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Acid Black 172 dye adsorption from aqueous solution by hydroxyapatite as low-cost adsorbent
| Content Provider | Semantic Scholar |
|---|---|
| Author | Ciobanu, Gabriela Harja, Maria Rusu, Lăcrămioara Mocanu, Anca Mihaela Luca, Constantin |
| Copyright Year | 2014 |
| Abstract | The Acid Black 172 dye adsorption on the uncalcined hydroxyapatite nanopowder was investigated. The hydroxyapatite prepared by wet coprecipitation method has high specific surface area of 325 m2/g and crystal sizes smaller than 70 nm. The batch adsorption experiments revealed that under the optimum adsorption conditions (pH 3, hydroxyapatite dosage 2 g/L, initial dye concentration 400 mg/L and temperature 20 °C) the dye removal efficiency was 95.78% after 1 h of adsorption. The adsorption kinetics was best described by the pseudo-second order kinetic model. The intraparticle diffusion model shows that intraparticle diffusion is not the sole rate-limiting step; the mass transfer also influences the adsorption process in its initial period. The Langmuir isotherm model best represented the equilibrium experimental data, and the maximum adsorption capacity (qm) was 312.5 mg/g. |
| Starting Page | 1021 |
| Ending Page | 1027 |
| Page Count | 7 |
| File Format | PDF HTM / HTML |
| DOI | 10.1007/s11814-014-0040-4 |
| Volume Number | 31 |
| Alternate Webpage(s) | https://www.cheric.org/PDF/KJChE/KC31/KC31-6-1021.pdf |
| Alternate Webpage(s) | https://doi.org/10.1007/s11814-014-0040-4 |
| Journal | Korean Journal of Chemical Engineering |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
