Adsorption of Chromium (VI) from Water Solution onto Polymeric Membrane Systems
The toxic metals have shown a significant concentration increases in the superficial waters as a result of inappropriate residuals discharge by the municipality and industry. For chromium species can be clearly distinguished two oxidation states: Cr(VI) and Cr(III). Also, chromium s hexavalent form,...
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Veröffentlicht in: | Revista de chimie (Bucuresti) 2017-05, Vol.68 (4), p.869-872 |
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Hauptverfasser: | , , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The toxic metals have shown a significant concentration increases in the superficial waters as a result of inappropriate residuals discharge by the municipality and industry. For chromium species can be clearly distinguished two oxidation states: Cr(VI) and Cr(III). Also, chromium s hexavalent form, can be included in A group of human carcinogen for its mutagenic and carcinogenic characteristics. For Cr(VI) separation and recovering, different systems have been used, the chemical membranes being a valuable solution. In order to increase their efficacy, magnetite has been added, creating a complex system. The morphology and surface characteristics of the new systems (polysulfone (PSf) membrane in N-methyl-pyrrolidone (NMP) with magnetite) have been proved with the following types of analysis: FT-IR, Raman, SEM, OM and colorimetric determination of chromium. Magnetite incorporated in the polysulfone/NMP/Fe3O4 membrane is one new solutions used with success in retention of Cr (VI) from wastewater (85%). |
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ISSN: | 0034-7752 2668-8212 |
DOI: | 10.37358/RC.17.4.5568 |