SOLID-LIQUID INTERFACE PROCESS OF HEAVY METALS IN THE CHANGJIANG ESTUARYKINETICS OF ADSORPTION OF Pb

• 作 者: 庄国顺rrrrrrrrn 陈松rrrrrrrrn 艾宏韬rrrrrrrrn 廖文卓rrrrrrrrn 潘皆再rrrrrrrrn 许爱玉
• 出 处: Acta Oceanologica Sinica
• 发表日期: 1984年04期
• 关键词: constants kinetics explained adsorbed Medium determining adsorbent sedimentation

The adsorption kinetics of Pb, Cu and Cd on hydrous ferrk oxide (HFO) has been approached in tthe simulated environmental conditions of the Changjiang Estuary. The forward adsorption rate constants of different systems under different temperatures have been determined, and the activation energies of the adsorption for Pb and Cu evaluated (Pb=7 kcal/mol, Cu= 11 kcal/mol). The results show that Pb and Cu are strongly adsorbed by HFO; the order of their adsorption rate is found to be Pb≥Cu≥Cd, which follows thte order of their theonody-namic equilibrium constants. It has been demonstrated that the surface exchange-adsorption is the determining step of the solid-liquid interface process. The field investigation results are theoretically explained by the kinetic mechanism.

The adsorption kinetics of Pb, Cu and Cd on hydrous ferrk oxide (HFO) has been approached in t the simulated environmental conditions of the Changjiang Estuary. The forward adsorption rate constants of different systems under different temperatures have determined, and the activation energies of the The results show that Pb and Cu are strongly adsorbed by HFO; the order of their adsorption rate is found to be Pb ≧ Cu ≥ Cd (Pb = 7 kcal / mol, Cu = 11 kcal / mol) , which follows thte order of their theonody-namic equilibrium constants. It has been demonstrated that the surface exchange-adsorption is the determining step of the solid-liquid interface process. The field investigation results are theoretically explained by the kinetic mechanism.