Experimental and Kinetic Study of Mercury Adsorption on Various Activated Carbons in a Fixed-Bed Adsorber
Autor: | J. Lin, Y. Lee, T.C. Ho, J.R. Hopper, N. Kobayashi |
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Rok vydání: | 2004 |
Předmět: |
Chemistry
technology industry and agriculture Thermodynamics chemistry.chemical_element Langmuir adsorption model Sorption Permeation Pollution Isothermal process Mercury (element) symbols.namesake Adsorption Mass transfer symbols Environmental Chemistry Freundlich equation Waste Management and Disposal |
Zdroj: | Environmental Engineering Science. 21:21-27 |
ISSN: | 1557-9018 1092-8758 |
DOI: | 10.1089/109287504322746712 |
Popis: | This study investigated experimentally and theoretically the characteristics of mercury sorption by activated carbons. Experiments were carried out in a fixed-bed mercury sorption facility composed of a mercury permeation tube embedded in an isothermal water bath, a fix-bed adsorber enclosed in a furnace, and an on-line GC for mercury measurements. The proposed sorption model involved the coupling of a kinetic model based on the mechanisms of surface equilibrium and external mass transfer, and a material balance model based on the tank-in-series approach. Three different equilibrium expressions were used in the model, i.e., the Henry's Law, the Langmuir isotherm, and the Freundlich isotherm. In additional to kinetic simulations using the developed model, an equilibrium model was also used to simulate the thermodynamically preferred mercury species under the experimental conditions. The experimental results have indicated that the factors affecting the adsorption efficiency include the type of activated ca... |
Databáze: | OpenAIRE |
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