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Three-element copolymerized hydrogel, preparation method thereof and application thereof in water treatment

A hydrogel and copolymerization technology, which is applied in water/sewage treatment, adsorbed water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as the decrease in the purity of high molecular polymers, and achieve low production cost, high preparation Simple method and high adsorption capacity

Inactive Publication Date: 2011-09-28
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, most of the above methods are chemical polymerization methods, and the preparation process often requires the addition of initiators and crosslinking agents, resulting in a decrease in the purity of the prepared polymers.

Method used

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  • Three-element copolymerized hydrogel, preparation method thereof and application thereof in water treatment
  • Three-element copolymerized hydrogel, preparation method thereof and application thereof in water treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Monomer mixture ratio: the molar ratio of HEA / AMPS / PEGD (14G) is 1:0.1:0.1, and the ratio of water to the total volume of HEA, AMPS and PEGD (14G) is 7:3;

[0027] Radiation polymerization process: directly by adding refrigerant, at -78°C temperature, using 60 Co-γ high-energy rays, the radiation dose range is controlled at 1×10 4 Gy.

[0028] The irradiated ternary copolymer hydrogel was analyzed by scanning electron microscopy, as shown in figure 1 It can be seen from the figure that the hydrogel has a good pore structure, and it can be continuously stirred for more than 2 months without being damaged under the condition of 250-500 rpm. The same result can be obtained using electron beam (MeV) radiation produced by an electron linac.

Embodiment 2

[0031] Monomer mixture ratio: the molar ratio of HEA / AMPS / PEGD (14G) is 1:0.15:0.1, and the ratio of water to the total volume of HEM, AMPS and PEGD (14G) is 7:3;

[0032] Radiation polymerization process: at a temperature of -78°C, using 137 Cs-γ high-energy rays, the radiation dose range is controlled at 1×10 5 Gy.

[0033] Cr 3+ 、Cd 2+ 、Cu 2+ , Pb 2+ The adsorption capacity of four kinds of metal ions are: 233mg / g, 198mg / g, 177mg / g, 224mg / g.

Embodiment 3

[0035] Monomer mixture ratio: the molar ratio of HEA / AMPS / PEGD (14G) is 1.5:0.2:0.3, and the ratio of water to the total volume of HEA, AMPS and PEGD (14G) is 7:2;

[0036] Radiation polymerization process: at a temperature of -95°C, using 60 Co-γ high-energy rays, the radiation dose range is controlled at 1×10 4 Gy.

[0037] Cr 3+ 、Cd 2+ 、Cu 2+ , Pb 2+ The adsorption capacity of four kinds of metal ions are respectively: 201mg / g, 188mg / g, 178mg / g, 187mg / g.

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Abstract

The invention relates to a three-element copolymerized hydrogel and a preparation method thereof. The preparation method is simple, and easy to implement; and the obtained three-element copolymerized hydrogel can effectively adsorb Cr3+, Cd2+, Cu2+ and Pb2+ ions. The preparation method for the three-element copolymerized hydrogel comprises the following step of: performing radiation polymerization on hydroxyethyl acrylate, n-ethylene dimethacrylate and 2-acrylamide-2-methylpropanesulfonic acid, wherein the molar ratio of the hydroxyethyl acrylate to the n-ethylene dimethacrylate to the 2-acrylamide-2-methylpropanesulfonic acid is (1-2):(0.1-0.6):(0.1-0.7); the n-ethylene dimethacrylate monomer is one of 2G, 4G, 9G and 14G; the radiation dosage of radiation polymerization is 1*103-1*106Gy;and the polymerization temperature is between -63 and -95DEG C. The invention has the advantages that: the three-element copolymerized hydrogel can effectively adsorb and chelate heavy metal ions; and the preparation method is simple, and easy to implement.

Description

technical field [0001] The invention relates to a ternary copolymerized hydrogel, its preparation method and its application in water treatment. Background technique [0002] With the advancement of my country's urban modernization process, the amount of urban sewage is increasing day by day, and industrial and agricultural wastewater, urban domestic sewage and various mining wastewater contain a large amount of heavy metals. For the soil, most heavy metals are relatively stable in the soil and difficult to move out of the soil, which seriously affects the physical, chemical and biological characteristics of the soil. The structure of soil microbial community changes accordingly, and the stability of soil ecological structure and function is threatened, causing pollution of crops, agricultural products and groundwater, and even endangering human health through the food chain. According to statistics, nearly 20 million hm 2 The soil is polluted by heavy metals, accounting f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/28C08F222/14C08F220/58C08F2/46C02F1/28C02F1/62B01J20/26B01J20/28B01J20/30
Inventor 李正魁周涛赵琳吴宁梅
Owner NANJING UNIV
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