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响应曲面法优化油茶饼对活性红15的生物吸附特征及机理

高景峰 司春英

高景峰, 司春英. 响应曲面法优化油茶饼对活性红15的生物吸附特征及机理[J]. 环境科学研究, 2015, 28(11): 1764-1773.
引用本文: 高景峰, 司春英. 响应曲面法优化油茶饼对活性红15的生物吸附特征及机理[J]. 环境科学研究, 2015, 28(11): 1764-1773.
GAO Jingfeng, SI Chunying. Reactive Red 15 Biosorption on Oil-Tea Cake:Optimization Using Response Surface Methodology and Mechanism[J]. Research of Environmental Sciences, 2015, 28(11): 1764-1773.
Citation: GAO Jingfeng, SI Chunying. Reactive Red 15 Biosorption on Oil-Tea Cake:Optimization Using Response Surface Methodology and Mechanism[J]. Research of Environmental Sciences, 2015, 28(11): 1764-1773.

响应曲面法优化油茶饼对活性红15的生物吸附特征及机理

基金项目: 国家自然科学基金项目(51078007,51378027);北京工业大学京华人才项目(2013-JH-L06)

Reactive Red 15 Biosorption on Oil-Tea Cake:Optimization Using Response Surface Methodology and Mechanism

  • 摘要: 基于“以废治废”的理念,以农林业废弃物——油茶饼为原料制备生物吸附剂,吸附去除废水中的RR15(C.I. Reactive Red 15,活性红15)染料,并采用响应曲面法中的Box-Behnken设计对油茶饼生物吸附剂吸附RR15的条件进行优化. 结果表明:pH对油茶饼生物吸附剂吸附RR15的吸附容量和去除率均有显著影响(P<0.000 1);当pH为1.0、初始ρ(RR15)为300 mg/L、吸附温度为20 ℃时,油茶饼生物吸附剂对RR15的吸附效果最佳. 相比于Langmuir和Freundlich吸附等温线模型,Temkin吸附等温线模型可以更好地描述油茶饼生物吸附剂对RR15的吸附平衡数据. 吸附温度为20 ℃时,由Langmuir吸附等温线模型计算得到的Q0(吸附剂的单层饱和吸附量)为74.63 mg/g. 动力学分析显示,油茶饼生物吸附剂对RR15的吸附过程符合准二级动力学模型(R2>0.999 7),支持了限速步骤是化学吸附的理论;内部扩散和边界层扩散都可能影响吸附速率. 热力学分析表明,该吸附过程是一个自发的放热过程. FTIR(fourier transform infrared spectroscopy,傅里叶变换红外光谱)分析发现,油茶饼生物吸附剂上羟基、胺基等官能团可能是RR15染料的主要结合位点. 研究显示,油茶饼生物吸附剂是一种具有潜力的绿色吸附剂,可以有效去除废水中的RR15染料.

     

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出版历程
  • 收稿日期:  2015-05-19
  • 修回日期:  2015-08-20
  • 刊出日期:  2015-11-25

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