干渣吸附去除水溶液中磷素的研究.pdfVIP

Adsorption of Phosphorus from Aqueous Solution on Blast 1 Furnace Slags Zhao Guiyu, Xie Li , Zhou Qi State Key Lab of Pollution Control and Resource Reuse, Tongji University, Shanghai (200092) E-mail ：sally.xieli@ Abstract This paper focus on the adsorption of phosphorus onto blast furnace slags. Its equilibrium isotherm and kinetic model were investigated by using different models. The Langmuir, Freundlich and Temkin isotherms were applied to describe the experimental isotherm data and the results showed that the Langmuir isotherm was the best to characterize the phosphorus adsorption behavior on the blast Q furnace slags with the maximum adsorption capacity m of 1341.6mg/kg. The kinetics studies at different initial phosphorus concentrations showed that greatest amount of phosphorus adsorption were completed during the first 10h. Although the process of phosphorus adsorption as a function of time can be suitably described by first-order and pseudo second-order kinetics, the pseudo second-order kinetics are proved to be the best with the similar qe with the experimental data. Keywords: Phosphorus adsorption, Isotherms, Kinetics ，Blast furnace slags 1. INTRODUCTION Phosphorus is an essential, often limiting nutrient for growth of organisms in most ecosystems. However, excessive supply of phosphorus from wastewater into water bodies, such as lakes, rivers and sea causes eutrophication, resulting in the bloo