Investigation of triclosan fate and toxicity in continuous-flow activated sludge systems

Stasinakis, AS; Petalas, AV; Mamais, D; Thomaidis, NS; Gatidou, G; Lekkas, TD

dc.contributor.author	Stasinakis, AS	en
dc.contributor.author	Petalas, AV	en
dc.contributor.author	Mamais, D	en
dc.contributor.author	Thomaidis, NS	en
dc.contributor.author	Gatidou, G	en
dc.contributor.author	Lekkas, TD	en
dc.date.accessioned	2014-03-01T01:26:32Z
dc.date.available	2014-03-01T01:26:32Z
dc.date.issued	2007	en
dc.identifier.issn	0045-6535	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18114
dc.subject	Biodegradation	en
dc.subject	COD removal	en
dc.subject	Nitrification	en
dc.subject	Removal	en
dc.subject	TCS	en
dc.subject	Wastewater	en
dc.subject.classification	Environmental Sciences	en
dc.subject.other	Biodegradation	en
dc.subject.other	Biomass	en
dc.subject.other	Chemical oxygen demand	en
dc.subject.other	Concentration (process)	en
dc.subject.other	Dissolution	en
dc.subject.other	Toxicity	en
dc.subject.other	Activated sludge systems	en
dc.subject.other	Ammonia removal	en
dc.subject.other	Non-acclimatized biomass	en
dc.subject.other	Activated sludge process	en
dc.subject.other	ammonia	en
dc.subject.other	triclosan	en
dc.subject.other	Activated sludge process	en
dc.subject.other	Biodegradation	en
dc.subject.other	Biomass	en
dc.subject.other	Chemical oxygen demand	en
dc.subject.other	Concentration (process)	en
dc.subject.other	Dissolution	en
dc.subject.other	Toxicity	en
dc.subject.other	activated sludge	en
dc.subject.other	antibiotics	en
dc.subject.other	biodegradation	en
dc.subject.other	chemical oxygen demand	en
dc.subject.other	nitrification	en
dc.subject.other	sorption	en
dc.subject.other	toxicity test	en
dc.subject.other	waste treatment	en
dc.subject.other	wastewater	en
dc.subject.other	acclimatization	en
dc.subject.other	article	en
dc.subject.other	biodegradation	en
dc.subject.other	biomass	en
dc.subject.other	concentration (parameters)	en
dc.subject.other	detoxification	en
dc.subject.other	nitrification	en
dc.subject.other	performance	en
dc.subject.other	sludge	en
dc.subject.other	suspended particulate matter	en
dc.subject.other	Ammonia	en
dc.subject.other	Biodegradation, Environmental	en
dc.subject.other	Biomass	en
dc.subject.other	Sewage	en
dc.subject.other	Triclosan	en
dc.subject.other	Waste Disposal, Fluid	en
dc.subject.other	Water Pollutants, Chemical	en
dc.title	Investigation of triclosan fate and toxicity in continuous-flow activated sludge systems	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.chemosphere.2007.01.047	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.chemosphere.2007.01.047	en
heal.language	English	en
heal.publicationDate	2007	en
heal.abstract	The purpose of this research was to study the fate and toxicity of triclosan (TCS) in activated sludge systems and to investigate the role of biodegradation and sorption on its removal. Two continuous-flow activated sludge systems were used; one system was used as a control, while the other received TCS concentrations equal to 0.5 and 2 mg 1(-1). At the end of the experiment, 1 mg 1(-1) TCS was added in the control system to investigate TCS behaviour and effects on non-acclimatized biomass. For all concentrations tested, more than 90% of the added TCS was removed during the activated sludge process. Determination of TCS in the dissolved and particulate phase and calculation of its mass flux revealed that TCS was mainly biodegraded. Activated sludge ability to biodegrade TCS depended on biomass acclimatization and resulted in a mean biodegradation of 97%. Experiments with batch and continuous-flow systems revealed that TCS is rapidly sorbed on the suspended solids and afterwards, direct biodegradation of sorbed TCS is performed. Regarding TCS effects on activated sludge process, addition of 0.5 mg 1-1 TCS on non-acclimatized biomass initially deteriorated ammonia removal and nitrification capacity. After acclimatization of biomass, nitrification was fully recovered and further increase of TCS to 2 mg 1(-1) did not affect the performance of activated sludge system. The effect of TCS on organic substrate removal was minor for concentrations up to 2 mg 1-1, indicating that heterotrophic microorganisms are less sensitive to TCS than nitrifiers. (C) 2007 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Chemosphere	en
dc.identifier.doi	10.1016/j.chemosphere.2007.01.047	en
dc.identifier.isi	ISI:000246879500024	en
dc.identifier.volume	68	en
dc.identifier.issue	2	en
dc.identifier.spage	375	en
dc.identifier.epage	381	en