《Table 2.Parameters of the estimated kinetic model (power function model) for arsenic adsorption on

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《"Synthesis, characterization, and property test of crystalline polyferric sulfate adsorbent used in treatment of contaminated water with a high As(Ⅲ) content"》

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where q is the adsorbed As（μg/g）at time t（min），and a and b are constants.The parameters of the model on the three samples are summarized in Table 2.Based on the R2 values（>0.95），the kinetics of As adsorption on the three samples could be described by the model equation.The higher value of a in the power function equation suggested the higher adsorbed amount of adsorbate with time.A similar type of inference on the well-fitted kinetic model of As adsorption was drawn by Mukhopadhyay et al.[27]using Ti-pillared smectite，Fe-exchanged smectite，unmodified smectite，phosphate-bound kaolinite，and unmodified kaolinite.