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Method for improving dye adsorption capacity of latex particle extract of latex wastewater

A latex particle and adsorption capacity technology, which is applied in the field of improving the adsorption capacity of latex particles extracted from water-based latex wastewater to cationic dyes, can solve the problems of difficult treatment, heavy secondary pollution, heavy industrial waste pollution, etc., and achieve effective treatment, Effect of increasing B/C value and reducing pollution load

Inactive Publication Date: 2019-04-12
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Industrial waste is more polluting and more difficult to dispose of than agricultural waste
At present, there are mainly two ways to prepare adsorbents from various wastes: chemical modification and preparation of activated carbon. However, the prepared adsorbents generally have the problem of low equilibrium adsorption capacity, and the preparation of activated carbon requires strong alkali, strong acid pretreatment or the addition of a large amount of heavy metals. salt (such as ZnCl 2 ) High temperature activation, heavy secondary pollution

Method used

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  • Method for improving dye adsorption capacity of latex particle extract of latex wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] S1: Filter the mixed latex production wastewater to remove suspended matter, then concentrate it with an ultrafiltration membrane, and the concentration factor is 10 times;

[0026] S2: Add aluminum sulfate to the concentrated solution, stir and react for 20 minutes, until an insoluble latex particle extract is formed;

[0027] S3: Press filter and dehydrate the latex particle extract to a water content of 80%, and then pulverize the extract;

[0028] S4: Adding NaHCO with a mass ratio of 1:1 to the extract (by dry weight) to the latex particle extract 3 , stir quickly to make the latex particle extract thin into a paste and dissolve NaHCO 3 , ultrasonic treatment at 60°C for 30 min;

[0029] S5: Vacuum drying at 90°C, so that part of the latex is softened, bonded and expanded to form a porous latex particle extract;

[0030] S6: The dried porous latex particle extract was placed in N 2 Heat treatment at a heating rate of 5°C / min under protection, and then rapidly r...

Embodiment 2

[0036] S1: Filter the mixed latex production wastewater to remove suspended matter, then concentrate it with an ultrafiltration membrane, and the concentration factor is 10 times;

[0037] S2: Add ferric chloride to the concentrated solution, stir and react for 20 minutes, until an insoluble latex particle extract is formed;

[0038] S3: Press filter and dehydrate the latex particle extract to a water content of 80%, and then pulverize the extract;

[0039] S4: Adding NaHCO with a mass ratio of 1: 1.5 to the extract (by dry weight) to the latex particle extract 3, stir quickly to make the latex particle extract thin into a paste and dissolve NaHCO 3 , ultrasonic treatment at 60°C for 40 min;

[0040] S5: Vacuum drying at 80°C to soften and cohere part of the latex to form a porous latex particle extract;

[0041] S6: The dried porous latex particle extract was placed in N 2 Under protection, heat treatment at a heating rate of 10°C / min, and then rapidly raise the temperatu...

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Abstract

The invention relates to a method for improving the dye adsorption capacity of a latex particle extract of latex wastewater. The method is characterized by comprising the following steps of conductingconcentrating with an ultrafiltration membrane; adding high-valence metal ions into a concentrated solution to form the insoluble latex particle extract; dehydrating and pulverizing the extract; adding NaHCO3 for mixing and conducting ultrasonic treatment for 20-40 min; conducting vacuum drying at 80-90 DEG C; conducting heat treatment under the protection of N2 and utilizing different kinds of latex particles as support for one another at different temperatures and a gas expansion effect to form a porous substance; using a dilute acid solution for dissolving out the high-valence metal ions and carbonate generated by decomposition and then conducting washing, filtering and drying to obtain a porous adsorbent, so that the adsorption capacity for cationic dyes is improved. The method can beused for decolorizing cationic dyeing residual liquid and wastewater.

Description

technical field [0001] The invention belongs to the technical field of sewage and sludge treatment in environmental protection, and particularly relates to a method for improving the adsorption capacity of latex particles extracted from aqueous latex wastewater to cationic dyes. Background technique [0002] Water-based latex emulsion is widely used in papermaking, carpet, lawn, paint and other industries as adhesives, thickeners, etc., mainly with styrene, butadiene, acrylamide, methyl methacrylate, isooctyl acrylate, Butyl ester, ethyl acrylate, acrylic acid, acrylonitrile, vinyl acetate, ethylene, etc. are used as monomers for heterogeneous emulsion polymerization. Its production wastewater mainly comes from the processes of reactor flushing and stripping. The wastewater mainly contains organic pollutants and inorganic substances such as latex polymerization products and unreacted small molecular monomers. A latex wastewater mainly produces styrene-butadiene latex, water...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/30
CPCB01J20/20C02F1/283C02F2101/308B01J2220/4875
Inventor 柳荣展于梦楠于晓石宝龙张宾潘颖位恒夏晶晶
Owner QINGDAO UNIV
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