Abstract
A new procedure for electroplating waste water treatment using a waste iron scrap by-product for nanoparticle ferriferous hydrosol (FFH) preparation is presented. FFH which contains Fe(II) and Fe(III) was employed for neutralization and heavy metal removal from electroplating wastewater as well as for decontamination of concomitant pollutants such as phosphates, organic compounds, residual oils, dyes and detergents. It is possible due to the simultaneous operation of several different mechanisms: sorption, coagulation, reduction, fertilization and etc. The method is suitable for the purposes of waste water treatment and disposal in compliance with environmental laws and is implemented in some East and West European countries. The results were proved in accredited laboratories in various countries. According to the composition of its water extractable fraction, remaining waste sludge could be safely deposited in urban waste repositories or used as a raw material for production of various technically useful products such as ceramics, pigment, etc. Treated water may be reused in technological processes.
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