期刊文献+

二次回归正交旋转组合优化麦麸渣吸附铅离子(Pb^(2+)) 被引量:2

Quadratic Rotation-Orthogonal Composite Experimental Design for the Optimization of Experimental Conditions for Pb^(2+) Adsorption by Wheat Bran Dietary Fiber
下载PDF
导出
摘要 采用二次回归正交旋转组合设计方法对麦麸渣吸附Pb^(2+)条件进行优化,建立pH值(X_1)、温度(X_2)、时间(X_3)、质量浓度(X_4)、加入量(X_5)5个因素与吸附率Y的回归模型。在pH8、温度100℃、时间1h、Pb^(2+)质量浓度20mg/L、加入量1.6g/100mL条件下,麦麸渣对Pb^(2+)吸附率最高可达98.91%。麦麸渣对Pb^(2+)的吸附以单分子层的物理吸附为主,Freundlich吸附等温式能较好地描述其吸附热力学情况;麦麸渣对Pb^(2+)吸附先是快速吸附,吸附时间超过60min后为慢速吸附;麦麸渣对低质量浓度Pb^(2+)溶液的吸附效果好于活性炭。 Experimental conditions for the adsorption of Pb2+ by wheat bran dietary fiber (WBDF) were optimized using a quadratic rotation-orthogonal composite experimental design. A regression model for adsorption rate (Y) as function of five independent variables including pH (X1), temperature (X2), time (X3), Pb2+ concentration (X4), and adsorbent dose (X5) was established. Maximum adsorption rate (98.91%) was obtained when 1.6 g/100 mL of WBDF was added to 20 mg/L Pb2+ solution (pH 8) and hold at 100℃ for 1 h. Single molecule layer absorption was dominant during the adsorption process. The adsorption thermodynamics of Pb2+ could be well described using Freundlich isotherm equation. Moreover, the adsorption process was fast in the first 60 min and then slowed down. WBDF had better adsorption efficiency for Pb2+ at low concentrations than activated carbon.
作者 陈莉
出处 《食品科学》 EI CAS CSCD 北大核心 2013年第2期99-104,共6页 Food Science
基金 运城学院院级项目(CY-2012001)
关键词 麦麸渣 铅离子 生物吸附 优化 二次回归正交旋转组合设计 吸附等温线 吸附动力曲线 wheat bran dietary fiber (WBDF) pb2+ bio-adsorption optimization quadratic rotation-orthogonalcomposite experimental design adsorption isotherm~ dynamic adsorption curve
  • 相关文献

参考文献18

二级参考文献117

共引文献649

同被引文献135

引证文献2

二级引证文献8

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部