Magnetic Separation:
An Alternative Method to the Treatment of Wastewater

N. Karapinar*

General Directorate of Mineral Research and Exploration, Technology Dept., 06520 Ankara, Turkey

Received 15 October 2002; accepted 15 June 2003


Increasingly strict discharge limits for wastewater have accelerated the research for effective treatment technologies. It is now well known that mineral processing techniques can provide solutions to the environmental problems. Magnetic separation method has been seen in this regard as an alternative method for wastewater treatment. As matter of fact, it has been well known that magnetic separation has been used for the removal of magnetic solid particles from wastewater. Recent progress in this field is the removal of non-magnetic water pollutants such as virus, algae and dissolved pollutants by magnetic separation. Results of research done in the past ten years have shown that the magnetic separation method can also be used for non-magnetic pollutants by seeding the wastewater with magnetic seeds (e.g., magnetite) which preferentially adsorb or co precipitate the material that is to be removed. In such applications, flocculants also may be added to facilitate the agglomeration and removal of the pollutants. With the advantages of high performance, cheapness, simplicity, compact process and workability at high flow rates, the magnetic separation could be an alternative method for wastewater treatment. This article describes the removal of non-magnetic water pollutants from wastewater by the magnetic separation method with a combination of magnetic seeding technique by giving examples of industrial applications in this field.

Keywords: Wastewater treatment; Magnetic seeding; Magnetic separation

* Corresponding author
   E-mail : karapinarnuray@hotmail.com