王馨1,
宋小三1,
郑小娟1
1.兰州交通大学环境与市政工程学院，兰州 730070
基金项目: 国家自然科学基金资助项目（51368030）
Comparison between BBD and CCD in response surface methodology to optimize preparation conditions of mercaptoacetyl chitosan
WANG Gang1,,WANG Xin1,
SONG Xiaosan1,
ZHENG Xiaojuan1
1.School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
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摘要:以壳聚糖(CTS)和巯基乙酸为主要原料，通过酰胺化反应将巯基引入到CTS高分子链上，制备出高分子重金属絮凝剂巯基乙酰化壳聚糖（MACTS）。以含Cd(II)水样为考察目标，采用响应曲面法中的BBD和CCD实验对MACTS的制备条件进行优化，从残差分析、方差分析、响应面分析和优化条件等方面对BBD法和CCD法进行比较。结果表明，BBD法和CCD法建立的二次多项式模型回归性分别为显著和非常显著，模型选择均合理；BBD法和CCD法拟合模型的决定系数R2分别为0.871 0、0.919 7,模型相关性均较好；通过BBD法和CCD法优化制备条件后的MACTS处理含Cd(II)水样，Cd(II)的最低剩余浓度分别为0.83、0.76 mg·L-1。在优化MACTS的制备条件上采用CCD法更优于BBD法。
关键词: 响应曲面法/
Box-Behnken设计/
中心复合设计/
高分子絮凝剂/
重金属/
壳聚糖
Abstract:A novel macromolecule heavy metal flocculant, named mercaptoacetyl chitosan (MACTS), was prepared with chitosan (CTS) and mercaptoacetic acid as raw materials by amidation reaction. The water samples containing Cd(II) were investigated to determine the optimal preparation conditions of MACTS through Box-Behnken design (BBD) and central composite design (CCD) of response surface methodology (RSM), and the comparison between BBD and CCD was also discussed in residual analysis, variance analysis, response surface analysis and the optimal conditions of MACTS. The results showed that the regression of the quadratic polynomial model established through BBD and CCD was significant and very significant, respectively, which demonstrated these models were reasonable. The determination coefficient (R2) of the models by using BBD and CCD was 0.871 0 and 0.919 7, respectively, which indicated the models had good agreements with experimental data. Under the preparation conditions of MACTS optimized by BBD and CCD, the residual concentration of Cd(II) in the water samples was 0.83 and 0.76 mg·L-1, respectively. CCD was better than BBD to optimize the preparation conditions of MACTS.
Key words:response surface methodology/
Box-Behnken design/
central composite design/
macromolecule flocculant/
heavy metal/
chitosan.
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响应曲面法中BBD和CCD在优化巯基乙酰化壳聚糖制备条件中的比较
王刚1,,王馨1,
宋小三1,
郑小娟1
1.兰州交通大学环境与市政工程学院，兰州 730070
基金项目: 国家自然科学基金资助项目（51368030）
关键词: 响应曲面法/
Box-Behnken设计/
中心复合设计/
高分子絮凝剂/
重金属/
壳聚糖
摘要:以壳聚糖(CTS)和巯基乙酸为主要原料，通过酰胺化反应将巯基引入到CTS高分子链上，制备出高分子重金属絮凝剂巯基乙酰化壳聚糖（MACTS）。以含Cd(II)水样为考察目标，采用响应曲面法中的BBD和CCD实验对MACTS的制备条件进行优化，从残差分析、方差分析、响应面分析和优化条件等方面对BBD法和CCD法进行比较。结果表明，BBD法和CCD法建立的二次多项式模型回归性分别为显著和非常显著，模型选择均合理；BBD法和CCD法拟合模型的决定系数R2分别为0.871 0、0.919 7,模型相关性均较好；通过BBD法和CCD法优化制备条件后的MACTS处理含Cd(II)水样，Cd(II)的最低剩余浓度分别为0.83、0.76 mg·L-1。在优化MACTS的制备条件上采用CCD法更优于BBD法。
English Abstract
Comparison between BBD and CCD in response surface methodology to optimize preparation conditions of mercaptoacetyl chitosan
WANG Gang1,,WANG Xin1,
SONG Xiaosan1,
ZHENG Xiaojuan1
1.School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
Keywords: response surface methodology/
Box-Behnken design/
central composite design/
macromolecule flocculant/
heavy metal/
chitosan
Abstract:A novel macromolecule heavy metal flocculant, named mercaptoacetyl chitosan (MACTS), was prepared with chitosan (CTS) and mercaptoacetic acid as raw materials by amidation reaction. The water samples containing Cd(II) were investigated to determine the optimal preparation conditions of MACTS through Box-Behnken design (BBD) and central composite design (CCD) of response surface methodology (RSM), and the comparison between BBD and CCD was also discussed in residual analysis, variance analysis, response surface analysis and the optimal conditions of MACTS. The results showed that the regression of the quadratic polynomial model established through BBD and CCD was significant and very significant, respectively, which demonstrated these models were reasonable. The determination coefficient (R2) of the models by using BBD and CCD was 0.871 0 and 0.919 7, respectively, which indicated the models had good agreements with experimental data. Under the preparation conditions of MACTS optimized by BBD and CCD, the residual concentration of Cd(II) in the water samples was 0.83 and 0.76 mg·L-1, respectively. CCD was better than BBD to optimize the preparation conditions of MACTS.
