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Hydrogel, its preparation method and its application in heavy metal waste water treatment

A technology of hydrogel and heavy metal ions, which is applied in the fields of adsorption water/sewage treatment, alkali metal compounds, chemical instruments and methods, etc., can solve the problems of troublesome operation, affecting adsorption performance, complex hydrogel process, etc., and achieves good results. , the preparation method is simple, the effect of easy operation

Inactive Publication Date: 2012-06-13
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, most of the preparation methods of domestic hydrogels are chemical polymerization methods, and the preparation process often requires the addition of initiators and crosslinking agents, which leads to a decrease in the purity of the prepared high molecular polymer, thereby affecting its adsorption performance.
In addition, the process of preparing hydrogels by chemical polymerization is relatively complicated and the operation is troublesome.

Method used

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  • Hydrogel, its preparation method and its application in heavy metal waste water treatment
  • Hydrogel, its preparation method and its application in heavy metal waste water treatment
  • Hydrogel, its preparation method and its application in heavy metal waste water treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Weigh a certain mass of maleamic acid (Maleamic acid) and dissolve it in deionized water, and use it as component A after fully dissolving. Then, add a certain amount of hydroxyethyl acrylate monomer (HEA for short) to the above solution, mix well, as component B; deionized water as component C, according to (A+B):C ratio of 3:7 (ml / ml) for mixing, where A:B is 1:9 (mol / mol). Ultrasonic treatment was then performed for 10 min.

[0031] 2. After nitrogen filling, at a temperature of -95°C, the radiation dose range is controlled within 1×10 3 ~1×10 6 Gy, using high-energy rays ( 60 Co-γ-ray) irradiation polymerization to form polymer hydrogels.

[0032] 3. Cut the irradiated hydrogel into small pieces of 1cm×1cm×1cm, put them in a conical flask, wash them with deionized water several times, and dry them at 45°C.

[0033] 4. Characterize the structure and composition of the product, including the analysis of functional groups on the surface of the hydrogel using F...

Embodiment 2

[0035] 1. Weigh a certain mass of maleamic acid (Maleamic acid) and dissolve it in deionized water, and use it as component A after fully dissolving. Then, add a certain amount of hydroxyethyl acrylate monomer (HEA for short) to the above solution, mix evenly, as component B; deionized water as component C, according to (A+B):C is 4:6 (ml / ml) for mixing, where A:B is 3:7 (mol / mol). Ultrasonic treatment was then performed for 10 min.

[0036] 2. After nitrogen filling, at a temperature of -78°C, the radiation dose range is controlled within 1×10 3 ~1×10 6 Gy, using high-energy rays ( 137 Cs-γ-ray) irradiation polymerization to form polymer hydrogels.

[0037] 3. Cut the irradiated hydrogel into small pieces of 1cm×1cm×1cm, put them in a conical flask, wash them with deionized water several times, and dry them at 45°C.

[0038]4. Weigh five parts of 0.1g hydrogel dried product and put them in 100ml Erlenmeyer flask respectively, then add 50ml, 1g / L Pb respectively 2+ 、Ni ...

Embodiment 3

[0040] 1. Weigh a certain mass of maleamic acid (Maleamic acid) and dissolve it in deionized water, and use it as component A after fully dissolving. Then, add a certain amount of hydroxyethyl acrylate monomer (HEA for short) to the above solution, mix well, as component B; deionized water as component C, according to (A+B):C is 2:8 (ml / ml) for mixing, where A:B is 1:1 (mol / mol). Ultrasonic treatment was then performed for 10 min.

[0041] 2. After nitrogen filling, at a temperature of -63°C, the radiation dose range is controlled within 1×10 3 ~1×10 6 Gy, using high-energy rays ( 60 Co-γ-ray) irradiation polymerization to form polymer hydrogels.

[0042] 3. Cut the irradiated hydrogel into small pieces of 1cm×1cm×1cm, put them in a conical flask, wash them with deionized water several times, and dry them at 45°C.

[0043] 4. Weigh five parts of 0.1g hydrogel dried product and put them in 100ml Erlenmeyer flask respectively, then add 50ml, 1g / L Pb respectively 2+ 、Ni 2...

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Abstract

The invention relates to a polymer hydrogel, which comprises the following components and a preparation method: 1) uniformly mixing acrylic acid, hydroxyl ethyl, maleamic acid and deionized water according to a certain proportion; wherein the volume ratio of maleamic acid and hydroxyethyl acrylate to water is 2:8 to 4:6, the mol ratio of maleamic acid to hydroxyethyl acrylate is 1:9 to 9: 1; 2) mixing and carrying out ultrasonic treatment for 7-13 minutes; 3) filling nitrogen in a mixture in the step 1) for ensuring an anoxic state; 4) using high energy ray irradiation polymerization for forming the hydrogel at the temperature of -63 to -95 DEG C. The high energy ray preferably selects Gamma ray or electron beam with energy of more than 2 MEV, the radiation dosage preferably selects 1*10<3>-1*10<6>Gy; the radiation time is 14-34 hours. The obtained polymer hydrogel possesses adsorption application on the heavy metal ions in industrial waste water, life sewage and nature water body treatment.

Description

technical field [0001] The invention belongs to the technical field of adsorbent materials, and relates to the preparation of adsorbent materials and their adsorption properties for heavy metals, in particular to the application of radiation copolymerization to prepare novel polymer hydrogels and absorb heavy metal ions. Background technique [0002] Heavy metal pollution refers to the phenomenon that due to human activities, the high content of heavy metals in the environment has a toxic effect on organisms and causes the deterioration of the quality of the ecological environment. As a class of serious environmental pollutants, heavy metals have the characteristics of concealment, irreversibility, long-term and serious consequences in the pollution process. Heavy metal pollutants come from a wide range of sources, mainly from industry, transportation, agriculture and other industries, and involve mining, metallurgy, machinery manufacturing, chemical industry, electronics an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/28C08F222/38C08F2/46B01J20/26B01J20/28C02F1/28
Inventor 李正魁吴宁梅周涛赵琳华蓉刘丹丹叶忠香
Owner NANJING UNIV
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