National Center of Excellence in Physical Chemistry, University of Peshawar, Peshawar 25120, Pakistan.
J Hazard Mater. 2009 Dec 15;172(1):124-8. doi: 10.1016/j.jhazmat.2009.06.155. Epub 2009 Jul 4.
Batch adsorption technique was used to study the adsorption of cobalt on NiO. The aim of this work was to examine the effect of pH, concentration and temperature on the ion exchange removal of Co2+ from aqueous solution by the NiO surface. We used Langmuir model to interpret the adsorption data. The Kurbatov-type plots were tested to determine the adsorption mechanism. The kinetics of Co2+ adsorption on NiO was best described by film diffusion model. A well-known thermodynamic equation was used to assess the enthalpy and entropy of the system. The thermodynamic data were indicative of the spontaneous nature of the endothermic sorption process of Co2+ onto the NiO.
采用批吸附技术研究了钴在 NiO 上的吸附。本工作的目的是考察 pH 值、浓度和温度对 NiO 表面从水溶液中离子交换去除 Co2+的影响。我们使用 Langmuir 模型来解释吸附数据。通过 Kurbatov 型图来确定吸附机制。NiO 上 Co2+吸附的动力学最符合膜扩散模型。使用一个著名的热力学方程来评估系统的焓和熵。热力学数据表明 Co2+吸附到 NiO 上是一个自发的吸热吸附过程。
