Innovation provider

Jagiellonian University

Contact

e-mail: radoslaw.rudz@uj.edu.pl
phone: +48 12 663 38 32
fax: +48 12 663 38 31

Description


Water contamination becomes a problem, which may limit civilization progress.
The development of a universal and inexpensive method of water purification is very difficult, because it may contain pollutants of different nature, e.g. heavy metals, organic compounds (pesticides, chlorinated aromatic compounds, antibiotics and surfactants) as well as bacteria. The water purification methods currently in use are based on osmosis, ion-exchange, adsorption, ultrafiltration, distillation and photooxidation. Although multifarious, they have limitations, mainly connected with their high power consumption and low efficiency.

The offered method of water purification is based on the photocatalytic degradation of contaminations. Photocatalysts are received as a results of the modification of layered nanoclays by polymers that can absorb both visible and ultraviolet light. Experimental tests have shown that hybrid photocatalysts may efficiently degrade water pollutants as a result of oxidation by singlet oxygen, energy or electron transfer. Moreover, it has been proved that hybrid photocatalysts have the ability to adsorb hydrophobic compounds thereby additionally improving the water purification process. Hybrid photocatalysts are especially well-suited for the photodegradation of pesticides, aromatic compounds (e.g. chlorinated aromatic compounds), phenols and cyanides.

Advantages


Hybrid photocatalysts based on layered nanoclays can become an attractive alternative method of water purification, particularly suitable for industrial plants using water in their technological process, e.g. in power, steel, chemical, pharmaceutical or food-processing plants. Moreover, they can be tailored for specific applications (pollutants).

Innovative aspects (ecologic, social and economic)

Most of the currently applied photocatalysts are based on low-molecular organic compounds, which are toxic and difficult to be removed from the photoreaction environment. Also, they often cannot be used in an aqueous environment, because of their insolubility. In comparison the key features of the hybrid photocatalysts, that are the subject of the presented offer, are as follows:
  • they can be used in an aqueous environment,
  • they are based on non-toxic natural minerals (kaolinite, bentonite, mica, talc, which are layered nanoclays),
  • at the same time they are capable of purifying water in a physical absorption process as well as in a photodegradation process, therefore they combine the advantages of the photochemical and the adsorption method of water purification,
  • they self-separate from water in the sedimentation process, so that they can be easily removed by filtration or decantation,
  • their photochemical components may be chromophores of natural origin (e.g. porphyrin derivatives).

Application examples

The research and development efforts concerning this technology are continued at the Faculty of Chemistry of the Jagiellonian University. Currently the Centre for Innovation, Technology Transfer and University Development (CITTRU) is looking for companies and institutions interested in obtaining a license for the material and its applications described above.

Cost

Downloads

Current stage of development

Available for demonstration – field tested

Intellectual Property Rights

Patent applied for

Country of origin

Poland

Country of application

Year

2012

National Contact Point

dr Włodzimierz A. Sokół
National Contact Point for Eco-efficient Technologies and Management Systems
Central Mining Institute (GIG)

Plac Gwarkow 1
40-166 Katowice
Poland

Tel: +48 32 259 22 11
Fax: +48 259 22 11

w.sokol@gig.eu
www.actclean.gig.eu