الفهرس 
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Abstract
Adsorption has been successfully used to remove a variety of heavy metals ions from wastewater. The goal is to adsorb ions of heavy metals onto the adsorbent.
The aim of the present work is to study the removal of copper ions from waste effluents by adsorption onto granular activated carbon.
The adsorbed amount of copper ions onto granular activated carbon was studied under different conditions by varying the following parameters:
2-1 Effect of adsorbent dosage (O.OS-O.S g).
2-1 Effect of initial copper concentration (l00-400ppm). 2-1 Effect of temperature (2S-6S°C).
2-1 Effect of adsorption time (3-180min).
The study indicated that increasing the amount of granular activated carbon decreased the adsorbed amount (mg/g). Adsorbed amount(mg/g) increased by increasing initial copper concentration till initial concentration of copper 300ppm, further increase initial copper concentration decrease the adsorbed amount (mg/g). It is found the increasing the adsorption time increased the adsorbed amount till adsorption equilibrium take place (approximately 60min). Also found by increasing temperature the amount of adsorbed (mg/g) will decrease.
Adsorption equilibrium data could also be described well by Langmuir, Freundlich, and Dubinin-Radushkevich isotherm models. The freundlich isotherm was found to agree well the exprernintal data.
The results indicate that the maximum adsorbed amount is 120mg/g is achieved after 30 minutes at O.OSg granular activated carbon, initial copper concentration 300ppm and 2S°C.