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Table 2 Copper removal efficiency at varied contact time

From: Adsorptive Removal of Copper (II) Ions from Aqueous Solution Using a Magnetite Nano-Adsorbent from Mill Scale Waste: Synthesis, Characterization, Adsorption and Kinetic Modelling Studies

Time Removal efficiency
0 0.00 ± 0.00f
5 17.50 ± 0.21e
15 43.04 ± 0.32d
30 48.99 ± 0.23c
60 55.03 ± 0.07b
120 62.31 ± 0.18a
180 62.62 ± 0.01a
240 62.45 ± 0.08a
p value  < .0001
  1. The letters indicate the level of significant and differences in the removal efficiencies of Cu2+