Abstract
Anionic, cationic and nonionic surfactants being frequently employed in the textile preparation process were subjected to H2O2/UV-C treatment. As a consequence of the considerable number of parameters affecting the H2O2/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 H2O2concentration 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 H2O2 concentration" under the studied experimental conditions.
Original language | English |
---|---|
Pages (from-to) | 193-203 |
Number of pages | 11 |
Journal | Journal of Hazardous Materials |
Volume | 185 |
Issue number | 1 |
DOIs | |
Publication status | Published - 15 Jan 2011 |
Funding
The authors acknowledge the financial support of the Scientific and Technological Research Council of Turkey (TUBITAK) under project number 108Y051 and Eksoy Chemicals for providing the textile surfactant brands. The authors are grateful to Betul Hande Gursoy, Asli Akin, Andrej Melihen and Elif Dedetas for giving a hand in the photochemical treatability experiments.
Funders | Funder number |
---|---|
TUBITAK | 108Y051 |
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu |
Keywords
- Anionic
- Cationic and nonionic surfactants
- Central composite design
- HO/UV-C treatment
- Optimization of full and partial oxidation
- Response surface methodology
- Textile preparation process