| Title: | Removal of organic matter from a variety of water matrices by UV photolysis and UV/H2O2 method |
| Author(s): | Vilhunen S; Vilve M; Vepsalainen M; Sillanpaa M; |
| Address: | "Laboratory of Applied Environmental Chemistry, Department of Environmental Sciences, University of Kuopio, Patteristonkatu 1, FI-50100 Mikkeli, Finland. sari.vilhunen@uku.fi" |
| DOI: | 10.1016/j.jhazmat.2010.03.070 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "A re-circulated flow-through photoreactor was used to evaluate the ultraviolet (UV) photolysis and UV/H(2)O(2) oxidation process in the purification of three different water matrices. Chemically coagulated and electrocoagulated surface water, groundwater contaminated with creosote wood preservative and 1,2-dichloroethane (DCE) containing washing water from the plant manufacturing tailor-made ion-exchange resins were used as sample waters. The organic constituents of creosote consist mainly of harmful polycyclic aromatic hydrocarbons (PAH) whereas 1,2-DCE is a toxic volatile organic compound (VOC). Besides analyzing the specific target compounds, total organic carbon (TOC) analysis and measurement of change in UV absorbance at 254 nm (UV(254)) were performed. Initial TOC, UV(254) and pH varied significantly among treated waters. Initial H(2)O(2) concentrations 0-200 mg/l were used. The UV/H(2)O(2) treatment was efficient in removing the hazardous target pollutants (PAHs and 1,2-DCE) and natural organic matter (NOM). In addition, high removal efficiency for TOC was achieved for coagulated waters and groundwater. Also, the efficiency of direct photolysis in UV(254) removal was significant except in the treatment of 1,2-DCE containing washing water. Overall, UV(254) and TOC removal rates were high, except in case of washing water, and the target pollutants were efficiently decomposed with the UV/H(2)O(2) method" |
| Keywords: | Creosote/chemistry Ethylene Dichlorides/chemistry Fresh Water/analysis/chemistry Hydrogen Peroxide/*chemistry Indicators and Reagents Ion Exchange Resins Kinetics Organic Chemicals/*isolation & purification/radiation effects Oxidants/*chemistry Photochemi; |
| Notes: | "MedlineVilhunen, Sari Vilve, Miia Vepsalainen, Mikko Sillanpaa, Mika eng Research Support, Non-U.S. Gov't Netherlands 2010/04/13 J Hazard Mater. 2010 Jul 15; 179(1-3):776-82. doi: 10.1016/j.jhazmat.2010.03.070. Epub 2010 Mar 23" |
