Characterization of thermostructural damages observed in a seaweed used for biosorption of cadmium: effects on the kinetics and uptake.
The effect of drying Sargassum filipendula on the kinetics and uptake of cadmium was studied. The maximum uptake was not reduced when ovendried biomass was used for cadmium concentrations from 10.0 to 500.0 mg/L. Kinetics indicated better performance of the in natura biomass. Drying at 333 K affected the uptake capacity. Results fit the Langmuir model better than the Freundlich. This process followed pseudo-second-order kinetics. Thermogravimetric and infrared analysis confirmed that no structural damage occurred after drying, and no differences between the biomasses were observed. Temperatures from 303 to 328 K affected cadmium uptake capacity.
da Costa
Antonio Carlos Augusto
AC
Programa de Pós-Graduação em Engenharia Química, Universidade do Estado do Rio de Janeiro, R. S. Francisco Xavier 524, Sala 427, Maracanã, 20550-013, Rio de Janeiro RJ, Brasil. acosta@uerj.br
Luna
Aderval S
AS
Pafumé
Robson
R
D000042:Absorption; D001673:Biodegradation, Environmental; D002104:Cadmium / Q000302:isolation & purification* / Q000378:metabolism*; D003198:Computer Simulation; D003890:Desiccation / Q000379:methods*; D007700:Kinetics; D008657:Metabolic Clearance Rate; D008954:Models, Biological; D012624:Seaweed / Q000166:cytology* / Q000378:metabolism*; D013696:Temperature; D014867:Water
D002104:Cadmium; D014867:Water