Abstract
In this paper, it has been proved that in wastewater purification technology from dyes the adsorption methods ensure practically the complete removal of all dyes. Modified activated carbons, obtained by semi-industrial scale from local renewable raw materials such as cobs, nut shells and grape seeds, have been tested for use in the detoxification technologies of aquatic environment. A significant role in this research is given to adsorption mechanisms of refractory substances on carbon adsorbents. As a result of the physicochemical study of adsorption processes, a scheme of the wastewater purification from dyes has been developed. Their amplified efficiency, in comparison to imported activated carbons, has been demonstrated in experiments, carried out at stations of surface water and groundwater purification, as well as at wastewater treatment plants. At this time, scientific research of the feasibility study and business plan for the economic unit of production of activated carbons, based on local raw materials in the Republic of Moldova, is in progress.
Highlights
One of the major problems of humanity today is the pollution
In order to increase the efficiency of wastewater purification methods by adsorption, the processes of flotation and coagulation should be applied [4, 5, 16]
The adsorption of dyes from aqueous solutions has a number of features for wastewater purification practice
Summary
One of the major problems of humanity today is the pollution. It is obvious that the natural environment is deteriorated gradually and ecological systems cannot adapt to the pressure of human activities, the self-regulating of ecosphere becoming increasingly difficult [1]. The primary water pollution, as a result of the direct influx of waste in waters, or their secondary pollution deriving from changes of harmful substances under the action of natural factors, can have multiple effects on environmental components. One of the major problems for the environment is wastewater containing organic substances, with aromatic structures, that are bio-non-degradable [3]. For the development of local technologies of the treatment of wastewater, containing detergents and dyes, additional scientific research is necessary
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