p. 1−9
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p. 11−18
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p. 19−32
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H3PO4 >NaOH. Kinetically, it was shown that the activation temperature of 450oC is the best temperature for activating the adsorbent carbons. The pseudo-first-order model is appropriate for predicting the adsorption process of Mn(II) onto the P-AC 450oC, P-AC 900oC and OH-AC 900oC, while the pseudo-second-order model is appropriate for predicting the adsorption process of Mn(II) onto the both S-AC 450oC, S-AC 900oC, OH-AC 450oCand OH-AC 900oC. Thermodynamic calculations affirmed that Mn(II) adsorption onto S-AC and P-AC was an endothermic process while onto OH-AC was exothermic process. Finally, the results suggested that the prepared S-AC has high adsorption capacities for Mn(II) compared with other adsorbents, such as P-AC and OH-AC. Therefore, S-AC 450oCcan be used in the groundwater treatment unit.]]>
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Acid Green 25 > Disperse Orange 13. The adsorption process follows the pseudo-second-order kinetics. The rate controlling step is not depending on the intra-particle diffusion. A Freundlich isotherm model could describe the adsorption. The calculated (RL) factor confirmed the variability of the adsorption process.]]>
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