Use Of Electrophoresis Technique To Study
Removal Of Toxic Metal Ions From Waste Water
By Adsorption On Mineral Surface
Author(s)
S. E. Elmofty
Abstract
Electrophoresis technique is used to investigate the sorption possibility of toxic
metal ions from aqueous solutions on clay minerals. Removal of heavy metals
such as cobalt, nickel, lead and cadmium from waste water was investigated.
Electrophoresis tests were performed as a function of pH for different heavy
metal cations to identify the mode and extent of interactions of adsorption in the
system. The adsorption isotherms and pH effect indicate that adsorption of metal
ions increase in the order of Co< Ni < Cd < Pb.
Keywords: electrophoresis, toxic heavy metals, adsorption, electrical double
layer.
1 Introduction
Nowadays, large quantities of metals and pollutants that are currently entering
the environment from various sources, thus, alternative methods to filter
wastewater are being studied. The interest towards finding cheaper and more
efficient adsorbents has created a surge in the amounts of research to be
conducted about adsorption. One of these areas of research focused upon cation
exchange phenomena. Mineral, such as clay, can absorb wastes from water
(e.g. Kara et al. [1]). Clay and sepiolite, both members of the palygorskite
family, are two such clays that adsorb metal cations from solutions.
Crystal structure, chemical composition, exchanging cations and small crystal
lattice size are responsible for much unique prosperity such as, large chemically
Keywords
electrophoresis, toxic heavy metals, adsorption, electrical double
layer
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