Second-order kinetic model for the sorption of cadmium onto tree fern: a comparison of linear and non-linear methods.
A comparison was made of the linear least-squares method and a trial-and-error non-linear method of the widely used pseudo-second-order kinetic model for the sorption of cadmium onto ground-up tree fern. Four pseudo-second-order kinetic linear equations are discussed. Kinetic parameters obtained from the four kinetic linear equations using the linear method differed but they were the same when using the non-linear method. A type 1 pseudo-second-order linear kinetic model has the highest coefficient of determination. Results show that the non-linear method may be a better way to obtain the desired parameters.
Ho
Yuh-Shan
YS
Department of Environmental Sciences, College of Environmental Sciences, Peking University, Beijing, 100871, People's Republic of China. dr_ysho@hotmail.com
D000042:Absorption; D002104:Cadmium / Q000493:pharmacokinetics*; D004785:Environmental Pollutants / Q000493:pharmacokinetics*; D029624:Ferns / Q000737:chemistry*; D007700:Kinetics; D008962:Models, Theoretical; D014197:Trees
D004785:Environmental Pollutants; D002104:Cadmium