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Korean Journal of Chemical Engineering

, Volume 35, Issue 5, pp 1128–1136 | Cite as

Effect of dissolved oxygen/nZVI/persulfate process on the elimination of 4-chlorophenol from aqueous solution: Modeling and optimization study

  • Mansour Baziar
  • Ramin Nabizadeh
  • Amir Hossein Mahvi
  • Mahmood Alimohammadi
  • Kazem Naddafi
  • Alireza Mesdaghinia
  • Hassan Aslani
Environmental Engineering
  • 64 Downloads

Abstract

4-Chlorophenol (4-CP) is a hazardous and toxic chemical that enters into water bodies mainly through industrial effluents. The present study investigated the effect of under pressure dissolved oxygen on 4-CP degradation in the presence of nanoscale zero-valent iron (nZVI) and sodium persulfate. The impact of oxygen pressure, as a qualitative variable at three levels (1, 1.5 and 2 atm), along with five quantitative variables, including persulfate concentration (0-2mM), nZVI dosage (0-1 g/L), pH (3-11), reaction time (5-90min) and 4-CP concentration (50-500mg/L) on the 4-CP elimination from aqueous solutions, was examined using response surface methodology. There was a direct relationship between the dissolved oxygen under pressure and the 4-CP removal efficiency. Also, the gained R2 and adjusted R2 for three developed models of 1, 1.5 and 2 atm oxygen pressure were 0.971 and 0.9569, 0.9689 and 0.9538, and 0.9642 and 0.9468, respectively. The best removal process conditions for pH 4.2, 1.6mM persulfate, 64.79 min reaction time, 97.89mg/L initial 4-CP and 1 g/L nZVI dosage. The results indicated that dissolved oxygen under pressure-nZVI-persulfate could be considered a promising process for elimination of organic compounds from aqueous solutions.

Keywords

Persulfate nZVI Under Pressure Dissolved Oxygen RSM 

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Copyright information

© Korean Institute of Chemical Engineers, Seoul, Korea 2018

Authors and Affiliations

  • Mansour Baziar
    • 1
  • Ramin Nabizadeh
    • 1
    • 2
  • Amir Hossein Mahvi
    • 1
  • Mahmood Alimohammadi
    • 1
  • Kazem Naddafi
    • 1
  • Alireza Mesdaghinia
    • 1
  • Hassan Aslani
    • 3
  1. 1.Department of Environmental Health Engineering, School of Public HealthTehran University of Medical SciencesTehranIran
  2. 2.Center for Air Pollution Research, Institute for Environmental ResearchTehran University of Medical SciencesTehranIran
  3. 3.Department of Environmental Health Engineering, School of Public HealthTabriz University of Medical SciencesTabrizIran

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