Application of response surface methodology for dimethyl phthalate treatment via H2O2/UV-C process

Işık Kabdaşlı*, Tugba Olmez-Hanci, Olcay Tünay, Damla Gülhan, Çisem Ecer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


In the present study, the reaction conditions required for the oxidation of dimethyl phthalate (DMP), being selected as a model endocrine disrupting compound, with the H2O2/UV-C treatment process were optimized using central composite design and response surface methodology (CCD–RSM). Initial DMP (DMPo = 20–100 mg/L) concentration, initial H2O2 dosages (H2O2o = 5–45 mM), and treatment time (tr = 2–18 min) were selected as critical process parameters (independent variables) while DMP and total organic carbon (TOC) abatements were chosen as the responses (dependent variables). Analysis of variance revealed that the variables “treatment time” and “initial DMP” were the process-independent parameters most positively and negatively affecting the treatment performance, respectively. According to the established polynomial regression models, for the degradation of the DMP at an initial concentration of 60 mg/L, the optimized treatment conditions were 25 mM of H2O2o and treatment time of 10 min. At these reaction conditions, complete DMP degradation and 28% TOC removal were obtained. By GC/MS analysis, phthalic acid and 4-hydroxy-1,2-benzoic dicarboxylic acid, dimethyl ester were identified as the aromatic oxidation intermediates.

Original languageEnglish
Pages (from-to)26165-26173
Number of pages9
JournalDesalination and Water Treatment
Issue number54
Publication statusPublished - 19 Nov 2016

Bibliographical note

Publisher Copyright:
© 2016 Balaban Desalination Publications. All rights reserved.


  • Dimethyl phthalate
  • Endocrine disrupting compounds
  • HO/UV-C process
  • Oxidation intermediates
  • Response surface methodology


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