Cr(VI) Adsorption on Acid Modified Diatomite
Abstract
Cr(VI) adsorption onto diatomite has been investigated. Cr(VI) adsorption effects on original diatomite and acid modified diatomite were compared. The adsorption kinetics of Cr(VI) on acid modified diatomite were described by pseudo-first-order and pseudo-second-order models. The experimental data fit to pseudo-second-order kinetics better. Langmuir and Freundlich isotherms were used as the model adsorption equilibrium data. The thermodynamic parameters were evaluated including ΔG (Gibb’s Free energy change), ΔH (enthalpy change), and ΔS (entropy change).
- Publication:
-
IOP Conference Series: Earth and Environmental Science
- Pub Date:
- May 2019
- DOI:
- 10.1088/1755-1315/267/4/042148
- Bibcode:
- 2019E&ES..267d2148M