Water Treatment Without Chemistry

Authors

  • Philippe Rychen
  • Werner Haenni
  • Laurent Pupunat

DOI:

https://doi.org/10.2533/000942903777678696

Keywords:

Boron-doped diamond electrodes, Disinfection, Electrolyser, Wastewater, Water treatment

Abstract

Thin-film boron-doped diamond coatings (BDD/Si) on boron-doped silicon substrates by means of a large-scale hot-filament chemical vapor deposition (HF CVD) process have been developed in order to be used as an innovative and efficient electrode material, mainly to promote electrochemical water treatment applications without using chemicals. Electrochemical performance from anodic as well as cathodic points of view results from extremely high chemical and mechanical stabilities as well as the largest known electrochemical window. They correspond to the primary conditions for an electrode in order to facilitate water processing like disinfection and reduction of the chemical oxygen demand (COD). These electrodes have the production capacity of the strongest chemical oxidizing agents in water i.e. hydroxyl radicals. They may also be responsible for the electrochemical generation of other strong oxidants like chlorine, ozone, peroxo-disulfates, peroxo-dicarbonates and hydrogen peroxide in many types of water, i.e. seawater, wastewater and fresh water, without the addition of any components.

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Published

2003-10-01

How to Cite

[1]
P. Rychen, W. Haenni, L. Pupunat, Chimia 2003, 57, 655, DOI: 10.2533/000942903777678696.

Issue

Section

Scientific Articles