Kinetic, isotherm and thermodynamic studies of amaranth dye biosorption from aqueous solution onto water hyacinth leaves.
The present study explored the kinetics, equilibrium and thermodynamics of amaranth (acid red 27) anionic dye (AD) biosorption to water hyacinth leaves (LEC). The effect of LEC particle size, contact time, solution pH, initial AD concentration and temperature on AD biosorption was studied in batch experiments. AD biosorption increased with rising contact time and initial AD concentration, and with decreasing LEC particle size and solution pH. Pseudo-second-order chemical reaction kinetics provided the best correlation for the experimental data. Isotherm studies showed that the biosorption of AD onto LEC closely follows the Langmuir isotherm, with a maximum biosorption capacity of about 70 mg g(-1). The thermodynamic parameters confirm that AD biosorption by LEC is non-spontaneous and endothermic in nature. Results indicate that LEC is a strong biosorbent capable of effective detoxification of AD-laden wastewaters.
['Guerrero-Coronilla|Imelda|I|', 'Morales-Barrera|Liliana|L|', 'Cristiani-Urbina|Eliseo|E|']
D000327:Adsorption D000548:Amaranth Dye D001391:Azo Compounds D004396:Coloring Agents D031806:Eichhornia D006863:Hydrogen-Ion Concentration D007700:Kinetics D010316:Particle Size D018515:Plant Leaves D013816:Thermodynamics D014865:Waste Disposal, Fluid
Kinetics Isotherm Thermodynamics Amaranth dye Biosorption Water hyacinth leaves