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SM ISO690:2012 SPATARU, Petru, POVAR, Igor. Influence of the interaction of calcium carbonate nanoparticles with surface-active substances on the degree of pollution of waters in small rivers. In: The Environment and the Industry: SIMI 2016 Book of abstracts, 13-14 octombrie 2016, București. București, România: National Research and Development Institute for Industrial Ecology ECOIND, 2016, Ediția a 19-a, Book of abstracts, p. 83. 10.21698/simi.2016 |
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The Environment and the Industry Ediția a 19-a, Book of abstracts, 2016 |
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Conferința "The Environment and the Industry" București, Romania, 13-14 octombrie 2016 | ||||||
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Pag. 83-83 | ||||||
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This paper presents a continuation of our research of the water pollution in |
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Cuvinte-cheie Anionic and cationic surface-active substances, calcium carbonate, Cetyltrimethylammonium, laurylsulfate, toxicity |
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<?xml version='1.0' encoding='utf-8'?> <resource xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns='http://datacite.org/schema/kernel-3' xsi:schemaLocation='http://datacite.org/schema/kernel-3 http://schema.datacite.org/meta/kernel-3/metadata.xsd'> <identifier identifierType='DOI'>10.21698/simi.2016</identifier> <creators> <creator> <creatorName>Spătaru, P.A.</creatorName> <affiliation>Institutul de Chimie al AŞM, Moldova, Republica</affiliation> </creator> <creator> <creatorName>Povar, I.G.</creatorName> <affiliation>Institutul de Chimie al AŞM, Moldova, Republica</affiliation> </creator> </creators> <titles> <title xml:lang='en'>Influence of the interaction of calcium carbonate nanoparticles with surface-active substances on the degree of pollution of waters in small rivers</title> </titles> <publisher>Instrumentul Bibliometric National</publisher> <publicationYear>2016</publicationYear> <relatedIdentifier relatedIdentifierType='ISBN' relationType='IsPartOf'></relatedIdentifier> <subjects> <subject>Anionic and cationic surface-active substances</subject> <subject>calcium carbonate</subject> <subject>Cetyltrimethylammonium</subject> <subject>laurylsulfate</subject> <subject>toxicity</subject> </subjects> <dates> <date dateType='Issued'>2016</date> </dates> <resourceType resourceTypeGeneral='Text'>Conference Paper</resourceType> <descriptions> <description xml:lang='en' descriptionType='Abstract'><p>This paper presents a continuation of our research of the water pollution in<br />Nistru and Prut Rivers with a series of surface-active substances<br />(surfactants, SASs) for small river sections with a different urban influence.<br />The influence of the interaction of CaCO3 and SAS with different chain<br />lengths and cationic and anionic hydrophilic centers has been analyzed.<br />UV VIS spectra of mixtures of laurylsulfate with cetyltrimethylammonium in<br />a ratio of 2:1 and 1:1 and separately the cationic SAS, treated by fine<br />particles of CaCO3, show significant decreasing in the amount of<br />cetyltrimethylammonium in analyzed solutions and its transfer on the<br />surface of carbonate calcium nanoparticles. Fixing laurylsulfate on the<br />surface of CaCO3 particles causes a decrease of the amount of cationic<br />SAS in analyzed solution. As a result of the cationic and anions SASs<br />interaction, a combination (or so-called complex) with a chemical<br />composition [anionic SAS * cationic SAS], electrostatically bonded, is<br />formed. UV-VIS spectra reveal the decomposition of this complex in<br />solution in the case of calcium carbonate adding. On the surface of CaCO3<br />particles, cetyltrimethylammonium can be bonded by laurylsulfate through<br />hydrophobic chains. Calcium carbonate adding changes the nature of<br />interaction of laurylsulfate with cetyltrimethylammonium along with the<br />spatial orientation of molecules on the SAS solid phase surface. This<br />phenomenon leads to increased degree of toxicity of cationic SAS in<br />aquatic environment. The obtained results have been confirmed both by<br />current published papers, as well as laboratory simulations in waters taken<br />from small rivers (Isnovat, Raut and Bac).</p></description> </descriptions> <formats> <format>application/pdf</format> </formats> </resource>