Fenton oxidation of cork cooking wastewater-overall kinetic analysis

• Type: Article in International Scientific Journal
• Date: 2003

Authors

Anabela M. F. M. Guedes (Author) Other; Luís Madeira (Author) FEUP; Rui Boaventura (Author) FEUP; Carlos Costa (Author) FEUP

Journal

Title: Water Research

Vol. 37 No. 13

Pages: 3061-3069

ISSN: 0043-1354

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 153 Citations

ISI Web of Science

Scopus - 193 Citations

COMPENDEX

Scientific classification

CORDIS: Technological sciences > Technology > Chemical technology > Biochemical technology

Other information

Authenticus ID: P-000-G65

DOI: 10.1016/s0043-1354(03)00178-7

Abstract (EN): In the present work, the possibility of using chemical oxidation through Fenton's reagent for the pre-treatment of cork cooking wastewaters was exploited. Aiming both the selection of the best operating conditions (pH, Fe2+:H2O2 ratio and initial H2O2 concentration) and the evaluation of the overall reaction kinetics, trials were performed in a batch reactor. Operating at pH = 3.2, H2O2 concentration = 10.6 g/L and Fe2+:H2O2 ratio = 1:5 (by weight), about 66.4% of total organic carbon (TOC), 87.3% of chemical oxygen demand (COD) and 70.2% of biochemical oxygen demand (BOD5) were removed and an increase of the BOD5/COD ratio from 0.27 to 0.63 was achieved. In the temperature range 20-50degreesC, the best performance was obtained at 30degreesC. The kinetic study was undertaken at different initial TOC concentrations and temperatures. Overall kinetics can be described by a second-order followed by a zero-order rate equation and the apparent kinetic constants at 30degreesC are k = 2.3 x 10(-4) L/mg min and k(0) = 26.0 mg/L min, respectively. The experiments performed at different temperatures confirmed the global kinetic model and allowed to calculate the global activation energy for the second-order reaction (70.7 U/mol).

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9