A one-pot kinetic uptake study of urea in aqueous solution with various chitosan sorbent materials such
as pristine chitosan, cross-linked chitosan with glutaraldehyde from low (C-1) to higher (C-2) glutaraldehyde
content, and a Cu(II) complex of a glutaraldehyde cross-linked chitosan material (C-3) is reported
herein.The kinetic uptake profiles were analyzed by the pseudo-first order (PFO) and pseudo-secondorder
(PSO) models, respectively.The uptake rate constant of urea and the sorption capacity (qe) of high
molecular weight (HMW) chitosan, C-1, C-2, and C-3 were best described by the PFO model.