Temperature dependence of trihalomethane adsorption on activated carbon: implications for systems with seasonal variations in temperature and concentration

Sorption equilibrium isotherms for volatile organics in aqueous solution. Comparison of head-space gas chromatography and on-line UV stirred cell results

“…The normalized volumetric sorption and Polanyi potential theory isotherms presented do not necessarily represent "universal" plots for sorption onto XAD4 and Browne and Cohen (1990) and (2) Alben et al (1988).…”

“…Often, parameters for the Freundlich isotherm (Noll et al, 1992; Alben et al, 1988), the Dubinin isotherm (Weber and van Vliet, 1981a,b), the Langmuir isotherm, and the Polanyi potential theory (Sontheimer et al, 1988) are calculated to characterize the sorbate/sorbent systems. The above isotherm parameters provide information about sorbate/sorbent interactions and maximum solute capacity of the adsorbent, and were considered in analysis of the current results.…”

Activated carbon adsorption of phenolics in oxic systems: Effect of pH and temperature variations

“…Since adsorption is an exothermic process, lower temperatures should yield higher adsorption capacities. This fact was supported by the findings of Maqsood and Benedek (1977) and Alben et al (1978). These studies failed to recognize the interaction of dissolved oxygen with the adsorbates and the carbon, and very often isotherm capacities had to be modified to match column adsorption capacities (Crittenden and Weber, 1978;Resche et al, 1986).…”

Project Work Plan Carbon Tetrachloride and Chloroform Attenuation Parameter Studies: Heterogeneous Hydrolytic Reactions

“…Sorption energies for chlorinated hydrocarbons (trichloroethene and chloroform) onto organic surfaces have been estimated to be about 33 kJ mol-1 (Alben et al 1988). If we assume a value of 33 kJ mol-1 as the sorption energy for carbon tetrachloride and assume further that this energy decreases the activation energy for hydrolysis by the same amount (i.e., from 113 kJ mol-1 to 80 kJ mol-1), we can calculate the rate constant for heterogeneous sorption using the Arrhenius expression.…”