title: Adsorption of methylene blue dye from aqueous solutions using Eichhornia crassipes.
abstract: Adsorption of methylene blue (MB) from aqueous solution using dried roots, stems, and leaves of Eichhornia crassipes biomass obtained from Lake Victoria was studied. Batch experimental results revealed that the adsorption process was highly dependent on adsorbent dosage, initial MB concentration, E. crassipes particle size and aqueous solution temperature. The isotherm data fitted Freundlich mathematical models with maximum dye adsorption of 35.37 mg g(-1). Roots adsorbed over 99 % of the MB in <5 min. Sorption kinetics followed a pseudo-second-order model. Results provide evidence that E. crassipes is an effective and inexpensive biomaterial for dye removal from aqueous dye solutions and industrial effluents.
authors.affiliation: Department of Chemistry, School of Physical Sciences, University of Nairobi, P.O Box 30197-00100, Nairobi, Kenya. wchisutia@yahoo.com
authors.forename: Wycliffe Chisutia
authors.initials: WC
authors.lastname: Wanyonyi
authors.forename: John Mmari
authors.initials: JM
authors.lastname: Onyari
authors.forename: Paul Mwanza
authors.initials: PM
authors.lastname: Shiundu
mesh_terms: D000327:Adsorption; D001673:Biodegradation, Environmental; D004396:Coloring Agents / Q000378:metabolism*; D003890:Desiccation; D031806:Eichhornia; D052918:Environmental Restoration and Remediation / Q000379:methods*; D058865:Introduced Species; D007630:Kenya; D060106:Lakes; D008751:Methylene Blue / Q000378:metabolism*; D018515:Plant Leaves / Q000378:metabolism; D018517:Plant Roots / Q000378:metabolism; D018547:Plant Stems / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D004396:Coloring Agents; D014874:Water Pollutants, Chemical; D008751:Methylene Blue