Kinetics and model building of leaching of water-soluble compounds of Tilia sapwood

The kinetics of the leaching of water-soluble compounds of Tilia sapwood was investigated. A batch leaching model, based on the assumption of a second-order mechanism for the leaching, was developed to predict the rate constant of leaching, the saturated leaching capacity, and the initial leaching rate with various leaching temperatures. The rate constant is a function of the temperature, and the leaching of water-soluble compounds of Tilia sapwood is an endothermic process. In addition, the activation energy of leaching was also determined based on the second-order rate constants of the leaching. (C) 2005 Elsevier B.V. All rights reserved.