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Título:	Respirometric study of optical brighteners in textile wastewater
Autor/a:	Salas Olivares, Héctor Manuel; Gutiérrez Bouzán, María Carmen; López Grimau, Víctor; Vilaseca Vallvé, M. Mercedes
Otros autores:	Universitat Politècnica de Catalunya. Doctorat en Enginyeria Ambiental; Universitat Politècnica de Catalunya. Institut d'Investigació Tèxtil i Cooperació Industrial de Terrassa; Universitat Politècnica de Catalunya. Departament d'Enginyeria de Projectes i de la Construcció; Universitat Politècnica de Catalunya. ENMA - Enginyeria del Medi Ambient
Abstract:	Optical brighteners (OBs) are colorless fluorescent dyes, widely used in industry to improve whiteness in materials. Nearly 80% of all OBs in the market are derivatives of stilbene. They absorb the near-ultraviolet light and re-emit most of it in the blue range as visible fluorescence. OBs are commonly applied on textiles, detergents, paper and plastic products, among others. OBs have a low degradation ratio. In biological plants, they can only be partially removed by adsorption into the sludge and a tertiary treatment could be required to fully remove them. Part of them may persist and can be found in river and lake waters. The current work aims to evaluate the effect of the OBs in the bacterial activity of biological wastewater treatment plants. The influence of two commercial OBs (Goldblanc BHA and Leucophor PC) on respiration rate was monitored by means of a semi-continuous electrolytic respirometer, in order to obtain information related to the growth of the biomass and the degradation of the substrate. Their acute toxicity was also determined. It was concluded that the OB effect on bacteria population is variable depending on its chemical structure. Unlike the former, the Leucophor-PC brightener had an impact on the respirometric rate.
Abstract:	Peer Reviewed
Materia(s):	-Àrees temàtiques de la UPC::Enginyeria tèxtil -Optical brighteners -Textile waste -optical brighteners -bacterial activity -respirometry -biodegradability -textile wastewater -Blanqueig -- Aspectes ambientals
Derechos:	Attribution 3.0 Spain http://creativecommons.org/licenses/by/3.0/es/
Tipo de documento:	Artículo - Versión publicada Artículo
Editor:	Multidisciplinary Digital Publishing Institute (MDPI)
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