Isotherm and Kinetics Parametric Studies for Aqueous Hg(II) Uptake onto N-[2-(Methylamino)Ethyl]Ethane-1,2-Diaminated Acrylic Fibre

N-[2-(methylamino)ethyl] ethane-1,2-diaminated acrylic fibre (DAAF) derived adsorbent was prepared by the reaction of acrylic fibre with bis(2-aminoethyl)amine. Fourier transform infrared spectroscopy and scanning electron microscopy were employed for elucidating the surface functional groups and morphology of DAAF, respectively. The influence of several process variables on Hg(II) adsorption was also evaluated. Equilibrium and kinetic studies were conducted using a range of two-parameter models via nonlinear regression methods. Langmuir and pseudo-second-order models emerged the best fit for isotherm and kinetic modelling, respectively. The intraparticle diffusion studies indicate that occurrence of an adsorption process, with multi-mechanistic effect. Similarly, the maximum adsorption capacity (qmax) of 627.5 mg g−1 was recorded in the study at pH 5.0, 30 °C and 15–30 min. The short equilibration time recorded in the study speaks volume of the potential application of DAAF in large-scale Hg(II) adsorption systems.