Functionalized polyvinyl alcohol hydrogel and preparation method thereof

A polyvinyl alcohol, functionalized technology, applied in chemical instruments and methods, inorganic chemistry, water pollutants, etc., can solve problems such as limiting industrial application and subsequent treatment of adsorbents, achieving good regeneration and reusability, and beneficial to the environment. The effect of sustainable development and simple preparation process
CN103769062AActive Publication Date: 2014-05-07广州慈康生物科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
广州慈康生物科技有限公司
Publication Date
2014-05-07

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Abstract

The invention provides novel functionalized polyvinyl alcohol hydrogel capable of adsorbing heavy metal ions and a preparation method of the novel functionalized polyvinyl alcohol hydrogel. The hydrogel comprises functionalized polyvinyl alcohol (PVA), chitosan (CS) and sodium alginate, wherein the weight ratio of the functionalized polyvinyl alcohol to the chitosan ranges from (5:95) to (95:5). The prepared hydrogel has the large adsorption capacity on heavy metal and is high in adsorption speed. The hydrogel is prepared by the following steps: functionalizing the polyvinyl alcohol and completely mixing the functionalized polyvinyl alcohol and the sodium alginate to be dissolved in water; then adding a certain amount of the chitosan and uniformly mixing; and finally, dripping mixed liquid into a calcium chloride-boric acid saturated solution to prepare hydrogel globules. The composite hydrogel provided by the invention is simple in preparation process, strong in operability and stable in performance, can be circularly utilized, has no secondary pollution and is widely applied to the field of heavy metal sewage treatment.
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Description

technical field

[0001] The invention discloses a functionalized polyvinyl alcohol hydrogel and a preparation method thereof, more specifically a functionalized polyvinyl alcohol hydrogel capable of absorbing heavy metal ions and a preparation method thereof. Background technique

[0002] my country's industrial wastewater, especially heavy metal wastewater, has a huge amount of discharge. A large amount of heavy metals in the water can not only cause cancer, teratogenicity, and mutagenesis to the human body, but also cause chronic poisoning to the human body. Heavy metals are difficult to degrade, not easy to be metabolized in the environment, and easy to be enriched and amplified by organisms. Once polluted water bodies are difficult to remove through self-purification, they not only pollute the water environment, but also greatly damage the ecosystem.

[0003] Heavy metal ions in wastewater can be recycled by precipitation, adsorption, ion exchange, membrane separation and...

Claims

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