Adsorption of naphthalene on zeolite from aqueous solution.
Polynuclear aromatic hydrocarbons (PAHs), which are environmental hormones and carcinogens, are viewed as the priority pollutants to deal with by many countries. Most PAHs are hydrophobic with high boiling and melting points and high electrochemical stability, but with low water solubility. Compared with other PAH species, naphthalene has less toxicity and is easily found in the environment. Thus, naphthalene is usually adopted as a model compound to examine the environmental and health aspects of PAHs. This study attempted to use an adsorption process to remove naphthalene from a water environment. The adsorption equilibrium of naphthalene on zeolite from water-butanol solution, which is a surfactant-enriched scrubbing liquid, was successfully evaluated by Langmuir, Freundlich, and linear isotherms. Among the tested kinetics models in this study (e.g., pseudo-first-order, pseudo-second-order, and Elovich rate equations), the pseudo-second-order equation successfully predicted the adsorption.
Chang
Chiung-Fen
CF
Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan.
Chang
Ching-Yuan
CY
Chen
Ken-Hung
KH
Tsai
Wen-Tien
WT
Shie
Je-Lueng
JL
Chen
Yi-Hung
YH
D000327:Adsorption; D009281:Naphthalenes / Q000737:chemistry* / Q000493:pharmacokinetics; D013499:Surface Properties; D013997:Time Factors; D014867:Water / Q000737:chemistry; D017641:Zeolites / Q000737:chemistry*
D009281:Naphthalenes; D014867:Water; D017641:Zeolites