« Exploring natural resources for sustainable management of ecosystems: future challenges for control and management of Xyleborus fornicatus eichh. (Coleoptera: Scolytidae), the shot-hole borer of tea in Sri Lanka | Home | Heavy metals in substrates of a freshwater wetland at Kelaniyas »
Adsorption kinetics of sugarcane bagasse for selective removal of Cr (VI) and Cu (II) from aqueous solutions
By Dewwanthi Karunarathna | January 18, 2008
The Adsorption Kinetics for the simultaneous and selective removal of Cr(VI) and Cu(II) ions from aqueous mixture was investigated using sugarcane bagasse. Equal volumes of the laboratory prepared metal ion solutions of Cr(VI) and that of Cu(II), having the same initial concentration were mixed and used as test samples. Batch studies were performed at room temperature at three different initial concentrations of each metal ion to be present in the test sample: 10ppm, 30ppm and 50ppm. The available literature for the removal of each of these heavy metal ions when present individually in aqueous solutions was applied in these studies. Accordingly, water washed and sun dried sugarcane bagasse retained on 200 micron-mesh, was used for the study at a dosage of 0.4g/l of the test sample. No attempt was made to maintain a fixed pH as this involved addition of more chemicals adding to more contamination. Instead, the pH and remaining concentrations of the ions in the mixture after adsorption were monitored at various pre-set time intervals till equilibrium condition was attained. The pH of the test samples varied from 7.05 initial values to 8.09 at equilibrium, during all the batch studies. The study has revealed that the adsorbent had higher selectivity to Cu(II) ions in comparison to the Cr(VI) ions at the study conditions. The removal was faster and higher at low initial concentrations. The experimental results fit well with linearized Freundlich Adsorption Isotherm Model.
N Prapurna1 and M Viswanatham2
1Department of Chemical Engineering, CBIT, Hyderabad, India
2 Department of Civil Engineering, JNTUCE, Hyderabad, India
Topics: Pollution control, symposium 2006 | 3 Comments »
February 27th, 2011 at 11:02 pm
please dear can you send me a copy of this article..i like it soo much
May 7th, 2012 at 8:17 pm
thanking you .pls send me whole paper regarding this topic on my mail.
May 7th, 2012 at 9:12 pm
Sorry I think full paper is not published. But full papers of some recent articles are here
http://journals.sjp.ac.lk/index.php/fesympo