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Comparison of adsorption behaviors of sulfated CNCs (SCNS) and carboxylated CNCs; (a) pH dependency of CNC adsorption on Cd2+; (b) plot of t/qt (where qt (mg/g) is the amount of metal adsorbed at time (t) as a function of time). The linearity of SCNCs correspond to a good fit by the pseudo second order kinetic model. CNCs: Sulfated CNCs; SCNCs: Carboxylated CNC after reaction with succinic anhydride. Adapted with permission from [42].
