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

• 来源期刊: 中国科学B辑（英文版）
• 年，卷（期）: 2008,（6）
• 页码范围: 586-592
• 页数: 7页
• 语种: 英文
• DOI: 10.1007/s11426-007-0111-z

摘要

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 in-fluence 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. (σε/Vs) are collapsed to a single correlation curve for different adsorbates on hypercrosslinked polymeric resin.