Polyvinyl alcohol anion-exchange membrane and preparation method thereof
Patent Information
- Authority / Receiving Office
- CN · China
- Current Assignee / Owner
- 江苏省盐海化工有限公司
- Publication Date
- 2013-08-21
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Abstract
Description
technical field
[0001] The invention belongs to the field of chemistry, and in particular relates to a polyvinyl alcohol anion exchange membrane. Background technique
[0002] Cr(Ⅵ) belongs to the first class of pollutants, its toxicity is 100 times that of Cr(Ⅲ), it has great harm to the human body, and long-term intake may cause cancer. Chromium will not degrade by itself under natural conditions, and has a persistent danger to the environment. Chromium mainly comes from processes such as electroplating, tanning, printing and dyeing, and chromium salt production. The state has strict restrictions on the wastewater discharge of the above-mentioned enterprises, and the Cr (Ⅵ) discharge standard must be lower than 0.5mg / L.
[0003] Cr(Ⅵ) is one of the common toxic heavy metals, especially in electroplating wastewater and leather wastewater. At present, the methods for removing Cr reported in the literature mainly include chemical adsorption, membrane interception, electroly...