Water treatment

Water treatment

Session 1.1. Water treatment

Title: Drinking water treatment – Focus on technologies for emerging pollutants

Drinking water treatment aims in removing or breaking-down contaminants that are present in raw water in order to produce water that is pure and safe for human consumption and aesthetically acceptable by consumers, without any risk for adverse health effects.  Common processes involved in drinking water treatment include disinfection, coagulation, filtration and chemical oxidation. However, it has been shown that those processes may not always be effective in removing or degrading certain classes of hazardous pollutants, especially new “emerging pollutants”, even if those may occur in low concentrations (micropollutants). Emerging pollutants include both anthropogenic compounds (e.g. pharmaceuticals and personal care products, per- and polyfluoroalkyl substances, nano-engineered materials, microplastics), natural compounds (e.g. cyanotoxins, taste & odor compounds, natural organic matter) as well as their transformation products formed in nature or during water treatment. Research on advanced water treatment processes aims to provide alternatives to replace or complement conventional treatment in order to effectively combat this problem. A wide array of techniques that are currently studied for this purpose include processes that rely on oxidative degradation of pollutants (i.e. advanced oxidation processes, AOPs), advanced reductive processes (ARP), advanced sorption processes, and membrane technologies. Furthermore, new improved (nano)materials are engineered and studied to be applied for adsorption and separation of emerging pollutants during water treatment.  Other topics will include advanced disinfection for emerging pathogens, new guidelines in water treatment and emerging concepts that will secure good quality water and protection of human health.

This session will present recent advances and innovations in water treatment processes, especially focusing on removal or degradation of emerging pollutants. Special topics include:

  • Emerging contaminants relevant to water treatment, including pharmaceuticals, personal care products, perfluorinated chemicals, emerging pathogens, nanomaterials, micro/nanoplastics, lead, oxyanions and other inorganic contaminants.
  • Novel applications of oxidation processes, including homogenous-heterogeneous catalysis, photocatalysis (UV/Solar/visible), ozone and hydrogen peroxide -based techniques, sonolysis, radiolysis etc. applied in drinking water treatment.
  • Advanced reduction processes relevant to water treatment
  • Membranes, adsorption and other separation processes
  • Innovations in removal of emerging pollutants with use of novel (nano)materials.
  • Understanding the mechanisms of degradation and removal of pollutants.
  • Studies of the effectiveness and efficiency of advanced water treatment processes.
  • Process integration and advanced monitoring.
  • Applicability and scaling-up (from lab to pilot and real scale) including possible point-of-use applications considering value/cost, energy consumption, use of chemicals (green aspect) and the circular economy concept.

Session Chairs: Dionysios (Dion) Dionysiou, Univ. of Cincinnati, USA (dionysios.d.dionysiou@uc.edu), Anastasia Hiskia, NCSR Demokritos, Greece (a.hiskia@inn.demokritos.gr), Triantafyllos Kaloudis, EYDAP SA, Greece (kaloudis@eydap.gr), Polycarpos Falaras, NCSR Demokritos, Greece (p.falaras@inn.demokritos.gr).