fulltext.study @t Gmail

Photodegradation of petrol station wastewater after coagulation/flocculation with tannin-based coagulant

Paper ID Volume ID Publish Year Pages File Format Full-Text
55030 47038 2013 5 PDF Available
Title
Photodegradation of petrol station wastewater after coagulation/flocculation with tannin-based coagulant
Abstract

This work investigates the combined treatment of petrol station wastewater by coupling coagulation/flocculation and heterogeneous photocatalysis processes.Coagulation/flocculation was performed using a tannin-based coagulant, Tanfloc. Commercial TiO2, ZnO and Nb2O5 were applied as photocatalysts, after calcination at 500 °C/5 h. In order to evaluate synergic effects, the semiconductor oxides were mixed (50 wt%) and their activities were investigated under UV and VIS radiations. High reductions of absorbance, chemical oxygen demand and elimination of toxicity to Artemia salina was achieved with TiO2–ZnO under UV radiation. Chemical oxygen demand was reduced from 1363 mg L−1 (untreated) to 362 mg L−1 after coagulation/flocculation and finally to 104 mg L−1 after photocatalytic treatment.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (70 K)Download as PowerPoint slideHighlights► Petrol station wastewater was collected and characterised. ► Coagulation/flocculation process was applied before photocatalysis. ► TiO2, ZnO and Nb2O5 were mixed in order to evaluate synergic effects. ► UV and VIS radiations were applied. ► TiO2–ZnO showed the best results under UV radiation.

Keywords
Photocatalysis; TiO2 catalyst; ZnO catalyst; Petrol station wastewater
First Page Preview
Photodegradation of petrol station wastewater after coagulation/flocculation with tannin-based coagulant
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 209, 15 June 2013, Pages 79–83
Authors
, , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis