Activated carbon cloth analyses

Abstract Removal of catechol and resorcinol from aqueous solutions by adsorption onto high area activated carbon cloth (ACC) was investigated. Kinetics of adsorption was followed by in-situ uv-spectroscopy and the data were treated according to pseudo-first-order, pseudo-second-order and intraparticle drfiusion models. It was fotmd that the adsorption process of these compotmds onto ACC follows pseudo-second-order model. Furthermore, intraparticle drfiusion is efiective in rate of adsorption processes of these compoimds. Adsorption isotherms were derived at 25°C on the basis of batch analysis. Isotherm data were treated according to Langmuir and Freundhch models. The fits of experimental data to these equations were examined. 

Usually the activated carbon granules are employed for chromium removal or for catalysts preparation. However in some previous reports the perspectives and advantages of activated carbon fibers (ACF) utilization for the same employment have been documented [2,4]. It seems from the analysis of the articles that the use of ACF or activated carbon cloth has a great potential. 

A contemporary study by Jayson et al. [307] does cite the paper by Muller et al. [523] and thus combines electrophoretic measurements on an activated carbon cloth (ACC, pHipp = 2.7) with the analysis of pH effects on uptakes of triethyl and dimethyl (pK = 2.12) phosphates. Table 22 summarizes the Langmuir monolayer capacities obtained in an effort to unravel the controlling mechanisms governing adsorption of these pesticides. While the low values of adsorption heats (<5 kJ/mol) suggested that the ad.sorption process is purely physical... 

Rajakovic, Lj.V., lUc, M.R., Jovanic, P.B., and Radosevic, P.B. (1995). Stoichiometric analysis of chemisorption of hydrogen-cyanide onto activated carbon cloth. Carbon, 33, 1433-41. 

The method of analysis of the uncertainty in the amount of fluid or density in the continuous phase in manometric adsorption measurements, calculated via Peng-Robinson and Bender equations of state is presented. It is applied for the evaluation of the specific surface excess amount and its uncertainty during high-pressure nitrogen adsorption by a microporous activated carbon cloth at pressures up to 17 MPa at 252.40 K. Adsorption data were analysed via the use of bilinear-interpolated data from a P-p-T matrix developed fi-om the NIST Chemistry WebBook fluid physical properties database. Deviations of calculated specific surface excess amounts from those calculated using NIST density data approach 0.2 %, considerably superior to either Peng-Robinson or Bender EoS, ranging from 6.4 to 3.0 %. 

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