Heavy metals

The use of inorganic membranes in pollution treatment is actually limited by the cost of such membranes. Advantages of inorganic membranes over organic ones are their chemical, thermal and pH resistance. In this study, low cost ZnAl2O4-TiO2 ultrafiltration membranes were tested for removing Cd(NO3)2

The reuse of water coming from electrolysis manufactory effluents is studied by means of the electrodeionisation technique. A neutral water stream which contains small quantities of zinc, copper, cadmium and lead is treated. Results obtained by electrodialysis and ion exchange by resins are presente

Synthesised polyaniline coated onto silica gel and other natural materials such as peanut, almond, nut shells, apricot and olive seeds, etc., have been tested for the ability to retain metallic pollutants. Two adsorbents have been tested, namely silica gel and peanut shells, with copper as the metal

The feasibility in the use of a sodium dodecyl sulfate anionic surfactant and nonionic monoalkylphenol polyetoxilate to purify contaminated waters of Ni(II) ions has been studied. Both the retention coefficients and the transmembrane fluxes have been determined at purification of the different syste

The study has been aimed at finding out the specific features in purification of the water contaminated by Co(II) and Ni(II) ions by use of ultrafiltration in combination with chelation. Within an operating pressure range of 200 to 500 kPa, the maximum retention coefficient of Co(II) and Ni(II) ions