Dr Chedly Tizaoui

Dr Chedly Tizaoui

Chedly Tizaoui


Associate Professor, College of Engineering


Specialist Subjects: Water and Wastewater Treatment Processes, Ozonation Systems, Photocatalysis, Hydrogen Peroxide Catalytic Oxidation, UV, Advanced Oxidation Processes (AOPs), Endocrine Disrupting Chemicals (EDCs)

Portfolio Director for Chemical and Environmental Engineering

Chartered Engineer, Corporate Member of the Institution of Chemical Engineers (IChemE), and Member of the International Ozone Association (IOA)

Find out more


  • Research interests in the area of water and wastewater treatment processes
  • Focuses on a range of oxidation and advanced oxidation techniques mainly ozonation, photocatalytic processes, and hydrogen peroxide catalytic oxidation
  • Well known work on novel ozonation techniques for water treatment 
  • Removal of Endocrine Disrupting Chemicals (EDCs)
  • Treatment of landfill leachates
  • Member of the Centre for Water Advanced Technologies and Environmental Research (CWATER)


Selected publications


  • EG-338 - Separation Processes II (14/15)
  • EG-M09 - Water and Wastewater Engineering (14/15)
  • EGA319 - Environmental Engineering Design Project (14/15)
  • EGA327 - Water and Wastewater Engineering (14/15)
  • EGA326 - Chemical Engineering Design Project (14/15)

Research thesis supervised


  • 2012 - 'A Novel Hybrid Ion Exchange/Nanofiltration process for water desalination' (1st Supervisor: Professor Nidal Hilal)
  • 2011 - Enhancement of membrane flux and properties by ozone and advanced oxidation processes for water treatment (2nd Supervisor: Professor Nidal Hilal)
  • 2010 - Novel ozonation systemfor the removal of endocrine disrupting chemicals (EDCs): pilot plant studies (2nd Supervisor: Professor Nidal Hilal)
  • 2010 - 'Boron Removal from Saline Water' (1st Supervisor: Professor Nidal Hilal)
  • 2009 - 'HA removal and fouling using tubular ceramic MF membranes combined with coagulation' (2nd Supervisor: Professor Nidal Hilal)
  • 2009 - 'Activated unsaturated sand filter as an alternative technology to remove copper, manganese, zinc and nickel from waters' (2nd Supervisor: Professor Nidal Hilal)
  • 2009 - Development of integrated nanofiltration system for highly concentrated dye removal (1st Supervisor: Professor Nidal Hilal)
  • 2009 - ''Treatment of saline solutions using air gap membrane distillation (AGMD)'' (1st Supervisor: Professor Nidal Hilal)
  • 2009 - 'Removal of heavy metals from a concentrated aqueous solution: adsorption and nanofiltration techniques' (1st Supervisor: Professor Nidal Hilal)
  • 2009 - ''Synthesis and characterisation of polyethersulfone membrane using different additives.'' (1st Supervisor: Professor Nidal Hilal)


  • 2010 - Heterogeneous catalytic ozonation for the degradation of organic compounds (2nd Supervisor: Professor Nidal Hilal)


  • 2013 - A Feasibility Study of Water Extraction to provide water supply to Viscose Closure’s extrusion process"
  • 2012 - 'Study on the effect of sludge recycle ratio on the formation of high density sludge in the treatment of tin-plating effluent at the Veolia Water treatment plant, Tata Steel, Trostre'
  • 2012 - 'Synthesis and characterisation of Pr3+ - activated upconversion materials for microbial inactivation in water'
  • 2012 - 'Photocatalytic degradation of reactive orange 16 dye pollutant in wastewater'
  • 2011 - 'Heterogeneous Nanocatalytic Ozonation'
  • 2010 - Ozonation of DEP by reactive adsorption technique

Additional information

Industry experience

  • To increase both international research profile and contacts with British industry, undertook a secondment to Yorkshire Water Services (YWS) funded by the Royal Academy of Engineering and a research leave at the National Institute of Scientific and Technical Research in Tunisia

Secondment to YWS gave an excellent experience with large scale ozonation systems and a real insight of the UK water sector needs and challenges



  • Mohammed Al-Abri, Chedly Tizaoui and Nidal Hilal, Combined macromolecular adsorption and coagulation for improvement of membrane separation in water treatment in Advances in Water Treatment and Pollution Prevention, Sanjay K. Sharma and Rashmi Sanghi (Eds.), Springer, ISBN 978-94-007-4203-1 (2012)
  • Essandoh, H.M.K., Tizaoui, C. and Mohamed, M.H.A. (2012). Removal of estrone (E1), 17β-estradiol (E2) and 17α-ethinylestradiol (EE2) during soil aquifer treatment of a model wastewater. Separation Science and Technology 47(6), 777-787
  • Tukur, A., Sharp, L., Stern, B., Tizaoui, C., and Benkreira, H. (2012). PET bottle use patterns and antimony migration into bottled water and soft drinks: the case of British and Nigerian bottles. Journal of Environmental Monitoring 14(4), 1237-1247
  • Al-Rashdi, B., Tizaoui, C., and Hilal, N. (2012). Copper removal from aqueous solutions using nano-scale diboron trioxide/titanium dioxide (B2O3/TiO2) adsorbent. Chemical Engineering Journal 183, 294-302
  • Tizaoui, C.,and Grima, N. (2011). Kinetics of the ozone oxidation of Reactive Orange 16 azo-dye in aqueous solution. Chemical Engineering Journal 173(2), 463-473
  • Essandoh, H.M.K., Tizaoui, C., Mohamed, M.H.A., Amy, G. and Brdjanovic, D. (2011). Soil aquifer treatment of artificial wastewater under saturated conditions. Water Research 45(14), 4211-4226
  • Tizaoui, C., Grima, N. and Hilal, N. (2011). Degradation of the antimicrobial triclocarban (TCC) with ozone. Chemical Engineering and Processing: Process Intensification 50(7), 637-643
  • Zahrim, A.Y., Tizaoui, C. and Hilal, N. (2011). Removal of highly concentrated industrial grade leather dye: Study on several flocculation and sand filtration parameters. Separation Science and Technology 46 (6), 883-892
  • Tizaoui C., Mezughi K. and Bickley R. (2011). Heterogeneous photocatalytic removal of the herbicide clopyralid and its comparison with UV/H2O2 and ozone oxidation techniques. Desalination 273(1), 197-204
  • Zahrim A.Y., Tizaoui C. and Hilal N. (2011) Coagulation with polymers for nanofiltration pre-treatment of highly concentrated dyes: A review. Desalination 266(1-3), 1-16
  • Draper F., Oltean-Dumbrava C., Tizaoui C. and Newbury B. (2011). Factors influencing attendance and success on the Institute of Environmental Management and Assessment Associate Membership Certificate course. Journal of Further and Higher Education 35(1), 1-23.
  • Zahrim A.Y., Tizaoui C. and Hilal N. (2010). Evaluation of several commercial synthetic polymers as flocculant aids for removal of highly concentrated CI Acid Black 210 dye. Journal of Hazardous Materials 182(1-3), 624-630
  • Tizaoui, C. and Zhang, Y. (2010) The Modelling of Ozone Mass Transfer in Static Mixers using Back Flow Cell Model. Chemical Engineering Journal162(2),557-564
  • Tizaoui, C., Karodia, N. and Aburowais, M. (2010) Kinetic study of the manganese-based catalytic hydrogen peroxide oxidation of a persistent azo-dye. Journal of Chemical Technology and Biotechnology 85, 234-242
  • Essandoh, H.M.K., Tizaoui, C., Mohamed, M.H.A., Amy, G. and Brdjanovic, D. (2010) Fate of triclocarban during soil aquifer treatment: soil column studies. Water Science and Technology 61(7), 1779-1785
  • Al-Abri, M., Dakheel, A., Tizaoui, C. and Hilal, N. (2010) Combined humic substance and heavy metals coagulation, and membrane filtration under saline conditions. Desalination 253(1-3), 46-50
  • Tizaoui, C., Grima, N.M. and Derdar, M.Z. (2009) Effect of the radical scavenger t-butanol on gas–liquid mass transfer. Chemical Engineering Science 64, 4375 - 4382
  • Tizaoui, C., Bickley, R.I., Slater, M.J., Wang, W.J., Ward, D.B. and Al-Jaberi, A. (2008) A comparison of novel ozone-based systems and photocatalysis for the removal of water pollutants. Desalination 227(1-3), 57-71
  • Tizaoui, C., Mansouri, L. and Bousselmi, L. (2007) Ozone catalysed with solids as an advanced oxidation process for landfill leachate treatment. Water Science and Technology 55(12), 237-243
  • Tizaoui, C., Bouselmi, L., Mansouri, L. and Ghrabi, A. (2007) Landfill leachate treatment with ozone and ozone/hydrogen peroxide systems. Journal of Hazardous Materials 140(1-2), 316-324
  • Ward, D.B., Tizaoui, C. and Slater, M.J. (2006) Wastewater dye destruction using ozone-loaded Volasil (TM) 245 in a continuous flow liquid-liquid/ozone system. Chemical Engineering and Processing 45(2), 124-139
  • Ward, D.B., Tizaoui, C. and Slater, M.J. (2005) Continuous extraction and destruction of chloro-organics in wastewater using ozone-loaded Volasil (TM) 245 solvent. Journal of Hazardous Materials 125(1-3), 65-79
  • Romdhane, M. and Tizaoui, C. (2005) The kinetic modelling of a steam distillation unit for the extraction of aniseed (Pimpinelia anisum) essential oil. Journal of Chemical Technology and Biotechnology 80(7), 759-766
  • Ward, D.B., Tizaoui, C. and Slater, M.J. (2004) Extraction and destruction of organics in wastewater using ozone-loaded solvent. Ozone-Science & Engineering 26(5), 475-486
  • Ward, D.B., Tizaoui, C. and Slater, M.J. (2003) Ozone-loaded solvents for use in water treatment. Ozone-Science & Engineering 25(6), 485-495
    Tizaoui, C. and Slater, M.J. (2003) Uses of ozone in a three-phase system for water treatment: Ozone adsorption. Ozone-Science & Engineering 25(4), 315-322
  • Tizaoui, C. and Slater, M.J. (2003) The design of an industrial waste-water treatment process using adsorbed ozone on silica gel. Process Safety and Environmental Protection 81(B2), 107-113
  • Tizaoui, C. (2003) Adsorbent for ozone recovery, University of Bradford, Patent number: WO2003090923-A; WO2003090923-A1; AU2003229925-A1

Funding awards

  • Royal Society grant of £5,752 under the International Exchanges Scheme

To develop in collaboration with INSAT at Tunisia an analytical technique for the analysis of the compound ptaquiloside (pta) in water.