Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/1586
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dc.contributor.authorMitru, Daniel-
dc.contributor.authorNechifor, Gheorghe-
dc.contributor.authorGheorghe, Stefania-
dc.contributor.authorBanciu, Alina-
dc.contributor.authorIonescu, Lucian-
dc.contributor.authorStoica, Catalina-
dc.contributor.authorIonica, Daniela-
dc.contributor.authorLucaciu, Irina-
dc.date.accessioned2020-02-11T13:41:49Z-
dc.date.available2020-02-11T13:41:49Z-
dc.date.issued2020-01-
dc.identifier.issn1582-9049-
dc.identifier.urihttp://hdl.handle.net/123456789/1586-
dc.descriptionRevista de Chimie, vol. 71, no. 1, 2020, pp. 100-106en_US
dc.description.abstractThe widespread use of detergents has raised concern with regard to the environmental pollution caused by their active substances, which are biorefractory, toxic or persistent. Even though anionic and non-ionic surfactants often used in commercial detergents composition are reasonably degradable under aerobic conditions and not particularly toxic at low concentrations, high concentration of surfactants influenced the activated sludge activity and are harmful for the aquatic environment. In the literature, data on the biodegradability and/or ecotoxicity of a certain type of surfactant (anionic, nonionic, cationic) are usually presented. Our study aimed to assess the biodegradability of a mixture of two types of surfactants (anionic mixed with non-ionic) and also, effects caused by their presence of elevated concentrations to the activated sludge microorganisms, within a batch experiment. We performed a biodegradability test (according Zahn Wellens method) on 2 synthetic solutions with high concentrations of anionic surfactant –methyl dodecylbenzene sulfonate (15-25 mg/L) and non-ionic surfactant -4-nonylphenyl-polyethylene glycol (10 mg/L). The study established different percent of biodegradability (measured by COD decrease and surfactants removal) depending on initial concentrations of anionic and nonionic surfactants in the tested solutions. High surfactants concentrations modulated the activity and morphology of activated sludge, so its degradation efficiency of the organic substrate has decreased. Surfactant solutions resulting from biodegradability experiment have been tested for toxicity to planktonic crustaceans (Daphnia magna).en_US
dc.description.sponsorshipThe authors acknowledge the scientific and financial support offered by Politehnica University of Bucharest and National Research and Development Institute for Industrial Ecology - ECOIND Bucharest.en_US
dc.language.isoen_USen_US
dc.publisherSYSCOM 18 SRLen_US
dc.subjectAnionic surfactantsen_US
dc.subjectNon-ionic surfactantsen_US
dc.subjectCODen_US
dc.subjectActivated sludgeen_US
dc.subjectFlocs morphologyen_US
dc.titleRemoval and effects of surfactants in activated sludge systemen_US
dc.typeArticleen_US
item.fulltextWith Fulltext-
item.grantfulltextopen-
item.cerifentitytypePublications-
item.languageiso639-1en_US-
item.openairetypeArticle-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
crisitem.author.deptNational Research and Development Institute for Industrial Ecology, ECOIND-
crisitem.author.deptUniversity Politehnica of Bucharest, Romania-
crisitem.author.deptNational Research and Development Institute for Industrial Ecology, INCD-ECOIND-
crisitem.author.deptNational Research and Development Institute for Industrial Ecology, INCD-ECOIND-
crisitem.author.deptNational Research and Development Institute for Industrial Ecology, ECOIND-
crisitem.author.orcid0000-0002-4963-8940-
crisitem.author.orcid0000-0002-3582-7695-
crisitem.author.orcid0000-0002-2347-508X-
crisitem.author.orcid0000-0003-0811-710X-
crisitem.author.orcid0000-0003-1352-157X-
crisitem.author.orcid0000-0002-1819-2050-
crisitem.author.orcid0000-0001-6413-3003-
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