Research Article
Study on the Behaviors and Mechanism of Ni(II) Adsorption at the Hydroxyapatite-Water Interface: Effect of Particle Size
Table 2
The Langmuir parameters of Ni(II) sorption/desorption and sorption-desorption hysteresis (HC%) on micro-HAP and nano-HAP.
| Adsorption/desorption system | Langmuir model | HC% | (mg/g) | (mL/g) | |
| Micro-HAP, 298 K | | | | 60.6 | Adsorption | 7.23 | 815.46 | 0.9480 | | Desorption | 12.25 | 695.90 | 0.9728 | | Micro-HAP, 318 K | | | | 75.7 | Adsorption | — | — | — | | Desorption | 24.88 | 259.34 | 0.9736 | | Nano-HAP, 298 K | | | | -71.6 | Adsorption | 23.36 | 180.05 | 0.9883 | | Desorption | 17.94 | 182.66 | 0.9755 | | Nano-HAP, 318 K | | | | -2.0 | Adsorption | — | — | — | | Desorption | 24.90 | 118.94 | 0.9718 | |
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