Treatment of water loaded with cupric ions by adsorption on Acacia sawdust

The objective of this paper is to study the ability of acacia sawdust to eliminate copper ions by adsorption from water. many experiments were conducted based on physical and chemical variables including: ph,temperature of the solution,initial concentration of copper ions,stirring speed,mass and particle size of acacia sawdust. the results show that the maximum adsorption was observed for a ph value of 3.2. the adsorption capacity seems to be optimized when temperature,load and size of the acacia sawdust and the initial concentration of the solution decrease. the modeling of adsorption isotherms has shown that freundlich and elovich models describe well this process of adsorption. acacia sawdust shows great affinity for copper ions with a heterogeneity factor equal to 0.28 and a maximum capacity of adsorption of 2. gcu2+/gads. the type of adsorption involved in this process is a nonspecific physical adsorption leading to the formation of multilayer.