Biodegradability and toxicity assessment of a real textile wastewater effluent treated by an optimized electrocoagulation process

• Type: Article in International Scientific Journal
• Date: 2015

Authors

Diego R. Manenti (Author) FEUP; Aparecido N. Módenes (Author) Other; Petrick A. Soares (Author) FEUP; Rui A. R. Boaventura (Author) FEUP; Soraya M. Palácio (Author) Other; Fernando H. Borba (Author) Other; Fernando R. Espinoza-Quiñones (Author) Other; Rosângela Bergamasco (Author) Other; Vítor J. P. Vilar (Author) FEUP

Journal

Title: ENVIRONMENTAL TECHNOLOGY

Vol. 36 No. 4

Pages: 496-506

ISSN: 0959-3330

Publisher: Taylor & Francis

Indexing

ISI Web of Knowledge - 14 Citations

ISI Web of Science

Scopus - 22 Citations

INSPEC

Scientific classification

FOS: Engineering and technology > Environmental engineering

CORDIS: Technological sciences > Technology > Environmental technology

Associated Projects

LA 20 - PROJECTO ESTRATÉGICO - LA 20 - 2013-2014

Other information

Authenticus ID: P-00A-2PD

DOI: 10.1080/09593330.2014.952676

Abstract (EN): In this work, the application of an iron electrode-based electrocoagulation (EC) process on the treatment of a real textile wastewater (RTW) was investigated. In order to perform an efficient integration of the EC process with a biological oxidation one, an enhancement in the biodegradability and low toxicity of final compounds was sought. Optimal values of EC reactor operation parameters (pH, current density and electrolysis time) were achieved by applying a full factorial 3(3) experimental design. Biodegradability and toxicity assays were performed on treated RTW samples obtained at the optimal values of: pH of the solution (7.0), current density (142.9 A m(-2)) and different electrolysis times. As response variables for the biodegradability and toxicity assessment, the Zahn-Wellens test (D-t), the ratio values of dissolved organic carbon (DOC) relative to low-molecular-weight carboxylates anions (LMCA) and lethal concentration 50 (LC50) were used. According to the D-t, the DOC/LMCA ratio and LC50, an electrolysis time of 15 min along with the optimal values of pH and current density were suggested as suitable for a next stage of treatment based on a biological oxidation process.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11