title: Electrochemical-assisted photodegradation of mixed dye and textile effluents using TiO2 thin films.
abstract: Mixed dye consists of six commercial dyes and textile effluents from cotton dyeing process were treated by electrochemical-assisted photodegradation under halogen lamp illumination. Two types of effluents were collected which are samples before and after undergone pre-treatment at the factory wastewater treatment plant. The photodegradation process was studied by evaluating the changes in concentration employing UV-vis spectrophotometer (UV-vis) and total organic carbon (TOC) analysis. The photoelectrochemical degradation of mixed dye was found to follow the Langmuir Hinshelwood pseudo-first order kinetic while pseudo-second order kinetic model for effluents by using TOC analyses. The chemical oxygen demand (COD) and biochemical oxygen demand (BOD) values of mixed dye and raw effluents were reported. Photoelectrochemical characteristic of pollutants was studied using the cyclic voltammetry technique. Raw effluent was found to exhibit stronger reduction behaviour at cathodic bias potential but slightly less photoresponse at anodic bias than mixed dye.
authors.affiliation: Department of Chemistry, Universiti Putra Malaysia, 43400 UPM Serdang, Malaysia. zulkar@fsas.upm.edu.my
authors.forename: Zulkarnain
authors.initials: Z
authors.lastname: Zainal
authors.forename: Chong Yong
authors.initials: CY
authors.lastname: Lee
authors.forename: Mohd Zobir
authors.initials: MZ
authors.lastname: Hussein
authors.forename: Anuar
authors.initials: A
authors.lastname: Kassim
authors.forename: Nor Azah
authors.initials: NA
authors.lastname: Yusof
mesh_terms: D004396:Coloring Agents / Q000737:chemistry* / Q000528:radiation effects*; D004563:Electrochemistry; D007220:Industrial Waste; D010777:Photochemistry; D013784:Textiles; D014025:Titanium / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000528:radiation effects*; D018508:Water Purification / Q000379:methods
chemical_list: D004396:Coloring Agents; D007220:Industrial Waste; D014874:Water Pollutants, Chemical; C009495:titanium dioxide; D014025:Titanium