Innovative Method for Water Deiron Ions Using Capillary Material

Abstract

Among all known inorganic pollutants of wastewater and natural water that adversely affect water bodies, different living organisms and human beings, iron compounds are the most common. Before discharging the wastewater into water bodies, it is important to remove iron ions from wastewater. The application of capillary materials in water and wastewater treatment is a promising direction of ecology and technology. The capillary properties of materials allow the development of quite simple, autonomous, highly efficient and energy-saving systems for water purification. The aim of the present paper was the investigation of the influence of the basic conditions of the filtration process with the application of capillary materia on the efficiency of iron ions removal. The initial concentration of the model solution, pH and temperature of the filtration process, as well as the contact area of the liquid phase with oxygen of the air were studied. The proposed method is appropriate for the treatment of water in the concentration range from 5 to 10 mg/dm 3 with an optimum pH in the range of 4-7. The experimental data showed high efficiency of capillary materials application, providing sufficient removal of iron ions from low concentrated solutions, compared to the traditional method of precipitation. The main advantage of the capillary materials is the simplicity of their application, quite high degree of purification and there no need to consume electricity or additional reagents, which allows creating autonomous water treatment facilities and plants.

Devising a comprehensive technology for treating industrial iron sulfate-containing effluents of galvanic production

“…Iron sulfate solutions, which are formed in significant quantities after etching operations of various steels and subsequent washing stages, are particularly difficult to clean, and require the latest environmentally safe disposal methods. An innovative method of wastewater purification from iron ions is filtration using capillary materials [9]. However, its use is possible only for the extraction of impurities from low-concentration solutions at the level of pollution of natural waters, which is not inherent in wastewater from galvanic production.…”