Adsorption Of Malachite Green From Aqueous Solutions Onto Rice Husks: Kinetic And Equilibrium Studies
View/ Open
Date
2017Author
Muinde, Veronica
Onyari, John M
Wamalwa, Benson M
Wabomba, J.
Type
ArticleLanguage
enMetadata
Show full item recordAbstract
A study was done to evaluate the removal of a cationic dye from simulated waste water onto rice husks (RH). Spectroscopic methods such as FTIR and SEM/EDX were used for adsorbent characterization. Experimental dependency on solution pH, initial dye concentration, agitation speed, adsorbentparticle size, temperature of the solution and contact time was evaluated. The adsorption data was tested using both Langmuir and Freundlich isotherms. The data fitted well into Langmuir isotherm model with a monolayer adsorption capacity of 6.5 mg/g. Further, the separation factor (RL) value was less than unity indicating a favorable adsorption process. Adsorption kinetics was determined using pseudo-first-order, pseudo-second-order and intra-particle diffusion models. The results showed that the adsorption of malachite green onto rice husks followed pseudo-second-order model with a determination coefficient of 0.986. This work has revealed that rice husks have a great potential to sequester cationic dyes from aqueous solutions and therefore it can be utilized to clean contaminated effluents.
URI
https://www.researchgate.net/publication/314444687_Adsorption_of_Malachite_Green_from_Aqueous_Solutions_onto_Rice_Husks_Kinetic_and_Equilibrium_Studieshttp://erepository.uonbi.ac.ke/handle/11295/107103
Citation
Muinde, V. M., et al. "Adsorption of malachite green from aqueous solutions onto rice husks: Kinetic and equilibrium studies." J. Environ. Prot 8 (2017): 215-230.Publisher
University of Nairobi
Rights
Attribution-NonCommercial-NoDerivs 3.0 United StatesUsage Rights
http://creativecommons.org/licenses/by-nc-nd/3.0/us/Collections
The following license files are associated with this item: