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Granular cationic dye adsorbent and preparation method thereof

A technology of cationic dyes and adsorbents, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc. The effect of degradability

Active Publication Date: 2015-01-14
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Aqueous solution polymerization is the most commonly used polymerization process for three-dimensional network adsorbents, but the three-dimensional network adsorbent formed by traditional aqueous solution polymerization is a colloidal product, which consumes a lot of energy in the post-drying process, and also requires post-treatment processes such as crushing and granulation , the operation is complicated

Method used

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  • Granular cationic dye adsorbent and preparation method thereof
  • Granular cationic dye adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Under stirring, 1.5g gelatin, 2.0g acrylamide, 2.0g acrylic acid, 0.05g trimethylolpropane triacrylate and 0.05g N,N' -Methylenebisacrylamide was dissolved in 50 mL of water; after each component was dissolved, 1.0 g of attapulgite was added to the mixture and dispersed evenly; 0.2 g of initiator potassium persulfate was added, and reacted at 90°C for 3 h; adjusted The pH of the mixed solution is 6-7, and after being dehydrated with industrial ethanol, it is dried at room temperature to obtain granular adsorption materials. The adsorption material has a removal rate of 75% for malachite green and an adsorption capacity of 1510 mg / g, and can selectively adsorb malachite green in a mixed solution of malachite green and orange II.

Embodiment 2

[0038] Dissolve 0.5 g of gelatin, 5.0 g of itaconic acid, 0.2 g of acrylic acid, 1.0 g of methyl methacrylate, and 0.3 g of ethylene glycol dimethacrylate in 50 mL of water while stirring; Add 2.0g montmorillonite to the mixed solution and disperse evenly; add 0.2g initiator ammonium persulfate, N,N,N'N'-Tetramethylethylenediamine 0.5g, react at 20°C for 3h; adjust the pH of the mixture to 6~7, dehydrate it with industrial ethanol, and dry it at room temperature to obtain granular adsorption materials. The adsorption material has a removal rate of 81% for malachite green and an adsorption capacity of 1625 mg / g, and can selectively adsorb malachite green in a mixed solution of malachite green and orange II.

Embodiment 3

[0040] Dissolve 2.0 g of gelatin, 4.0 g of methacrylic acid and 0.3 g of trimethylolpropane trimethacrylate in 50 mL of water under stirring; after the components are dissolved, add 1.0 g of montmorillonite and 1.0g illite and disperse evenly; add 0.5g initiator hydrogen peroxide and 0.1g thiourea, react at 30°C for 3h; adjust the pH of the mixture to 6~7, dehydrate it with industrial ethanol, and dry it at room temperature to obtain granular Adsorbent material. The adsorption material has a removal rate of 91% for malachite green and an adsorption capacity of 1839 mg / g, and can selectively adsorb malachite green in a mixed solution of malachite green and orange II.

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Abstract

The invention provides a granular cationic dye adsorbent, belonging to the technical field of high polymer materials. The adsorbent adopts gelatin as a grafting framework, uses a polymerizable functional monomer as a graft polymer chain, and adopts a clay mineral as a filler and water as a medium; the granular adsorbing material is prepared in situ under the interaction of static electricity, draining and the like of polymer chains through free radical polymerization under the existence of initiators and cross-linking agents; energy consumption in a polymerization process and an aftertreatment process is greatly reduced, and the cost of the adsorbent is effectively reduced; the adsorbing material has high-efficiency adsorbing selectivity to cationic dyes in printing and dyeing wastewater; and the gelatin and the functional monomer are non-toxic and degradable natural polymer materials, and therefore, the prepared adsorbent has good biodegradability and is green and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a cationic dye adsorption material, in particular to a granular cationic dye adsorbent and a preparation method thereof. Background technique [0002] my country is the largest country in the textile industry, and printing and dyeing is the core process of the textile industry. The wastewater discharged from printing and dyeing accounts for more than 80% of the textile industry's wastewater discharge and 35% of the entire industrial wastewater discharge. The pollution problem of the printing and dyeing industry has seriously affected the sustainable development of the textile industry and related industries. In the treatment of printing and dyeing wastewater, the adsorption method is more suitable for the advanced treatment of printing and dyeing wastewater due to its advantages of small investment, simple method, low cost, and no secondary pollution. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28
CPCB01J20/24B01J2220/4856C02F1/286C02F2103/30
Inventor 郑易安王爱勤杨效和
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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