>
Fa   |   Ar   |   En
   Study of Multi-Stage Cadmium Adsorption By Riverine Sediments  
   
نویسنده Nasrabadi Mohsen ,Omid Mohammad Hossein ,Mahdavi Mazdeh Ali
منبع Advances In Environmental Technology - 2020 - دوره : 6 - شماره : 4 - صفحه:211 -221
چکیده    Most riverine sediments have the high capability to adsorb and store heavy metal ions. in the present study, the adsorption capacity of the bed sediments collected from the karaj river (iran) were experimentally studied for cadmium ion adsorption. multi-stage batch adsorption experiments were carried out for a constant sediment concentration of 20 g/l and different initial cadmium concentrations of 0.2, 0.5, 1, 10, 20, and 50 mg/l. the cadmium solutions with known concentrations were added to the bed sediment with the mean diameter of 0.53 mm in five stages to characterize the capacity of the sediments to adsorb cadmium. the batch adsorption experiments were conducted as both kinetics and equilibrium. the results showed that by adding cadmium ions to the sediment at each stage, the adsorption capacity was less than the previous stage, and for a cadmium concentration of 0.2 mg/l, the adsorption percent and the amount of adsorbed cadmium was reduced from 88 to 70% and 9 to 6.8 mg/kg, respectively. these changes decreased with increasing initial cd concentrations. this process is useful for seasonal rivers in which a certain concentration of heavy metal pollution may occasionally flow over the bed.
کلیدواژه Multi-Stage Adsorption ,Riverbed Sediments ,Cadmium ,Kinetics
آدرس Arak University, Department Of Water Science And Engineering, Iran, University Of Tehran, Department Of Irrigation And Reclamation Engineering, Iran, Imam Khomeini International University, Department Of Water Engineering, Iran
پست الکترونیکی al.mahdavi@gmail.com
 
     
   
Authors
  
 
 

Copyright 2023
Islamic World Science Citation Center
All Rights Reserved