Effect of temperature and ph on the adsorption of an anionic detergent on activated carbon Article uri icon

abstract

  • Adsorption of an anionic detergent (sodium dodecyl benzene sulfonate) from aqueous solutions onto activated carbon is investigated as an alternative for eliminating detergents from wastewaters. The adsorption isotherm was measured experimentally at 25°C, 30°C and 35°C and the experimental data were correlated reasonably well by the adsorption isotherm of Prausnitz‐Radke. The adsorption capacity is considerably affected by pH and there exists an optimal pH, near pH = 7, where the maximum adsorption takes place. The adsorption capacity increases with rising temperature, the adsorption is irreversible and the heat of adsorption is lessened with the amount of detergent adsorbed and its order of magnitude corresponds to a chemical reaction. It is concluded that the detergent is chemically adsorbed onto the activated carbon. Copyright © 1989 Society of Chemical Industry

publication date

  • 1989-01-01