Kinetics of hydrophobic organic contaminant extraction from sediment by granular activated carbon

2014 ◽  
Vol 51 ◽  
pp. 86-95 ◽  
Author(s):  
M.I. Rakowska ◽  
D. Kupryianchyk ◽  
M.P.J. Smit ◽  
A.A. Koelmans ◽  
J.T.C. Grotenhuis ◽  
...  
2014 ◽  
Vol 57 ◽  
pp. 339 ◽  
Author(s):  
M.I. Rakowska ◽  
D. Kupryianchyk ◽  
M.P.J. Smit ◽  
A.A. Koelmans ◽  
J.T.C. Grotenhuis ◽  
...  

2006 ◽  
Vol 71 (8-9) ◽  
pp. 957-967 ◽  
Author(s):  
Ljiljana Markovska ◽  
Vera Meshko ◽  
Mirko Marinkovski

The isotherms and kinetics of zinc adsorption from aqueous solution onto granular activated carbon (GAC) and natural zeolite were studied using an agitated batch adsorber. The maximum adsorption capacities of GAC and natural zeolite towards zinc(II) from Langmuir adsorption isotherms were determined using experimental adsorption equilibrium data. The homogeneous solid diffusion model (HSD-model) combined with external mass transfer resistance was applied to fit the experimental kinetic data. The kinetics simulation study was performed using a computer program based on the proposed mathematical model and developed using gPROMS. As the two-mass transfer resistance approach was applied, two model parameters were fitted during the simulation study. External mass transfer and solid phase diffusion coefficients were obtained to predict the kinetic curves for varying initial Zn(II) concentration at constant agitation speed and constant adsorbent mass. For any particular Zn(II) - adsorbent system, k f was constant, except for the lowest initial concentration, while D s was found to increase with increasing initial Zn(II) concentration.


2008 ◽  
Vol 42 (7) ◽  
pp. 2606-2611 ◽  
Author(s):  
Priscilla C. To ◽  
Benito J. Mariñas ◽  
Vernon L. Snoeyink ◽  
Wun Jern Ng

2015 ◽  
Vol 22 (1) ◽  
pp. 95-105 ◽  
Author(s):  
Krzysztof Kuśmierek ◽  
Andrzej Świątkowski

Abstract Adsorptive removal of 2-, 3- and 4-chlorophenol from aqueous solutions by granular activated carbon was studied. The influence of different experimental parameters like initial concentration, carbon dosage and pH on the adsorption of monochlorophenols were evaluated. The influence of type of acid and base used for water acidification or alkalization was also tested. The results indicate that acidic pH is favorable for the adsorption of chlorophenols; however the type of acid or alkali used for the change of pH has a little influence and did not significantly affect the adsorption efficiency. The pH played an important role in the adsorption kinetics of chlorophenols at pH values above the pKa values of the compounds, while little influence on adsorption rate was observed if pH was decreased below the pKa values


2013 ◽  
Vol 1 (3) ◽  
pp. 496-503 ◽  
Author(s):  
Kumar Djamel Belaid ◽  
Smaïl Kacha ◽  
Mostefa Kameche ◽  
Zoubir Derriche

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