Polymer hydrogel, preparation method and application thereof to water treatment
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A hydrogel and polymer technology, which is applied in water/sewage treatment, adsorbed water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of decreasing the purity and function of polymer materials, and achieve the service life. Long, easy to handle, simple to prepare results
Inactive Publication Date: 2011-09-28
NANJING UNIV
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However, most of the above methods are chemical polymerization, and the preparation process often requires the
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Embodiment 1
[0028] Monomer solution ratio: the molar ratio of NVI to HEA is 2:5, and the ratio of water to the total volume of NVI and HEA is 7:3;
[0029] Radiation polymerization process: at -78 ℃ temperature, using 60 Co-γ high-energy ray, control the radiation dose in the range of 1 × 10 3 ~1×10 6 Gy, e.g. 1×10 4 Gy.
[0030] The products were analyzed by scanning electron microscopy, such as figure 1 As can be seen from the figure, the product has a better pore structure. The same result can be obtained with electron beam radiation from an electron linear accelerator.
Embodiment 2
[0032] Monomer solution ratio: the molar ratio of NVI to HEA is 2:3, and the ratio of water to the total volume of NVI and HEA is 5:2;
[0033] Radiation polymerization process: at -78 ℃ temperature, using 137 Cs-γ high-energy ray, control the radiation dose in the range of 1 × 10 3 ~1×10 6 Gy, e.g. 1×10 5 Gy.
[0034] Polymer hydrogel dried product on Pb 2+ , Cr 3+ , Cd 2+ , Cu 2+ The adsorption capacities of the four metal ions are: 204 mg / g, 125 mg / g, 135 mg / g, and 105 mg / g, respectively.
Embodiment 3
[0036] Monomer solution ratio: the molar ratio of NVI to HEA is 1:9, and the ratio of water to the total volume of NVI and HEA is 7:3;
[0037] Radiation polymerization process: at -95°C, using 60 Co-γ high-energy ray, control the radiation dose in the range of 1 × 10 3 ~1×10 6 Gy, e.g. 1×10 6 Gy.
[0038] Polymer hydrogel dried product on Pb 2+ , Cr 3+ , Cd 2+ , Cu 2+ The adsorption capacities of the four metal ions are: 145 mg / g, 67 mg / g, 78 mg / g, and 83 mg / g, respectively.
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Abstract
The invention relates to polymer hydrogel and a preparation method thereof. The polymer hydrogel comprises polymerized N-vinyl imidazole and hydroxyethyl acrylate, wherein the molar ratio of the N-vinyl imidazole to the hydroxyethyl acrylate is 1:1 to 1:9. The preparation method comprises the following steps of: uniformly mixing the N-vinyl imidazole, the hydroxyethyl acrylate and water; then charging nitrogen, and polymerizing by adopting high-energy ray irradiation at the temperature of minus 63 DEG C to minus 95 DEG C to obtain the polymer hydrogel. The polymer hydrogel provided by the invention has a good pore structure, contains multiple functional groups capable of adsorbing heavy metals, has high capacity of adsorbing ions including Pb<2+>, Cr<3+>, Cd<2+> and Cu<2+>, can effectively adsorb and chelate heavy metal ions, has certain mechanical strength and long service life, and can be used for sewage treatment. In the preparation method, an initator does not need to be added so that the pureness of the polymer is ensured; and the preparation method is simple and easy to operate.
Description
technical field [0001] The invention belongs to the technical field of adsorption materials, relates to the preparation of adsorption materials and the adsorption performance of heavy metals, in particular to a polymer hydrogel, a preparation method and its application in water treatment. Background technique [0002] With the development of industry and the improvement of human living standards, the discharge of sewage increases year by year, which contains a large number of heavy metal ions that are seriously harmful to the human body. Therefore, how to effectively remove heavy metal ions has become an urgent problem to be solved. The traditional methods for treating heavy metal ions in industrial and domestic wastewater mainly include chemical treatment methods and ultrafiltration methods. Chemical treatment methods can quickly remove metal ions in wastewater. Secondary pollution, difficult reuse of wastewater and other shortcomings; ultrafiltration process is complex, hi...
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