周晓勇;田亚运;张举斌;

• 1:福州大学石油化工学院

摘要(Abstract)：

研究了用水葫芦生物吸附剂从溶液中吸附Cu2+和Zn2+,考察了溶液pH、吸附剂用量、金属离子初始浓度、温度及吸附时间对Cu2+、Zn2+吸附率的影响,探讨了等温吸附、吸附热力学及动力学。结果表明:pH是影响吸附效果的重要因素,pH在2⁶范围内,随pH增大,金属离子去除率升高;水葫芦对Cu2+、Zn2+的吸附速度较快,80min左右即达平衡,吸附过程符合准二级动力学模型(R2>0.999);利用Langmuir等温方程进行拟合,得到水葫芦对Cu2+、Zn2+的最大吸附量分别为26.39和15.11mg/g;吸附热力学参数ΔG<0,表明水葫芦对Cu2+、Zn2+的吸附过程可自发进行;水葫芦经3次吸附解吸循环后,仍然保持较高的吸附性能。水葫芦价格低廉,产量大,在重金属废水处理方面有很好的应用前景。

关键词(KeyWords)： 水葫芦;生物吸附;重金属;动力学

Abstract:

Keywords:

基金项目(Foundation):

作者(Authors): 周晓勇;田亚运;张举斌;

DOI: 10.13355/j.cnki.sfyj.2015.01.16

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