Development of Technique of Photocatalytic Purification of Waste Water
L.A.Mnjoyan Institute of Fine Organic Chemistry
The purpose of the present project is development of technology of photocatalytic purification of household and industrial waste water containing harmful organic substances, as well as new highly effective catalysts for the photocatalytic purification.
New highly effective photocatalysts with an adjustable porous structure will be synthesized in TiO2-Fe2O3-MnO2 system.
Earlier conducted experiments revealed advantages of catalysts representing a closely packed system of spherical particles of corresponding hydrosols. The most important advantage is that volume of catalyst remains invariable even after continuous use. Homogeneous pores ensure constancy of specific surface and high activity of the catalyst for a long time. It is assumed to investigate regularities of formation of porous structure of the developed catalysts having beforehand settled properties including surface ones.
All developed catalysts will be tested for photocatalytic purification waste water at the presence of oxidizers using the visible part of the spectrum. As the model waste water, low-oxidizing organic substances (urea, cyanuric, benzoic, phthalic and oxalic acids and their mixtures) will be used.
It is supposed to investigate the mechanism of photocatalytic oxidation of organic substances, time dependence of catalytic activity, destruction degree of organic compositions. The investigation will allow to reveal methods of improving photocatalytic processes and develop new technologies of photocatalytic purification of waste water.
Preliminary researches, already conducted by our team of the experienced scientists and engineers having numerous papers (up to 40) on the planned works, as well as obtained earlier positive results give confidence in successful realization of the Project.
Realization of the project will allow to solve a number problems meeting ISTC’s goals:
It is expected that fulfillment of the projected works will allow:
Introduction of the executed development and recommendations in industry will enable:
The project is open for cooperation with foreign collaborators. They could be both financial supports and co-partners in carrying out some stages of the project.
Statistical processing of obtained data will be carried out after completion of all experiments. On completion of each stage, after analysis and discussions of the results, recommendations will be prepared.
During the project work the known methods of syntehesizing of highly dispersed non-organic systems, physical and chemical methods of the analysis will be used: NMR, IR,UF and mass-spectroscopy,as well as KP and X-ray spectroscopy, gas-liquid chromatography, electron microscopy, porosity measurements, etc. A technique of monitoring of purification level of waste water will be developed.