Description of adsorption equilibrium of PAHs on hypercrosslinked polymeric adsorbent using Polanyi potential theory

Autor: Fuqiang Liu, Chao Long, Quanxing Zhang, Hu Dabo, Aimin Li
Rok vydání: 2008
Předmět:
Zdroj: Science in China Series B: Chemistry. 51:586-592
ISSN: 1862-2771
1006-9291
DOI: 10.1007/s11426-007-0111-z
Popis: In this research, static adsorption of three polycyclic aromatic hydrocarbons (PAHs), naphthalene, acenaphthene, and fluorene, from aqueous solutions onto hypercrosslinked polymeric adsorbent within the temperature range of 288–308 K is investigated. Several isotherm equations are correlated with the equilibrium data, and the experimental data is found to fit the Polanyi-Dubinin-Manes model best within the entire range of concentrations, providing evidence that pore-filling is the dominating sorption mechanism for PAHs. The study shows that the molecular size of adsorbates has distinct influence on adsorption capacity of hypercrosslinked polymeric adsorbent for the PAHs; the larger the adsorbate molecular size, the lower the adsorption equilibrium capacity. Based on the Polanyi-Dubinin-Manes model, the molecular size of adsorbates was introduced to adjust the adsorbate molar volume. Plots of qv vs. (σe/Vs) are collapsed to a single correlation curve for different adsorbates on hypercrosslinked polymeric resin.
Databáze: OpenAIRE
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