above-mentioned cationic dye and anionic dye aqueous solution, stirred at room temperature, and adsorption equilibrium was reached after 3-4 hours of adsorption, Filtration and separation to obtain pyridone amphoteric cross-linked polystyrene microspheres that adsorb dyes;

[0064] (3) Place the pyridone amphoteric cross-linked polystyrene microspheres that absorb the dye in a hydrochloric acid solution with a concentration of 0.2 mol / L, stir at room ...

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Abstract

The invention discloses an environment-friendly treatment method and a treatment agent for industrial wastewater. According to the method, pyridone amphoteric crosslinked polystyrene microspheres containing amino and carboxyl are used as an adsorbent, organic matters such as dye in the dye industrial wastewater are selectively adsorbed in the pyridone amphoteric crosslinked polystyrene microspheres, and then desorption treatment is carried out in an acid solution, so that cyclic adsorption treatment of the dye wastewater can be realized. The pyridone amphiphilic crosslinked polystyrene microsphere is prepared by the following steps: grafting chloromethylated polystyrene with a pyridone diester compound; and hydrolyzing the pyridone diester compound by NaOH to obtain a pyridone diacid compound, converting part of carboxyl into amino, and performing condensation crosslinking under the catalysis of Castros reagent to obtain the pyridone amphiphilic crosslinked polystyrene microsphere containing amino and carboxyl in a molecular chain. The pyridone amphiphilic crosslinked polystyrene microsphere has the advantages of large adsorption capacity, high adsorption efficiency, reusability and the like, and can be used for environment-friendly recovery treatment of dye waste liquid.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, and relates to an environmentally friendly treatment method and a treatment agent for industrial wastewater, in particular to an environmentally friendly treatment method for dye industrial wastewater and a pyridone amphoteric cross-linked polystyrene microsphere treatment agent. Background technique [0002] In the process of industrial production, various unreacted raw materials, intermediates, by-products, and impurities are often mixed into waste water or liquid waste. If these waste water are directly discharged into rivers, they will seriously pollute the ecological environment and endanger human health. Survival is healthy, so it must be purified. The types of wastewater discharged by different factories and enterprises are different, and the pollutant elements in them are also different, such as industrial wastewater such as machinery, chemical industry, textile, c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/30
CPCB01J20/267B01J20/28016C02F1/285C02F2101/308
Inventor 赵付平
Owner 深圳市广万达环保科技有限公司
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