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Preparation method, product and application of rapid-subsidence organic flocculation adsorbent

An organic flocculation and adsorbent technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of unsatisfactory removal of polymeric organic matter and insufficient adsorption capacity to meet the needs , many residues and other problems, to achieve the effect of wide application range, fast floc settlement and fast settlement

Inactive Publication Date: 2019-01-08
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing flocculants used for drinking water and wastewater treatment are mainly inorganic flocculants, such as polyaluminum ferric chloride, polyferric chloride, etc. When inorganic flocculants are used alone, the flocculation effect is good, but the adsorption capacity cannot meet the demand, and the high Molecular organic matter removal effect is not ideal
However, organic flocculants have the advantages of less dosage, etc. At present, organic flocculants are all water-soluble polymer compounds, and there are disadvantages such as large flocs and many residues in water during use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 30 g of divinylbenzene into 100 mL of tetrahydrofuran and mix well, then add 60 g of 60% dimethyldiallyl ammonium chloride aqueous solution, 1.5 g of initiator azobisisobutyronitrile and stir at room temperature for more than 3 h , add the mixed solution into the hydrothermal kettle, at 100 oC Under the condition of hydrothermal reaction for 10 h, after the reaction was completed, it was cooled to room temperature, and after filtration, the precipitate was washed several times with ethanol aqueous solution to obtain an efficient and fast sedimentation organic flocculation adsorbent.

[0025] The prepared high-efficiency and fast-sedimentation organic flocculation adsorbent was used to treat the wastewater of a pesticide factory with a COD of 457 mg / L. The dosage was 100 mg / L, and the COD removal rate was 79%.

Embodiment 2

[0027] Add 40 g of divinylbenzene into 100 mL of tetrahydrofuran and mix well, then add 60 g of 60% dimethyldiallylammonium chloride aqueous solution, 1.5 g of initiator azobisisobutyronitrile and stir at room temperature for more than 3 h , add the mixed solution into the hydrothermal kettle, at 100 oC Under the condition of hydrothermal reaction for 20 h, after the reaction was completed, it was cooled to room temperature, and after filtration, the precipitate was washed several times with ethanol aqueous solution to obtain an efficient and fast sedimentation organic flocculation adsorbent.

[0028] The prepared high-efficiency and fast-sedimentation organic flocculation adsorbent is used to treat the wastewater of a pesticide factory with a COD of 457 mg / L. The dosage is 100 mg / L, and the COD removal rate is 68%.

Embodiment 3

[0030] Add 30 g of divinylbenzene to 100 mL of tetrahydrofuran and mix evenly, then add 60 g of 50% aqueous solution of sodium p-vinylbenzenesulfonate and 1.5 g of initiator azobisisobutyronitrile and stir at room temperature for more than 3 h. The solution is added to the hydrothermal kettle, at 110 oC Under the condition of hydrothermal reaction for 20 h, after the reaction was completed, it was cooled to room temperature, and after filtration, the precipitate was washed several times with ethanol aqueous solution to obtain an efficient and fast sedimentation organic flocculation adsorbent.

[0031] The prepared high-efficiency and fast-sedimentation organic flocculation adsorbent was used to treat the wastewater of a printing and dyeing factory with a COD of 379 mg / L. The dosage was 100 mg / L, and the COD removal rate was 89%.

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Abstract

The invention relates to a preparation method, a product and application of a rapid-subsidence organic flocculation adsorbent. In the method, the flocculation adsorbent is prepared by taking azodiisobutyronitrile as a polymerization initiator in a hydrous tetrahydrofuran reaction system through divinyl benzene and a water-soluble comonomer via crosslinking copolymerization. Polyelectrolyte chainsenriched on the surface of the product obtained through the method are capable of adsorbing electrifiedmacromolecular organic pollutants and colloids in flocculation water, and have certain mesoporousstructures and hydrophobicity to adsorb a part of low-molecular weight organic matters. In sewage treatment, the preparation method has the characteristics of being wide in application range, low indosage, rapid in sedimentation and the like.

Description

technical field [0001] The invention relates to a preparation method of a high-molecular organic flocculant, in particular to a preparation method of a fast-settling organic flocculant adsorbent as well as its product and application. technical background [0002] With the rapid development of my country's industrialization and the improvement of modern living standards, the content of organic matter in drainage has increased significantly, and the purification of wastewater has attracted more and more attention. Preventing water pollution has become a basic national policy of our country. Flocculants are widely used in the wastewater treatment industry to aggregate suspended particles in a solution to form coarse flocs for separation from the solution. The existing flocculants used for drinking water and wastewater treatment are mainly inorganic flocculants, such as polyaluminum ferric chloride, polyferric chloride, etc. When inorganic flocculants are used alone, the floccu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F226/02C08F212/14C08F212/36C02F1/56C02F101/30
CPCC02F1/56C02F2101/30C08F212/14C08F212/36C08F226/02
Inventor 何丹农邓洁童琴代卫国赵昆峰金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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