Adsorption of Methyl Red by water-hyacinth (Eichornia crassipes) biomass.
The surface characteristics and adsorbent properties of biomass, obtained from low-cost and environmentally problematic water hyacinth, were determined. Optimum conditions for the elimination of the industrial dye Methyl Red (1) from aqueous solution were established by means of a batch adsorption technique. The ultimate adsorption capacity of water-hyacinth biomass in terms of the elimination of 1 was calculated from a Langmuir-type isotherm as 8.85x10(-2) mol g(-1) at 30 degrees and at an optimum solution pH of 8.0. Dye elimination was found to be associated with strong electrostatic forces (physisorption), the overall process being slightly endergonic (deltaG>0). Our study shows that water hyacinth has a great potential of removing color from wastewater and other dye-polluted aquatic systems.
Tarawou
Temi
T
Department of Pure and Industrial Chemistry, University of Port Harcourt, Uniport P.O. Box 402, Choba, Port Harcourt, Nigeria.
Horsfall
Michael
M
Vicente
José L
JL
D000327:Adsorption; D001391:Azo Compounds / Q000378:metabolism*; D031806:Eichhornia / Q000378:metabolism*; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*
D001391:Azo Compounds; C008492:methyl red