THESIS
2014
iii leaves, iv-xiv, 95 pages : illustrations (some color) ; 30 cm
Abstract
In the present study, non-metallic fractions recycled from waste printed circuit boards were
activated by potassium hydroxide as activation agent under certain experimental conditions.
Various techniques were employed to investigate the characteristics of the raw and
activated materials. The results show that the original material has low surface area with
no presence of functional groups on it while the surface area of the activated material has
been significantly increased with surface functionalized groups.
In order to test the ability of the activated material as adsorbent for the treatment of heavy
metal-loaded effluent, cadmium and lead were used as adsorbate in both single- and binary-component
systems. In the single-component system, it was found that both metals can be...[
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In the present study, non-metallic fractions recycled from waste printed circuit boards were
activated by potassium hydroxide as activation agent under certain experimental conditions.
Various techniques were employed to investigate the characteristics of the raw and
activated materials. The results show that the original material has low surface area with
no presence of functional groups on it while the surface area of the activated material has
been significantly increased with surface functionalized groups.
In order to test the ability of the activated material as adsorbent for the treatment of heavy
metal-loaded effluent, cadmium and lead were used as adsorbate in both single- and binary-component
systems. In the single-component system, it was found that both metals can be
readily adsorbed onto the activated material with high adsorption capacities of 2.1 and 3.2
mmol/g for cadmium and lead, respectively. Binary Pb
2+-Cd
2+ system was used to test the
competitive behavior between the two metals using this material. The results indicate that
the activated material prefers lead to cadmium.
Furthermore, experimental results were fitted to various equilibrium isotherm models for
the single-component system and the Redlich-Peterson has been found out to be the best
fit model. For the binary-component system, extended single-component equilibrium
isotherms were used to predict the experimental data. In addition, nonlinear sum of squared
errors method was used to determine the single-component equilibrium isotherm
parameters and identify the best-fit model.
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