环境保护科学2017，Vol.43Issue(2)：72-76,123,6.DOI:10.16803/j.cnki.issn.1004-6216.2017.02.014
基于响应面法的改性玉米芯吸附水中Zn2+的工艺条件优化及机理研究
Study of the Mechanism Analysis and Process Condition Optimization of Adsorption 2+of Zn onto the Modified Corncob Based on the RSM
姜春红 1赵研 2王鹏3
作者信息
- 1. 沈阳市环境监测中心站,辽宁 沈阳 110169
- 2. 东北大学资源与土木工程学院,辽宁 沈阳 110819
- 3. 辽宁省城市污水处理管理中心,辽宁 沈阳 110161
- 折叠
摘要
Abstract
In this study, corncob was used as biosorbent for removal of Zn2+ from wastewater. Single factor variable control method was used to investigate the influences of corncob quantity, adsorption time, mass concentration of modified NaCl and shanking speed on the adsorption performance. Moreover, response surface methodology was adopted to optimize the adsorption conditions and adsorption mechanism was discussed on the basis of the adsorption isotherms, adsorption kinetics and thermodynamics analysis. The results indicated that when the initial concentration of Zn2+ was 50 mg/L, mass concentration of modified NaCl was 0.26%, corncob quantity was 20 g/L, shaking speed was 203 rpm, adsorption time was 35 min and adsorption temperature was 30 ℃ , the adsorption rate of Zn2+ reached to 80.40%. The adsorption process was a spontaneous process and the adsorption behavior analysis indicated that the process followed Pseudo-second-order model and Langmuir isotherm, with a good application prospect.关键词
玉米芯/锌离子/吸附/响应面/吸附动力学Key words
Corncob/Zinc Ion/Adsorption/Response Surface/Adsorption Kinetic分类
资源环境引用本文复制引用
姜春红,赵研,王鹏..基于响应面法的改性玉米芯吸附水中Zn2+的工艺条件优化及机理研究[J].环境保护科学,2017,43(2):72-76,123,6.
