Advanced materials derived fro hydrotalcite-like compounds for the removal of the pollutants from wastewaters and liquid effluent (ECOPAM)

Project summary

One of the most important problems of the actual society is the one related to soil, water and atmosphere of people incomes and ensurement of people’s health. The project crreates the premises for the launching of a FP7 project under the framework of the depollution. The project proposes the development of
a complex integrated technology for the obtaining of advanced nanostructured materials with adsorbant, ion exchange and catalytic properties starting from raw materials – natural zeolites (clinoptilolite) and hydrotalcite-like compounds as well as the utilisation of these materials in processes for the depollution of industrial effluents (liquid and gaseous).

One of the research directions is the obtaining of advanced materials active for depollution by modulating the adsorbtion, ion exchange and catalytic capacities of the hydrotalcite-like compounds and of the clinoptilolite (available as natural indigenous resource) using different pre-treatment techniques in order to obtain tailored materials selective for different pollutants. It is forseen that the technology for the obtaining of the advanced materials will allow the recovery of the washing waters and therefore it will be an ecofriendly manufacturing procedure.

The second research direction is orientated towards the use of the obtained advanced materials for the depollution of industrial waste-waters aiming to reach the objectives imposed by the intern and international norms for ensuring the preservation and the sustainable management of water resources as well as low capital costs and limited energetic consumption. Actually the technologies for advanced purification of water are utilising as ion exchangers, anionites or cationites, organic resins, whose synthesis implies also the production of extremely toxic wastes. The replacement of these types of ion exchangers with clinoptilolite (natural cationite) and hydrotalcites (anionites that may be obtained by relatively cheap synthesis methods and les polluttant or even from natural resources such as hydrotalcite ores) lead to the decrease of the contamination hazard of the manufacturing procedure for the obtaining of the ion exchangers. Under the framework of this project, the elimination of the traces of transition metals (Ni, Cd, Pb, Cu, Zn, Cr) and of hydrophobic organic pollutants (phenols, benzene and its related compounds, dyes, etc) will be tested by coupling the adsorbtion and ion exchange processes (ecofriendly low energy consuming procedures) using as adsorbents /ion-exchangers the advanced materials obtained by modifying the properties of the natural zeolites – clinoptilolite-type and of the hydrotalcite-like compounds.

The third research direction refers to the removal of sulphur containg pollutants from liquid oil
fractions using catalytic procedures mediated by catalysts based on modified hydrotalcite/clinoptilolite in
order to obtain ecologic fuels by diminishing the SO2 emissions in the atmosphere following their utilisation in
transportation industry.

The fourth research direction points to the valorisation of the spent advanced materials after being utilised in depollution processes in order to decrease the amounts of waste, while respecting the basic principles of ecofriendly procedures. For this purpose, the possibility of using as catalysts, for the depollution of contaminated gaseous flows, the spent advanced materials (following the retention of the metallic ions from waste-waters by adsorption/ion exchange) will be considered.

The proposed technological variants will be assessed, verified and tested in order to select the optimal method from the point of view of financial advantages while respecting the european quality standards 91/271/EEC and the industrial safety norms.

The implementation of the new knowledge, technologies, nanomaterials and manufacturing procedures in sectorial and inter-sectorial applications is forseen. The realisation of the project will have a double impact on the environment: diminishing of the pollution and the higher valorisation of some indigeneous natural resources. The application of the technology at the economic agent implied in this project as well as the involvment of two SME as partners in this project will enhance the competitivity of the romanian products on
the european market and it will increase the physical production in our country with important social effects such as creating new jobs, increase of people’s incomes and the ensurement of people’s health. The project creates premises for the introduction of a FP7 project in the thematical domain 4. Nanosciences, Nanotehnologies, Materials and new Production Processes.

 

 

 

 

 

 

Last updated at: November 23, 2010.