Нанотехнологии в строительстве (Oct 2018)
Wastewater treatment system based on nanomodified natural sorbents
Abstract
Protection of water resources from contamination is considered as one of the global problem of the present day. Wastewater of almost all economic entities contains oil products, heavy metal compounds and other pollutants. Many effective wastewater treatment systems can provide purification index up to 99.9%, but operation of such systems entails significant costs, therefore many economic entities neglect environmental protection standards despite heavy penalties. The main task of modern technological systems is the development of environmentally safe technologies with the most closed cycle and the minimum amount of waste. The current situation in this field of research has necessitated the improvement of sorption technologies and selective processes for treatment of contaminated solutions and process fluids for the integrated solution of resource-saving and environmental problems. The target studies of wide range of sorption materials applied in wastewater treatment resulted in further development for processes of adsorption of oil products and heavy metal ions on natural sorbents and their analogs. That is why design of cost-effective wastewater treatment systems that would ensure high purity is a challenge for all countries. This paper suggests a multi-stage treatment system based on nanoactivated natural sorbents employed in a closed-loop water cycle. The advantage of using such treatment system as compared to the existing ones is demonstrated on the example of economic entities operating in the machine building industry in Russia, the USA and Israel.
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