Multivariate analysis of anionic, cationic and nonionic textile surfactant degradation with the H(2)O(2)/UV-C process by using the capabilities of response surface methodology |
| |
Authors: | Olmez-Hanci Tugba Arslan-Alaton Idil Basar Gulcan |
| |
Affiliation: | Faculty of Civil Engineering, Department of Environmental Engineering, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey. tolmez@itu.edu.tr |
| |
Abstract: | Anionic, cationic and nonionic surfactants being frequently employed in the textile preparation process were subjected to H(2)O(2)/UV-C treatment. As a consequence of the considerable number of parameters affecting the H(2)O(2)/UV-C process, an experimental design methodology was used to mathematically describe and optimize the single and combined influences of the critical process variables treatment time, initial H(2)O(2)concentration and chemical oxygen demand (COD) on parent pollutant (surfactant) as well as organic carbon (COD and total organic carbon (TOC)) removal efficiencies. Multivariate analysis was based on two different photochemical treatment targets; (i) full oxidation/complete treatment of the surfactants or, alternatively, (ii) partial oxidation/pretreatment of the surfactants to comply with the legislative discharge requirements. According to the established polynomial regression models, the process independent variables "treatment time" (exerting a positive effect) and "initial COD content" (exerting a negative effect) played more significant roles in surfactant photodegradation than the process variable "initial H(2)O(2) concentration" under the studied experimental conditions. |
| |
Keywords: | ANOVA analysis of variance AOP advanced oxidation process CCD central composite design COD chemical oxygen demand (mg L?1) CODo initial COD (mg L?1) DAD diode-array detector DBAS Disulphine Blue Active Substances DOS dioctyl sulfosuccinate ETHT quaternary ammonium ethoxylate Exp experimental F-value Fisher value FLD fluorescence detector FO full oxidation HPLC high performance liquid chromatography H2O2 hydrogen peroxide H2O2o initial H2O2 concentration (mg L?1) NPEO nonyl phenol ethoxylate PC parent compound Pred predicted PO partial oxidation PROB probability R2 coefficient of variation RSM response surface methodology tr reaction time (min) TOC total organic carbon (mg L?1) |
本文献已被 ScienceDirect PubMed 等数据库收录! |