Identification of alpha-beta unsaturated aldehydes as sources of toxicity to activated sludge biomass in polyester manufacturing wastewater

dc.creatorCaffaro-Filho, RA
dc.creatorWagner, R
dc.creatorUmbuzeiro, GA
dc.creatorGrossman, MJ
dc.creatorDurrant, LR
dc.date2010
dc.date2014-11-14T21:32:14Z
dc.date2015-11-26T16:08:33Z
dc.date2014-11-14T21:32:14Z
dc.date2015-11-26T16:08:33Z
dc.date.accessioned2018-03-28T22:57:08Z
dc.date.available2018-03-28T22:57:08Z
dc.identifierWater Science And Technology. Iwa Publishing, v. 61, n. 9, n. 2317, n. 2324, 2010.
dc.identifier0273-1223
dc.identifierWOS:000277498900019
dc.identifier10.2166/wst.2010.054
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/69133
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/69133
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/69133
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1266391
dc.descriptionWastewater generated in industrial production processes are often contaminated by hazardous chemicals. Characterization by means of toxicity-directed analysis is useful for identifying which fractions of a waste stream possess the most toxicity. We applied this approach to evaluate toxic components of a polyester manufacturing wastewater. Using the reduction in oxygen uptake rate of activated sludge as an indicator of toxicity, it was determined that increasing the pH from 3 to 11 followed by air stripping significantly reduced the toxicity of the wastewater. Comparative headspace GC/MS analysis of wastewater at different pHs selected a group of Volatile Organic Compounds (VOCs) associated with the observed effect of air stripping at pH 11. Ten of these compounds were identified as alpha,beta unsaturated aldehydes (acrolein (2-propenal) congeners); these compounds are known to be toxic as well as mutagenic. Confirmation that these compounds were a cause of toxicity was achieved by demonstrating that removal of these compounds by air stripping significantly reduced the wastewater mutagenic potency in a Salmonella mutagenicity assay. Formation of these volatile compounds by base catalyzed aldol condensation at pH 11 may account for the effectiveness of air stripping in reducing toxicity. To date there is no record in the literature about the toxicity and presence of acrolein congeners in polyester manufacturing wastewater.
dc.description61
dc.description9
dc.description2317
dc.description2324
dc.descriptionMinistry of Education of Brazil
dc.languageen
dc.publisherIwa Publishing
dc.publisherLondon
dc.publisherInglaterra
dc.relationWater Science And Technology
dc.relationWater Sci. Technol.
dc.rightsfechado
dc.sourceWeb of Science
dc.subjectacrolein congeners
dc.subjectaldol condensation
dc.subject2-butenal
dc.subjectcrotonaldehyde
dc.subjectmutagenicity
dc.subjectpolyester manufacturing wastewater
dc.subject2-propenal
dc.subjecttoxicity
dc.subjecttoxicity-directed analysis
dc.subjectalpha,beta unsaturated aldehydes
dc.subjectOrganic Toxicants
dc.subjectDirected Analysis
dc.subjectAquatic Toxicity
dc.subjectMutagenicity
dc.subjectGenotoxicity
dc.subjectTreatability
dc.subjectWastewaters
dc.subjectEffluent
dc.subjectIndustry
dc.subjectResin
dc.titleIdentification of alpha-beta unsaturated aldehydes as sources of toxicity to activated sludge biomass in polyester manufacturing wastewater
dc.typeArtículos de revistas


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