The performance of sodium lignosulfonate (SL) in industrial applications is strongly related to its adsorption characteristics on surface of solid particles. To study its adsorption mechanisms on TiO2 / water interface, the effect of temperature, pH value, ionic strength and urea on its adsorption equilibrium and kinetics were systematically investigated using residual mass fraction method. The results show that the mechanism of SL adsorption on TiO2/water interface is surface adsorption with mono-molecular layer. Its adsorption rate constant and saturation adsorption capacity increase with rising temperature or lowering pH value, in contrast, the increase of ionic strength and adding urea reduce adsorption rate constant. The main driving force for SL adsorption on TiO2/water interface is considered as synergistic effect of electrostatic and hydrophobic interactions as well as hydrogen bonding, and the hydrophobic interaction can significantly improve its adsorption performance.%木质素磺酸钠在固体表面的吸附特性决定了其应用性能,利用红外和紫外分光光度仪,采用剩余质量分数法研究了温度、pH值、无机盐和氢键破坏剂脲对木质素磺酸钠在TiO2/水界面吸附动力学和等温吸附性能的影响,初步探讨了其在固液界面的吸附作用机理.结果表明,该吸附为单层多点式吸附,随着温度升高和pH值减小,木质素磺酸钠在TiO2/水界面的吸附速率常数和饱和吸附量均增大,而离子强度的增大和脲的加入却使吸附速率常数减小;木质素磺酸钠在TiO2/水界面的吸附驱动力为静电、疏水和氢键作用,疏水作用力可显著增加其吸附量.
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