Study of Kinetics of Copper in Aqueous Solution by Sawdust Adsorbent

Document Type : Research Paper


Assoc. Prof. of Water Eng., College of Agriculture, Shahrekord University, Shahrekord


The purpose of this research was to study the effect of the dosage of sawdust absorbent, on the equilibrium time, the efficiency of absorption in aqueous solution of Copper. Sawdust was prepared and those with particle size of 500 microns was selected. For this  study, four absorbent sawdust concentration of 1 (SD1), 10 g/L (SD10), 20 g/L (SD20) and 50 g/L (SD50) were used. The most absorption rate was occurred at pH6. increasing sorbent the time of absorption at equilibrium condition increases. The maximum balance time of absorbents (SD1, SD10, SD20, and SD50), were, 110, 105, 100 and 80 minutes respectively. Mathematical relationship between mass absorption efficiency absorbent solution and initial concentration showed that although increasing sorbent mass absorption efficiency increases, but if the initial concentration of a certain amount (the amount of crime absorbing capacity) toward to approach zero, the efficiency of all absorbent and rise toward 100% limited to. This concentration toward infinity that applies to e-mail. The calibration results showed that Avram model regression coefficient 0.988 and the error factor 0.037 data better absorption Lagergren models and Ho et al. described.


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