胺基螯合蔗渣纤维素对模拟废水中Cu2+的吸附

Absorption of Copper Ions by Amino Chelated Bagasse Cellulose in Simulated Heavy Metals Wastewater

中文关键词:  胺基螯合蔗渣纤维素  Cu2+  动力学模型  吸附等温线

Key Words:amino chelated bagasse cellulose  Cu2+  kinetic mode  isotherm

中文摘要:

      从pH值、温度、时间及Cu2+初始质量浓度几个方面研究了自制胺基螯合蔗渣纤维素对模拟的重金属废水中Cu2+吸附性能的影响。实验结果表明，随着pH值、Cu2+初始质量浓度增大，蔗渣纤维素上Cu2+吸附量增大。当吸附25 min后，胺基螯合蔗渣纤维素对Cu2+的吸附基本达到饱和。对Cu2+吸附动力学进行了研究，证明胺基螯合蔗渣纤维素对Cu2+的吸附结果符合Lagrange二级动力学模型。绘制胺基螯合蔗渣纤维素的吸附等温线，利用Langmuir和Freundlich等温吸附方程对实验数据进行拟合，证明胺基螯合蔗渣纤维素对Cu2+的吸附较符合Langmuir吸附等温线。

Abstract:

      The effects of pH, temperature, absorption time and the initial concentration of Cu2+ on the absorption of Cu2+ by the amino chelated bagasse cellulose which was prepared in advance in simulated heavy metals wastewater were investigated. Experimental results showed that the adsorbance of Cu2+ by amino chelated bagasse cellulose increased with the increase of the value of pH or the initial concentration of Cu2+. After 25 min of absorption, adsorption of Cu2+ almost was saturated. Study of absorption kinetics of Cu2+ indicated that amino chelated cellulose absorption of Cu2+ was in line with the Pseudo-second-order Kinetic model. The equilibrium data was tested with Langmuir and Freundlich isotherm equations. Langmuir isotherm was proved to be more suitable for the description of adsorption of Cu2+ by amino chelated bagasse cellulose.