Isotherm study on adsorption removal of Pb (II) by MCM-41 zeolite synthesized from biomass ash
- 10.2991/iccset-14.2015.20How to use a DOI?
- Biomass ash; MCM-41 zeolite; Pb(II) adsorption; Isotherm; Thermodynamics
This paper focuses on the adsorption of Pb(II) from aqueous solution on zeolite that was synthesized from biomass ash. A synthesized MCM-41 zeolite marked as MCM-41-S9 was studied as adsorbent Then, adsorption characterization of Pb(II) onto MCM-41-S9 was discussed. Test results showed that optimum conditions for Pb(II) removal were found to be pH 5 to 6, adsorbent dosage 6 g/L of solution and equilibrium time 2 h. The equilibrium adsorption isotherm can be well described by Langmuir adsorption isotherm model. The adsorption capacity of MCM-41-S9 for Pb(II) ions in terms of monolayer adsorption was 34.33 mg.g?1 at initial concentration of 300 mg.L?1 . MCM-41-S9 was adaptive and efficient to removal Pb(II) in the solutions with lower pH value. The change of entropy (?S0) and enthalpy (?H0) were estimated at 338.5 J.mol?1.K?1) and 96.2 kJ.mol?1 respectively; The negative value of Gibbs free energy (?G0) indicate feasible spontaneous and endothermic adsorption of Pb(II) on MCM-41-S9. The value of the adsorption activation energy (E), calculated using modified pseudo-second-order kinetics model, was -9.06 kJ.mol?1 and testified the reaction was spontaneous, stable and exothermic.
- © 2015, the Authors. Published by Atlantis Press.
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Cite this article
TY - CONF AU - Gang Tan AU - Yongjie Xue AU - Jun Cai PY - 2015/01 DA - 2015/01 TI - Isotherm study on adsorption removal of Pb (II) by MCM-41 zeolite synthesized from biomass ash BT - Proceedings of the 2014 International Conference on Computer Science and Electronic Technology PB - Atlantis Press SP - 91 EP - 96 SN - 2352-538X UR - https://doi.org/10.2991/iccset-14.2015.20 DO - 10.2991/iccset-14.2015.20 ID - Tan2015/01 ER -