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化工新型材料  2018, Vol. 46 Issue (10): 173-177    
  科学研究 本期目录 | 过刊浏览 | 高级检索 |
聚谷氨酸-聚赖氨酸-单宁酸凝胶吸附Cr(Ⅵ)的机理研究
孙雨1,2,3,李娜1,2,于世云3,张卫3,郝利民4,乔长晟1,2,3*
1.天津科技大学生物工程学院,天津300222;
2.代谢控制发酵技术国家地方联合工程实验室,天津300457;
3.天津北洋百川生物技术有限公司,天津300457;
4.总后军需装备研究所,北京100027
Adsorption mechanism of PGA-PL-tannin gel for efficient removal of Cr(Ⅵ)
Sun Yu1,2,3,Li Na1,2,Yu Shiyun3,Zhang Wei3,Hao Limin4,Qiao Changsheng1,2,3
1.College of Biotechnology,Tianjin University of Science & Technology,Tianjin 300222;
2.National and Local United Engineering Lab of Metabolic Control Fermentation Technology, Tianjin 300457;
3.Tianjin Peiyang Biotrans Biotech Co.,Ltd.,Tianjin 300457;
4.The Quartermaster Institute of the General Logistics Department of P.L.A,Beijing 100027
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摘要 通过批量吸附实验对聚谷氨酸-聚赖氨酸-单宁酸凝胶吸附Cr(Ⅵ)的能力进行研究。结果表明:凝胶吸附Cr(Ⅵ)符合F型等温吸附模型,通过热力学参数研究得出凝胶吸附Cr(Ⅵ)是自发和吸热的过程;动力学研究表明,凝胶吸附Cr(Ⅵ)符合准二动力学模型[kp2=8.264mg/(g·h)]。通过傅里叶变换红外光谱、固态核磁共振碳谱、电感耦合等离子发射光谱仪、X射线光电子能谱分析仪和差示扫描量热仪等手段分别对凝胶进行结构表征。结果表明凝胶含有的带电官能团之间相互作用使Cr(Ⅵ)转化为Cr(Ⅲ)后,通过静电吸附力吸附到凝胶表面。
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孙雨
李娜
于世云
张卫
郝利民
乔长晟
关键词:  γ-聚谷氨酸  ε-聚赖氨酸  单宁酸  Cr(Ⅵ)  吸附机理    
Abstract: A new γ-poly glutamic acid (γ-PGA) based functional gel formed by γ-poly glutamic acid,ε-lysine (ε-PL) and tannin was introduced.The efficacy removal of hexavalent chromium (Cr(Ⅵ)) by the gel was aim at.The gel adsorption conformed to Freundlich adsorption isotherm behavior.The results of thermodynamic parameters indicated that the adsorption of Cr(Ⅵ) by gel was a spontaneous and endothermic process.Kinetic study shown that the adsorption of Cr(Ⅵ) by gel obeyed pseudo-second-order kinetic model.The structure characterization of gel was obtained by FT-IR,13C-NMR,ICP,XPS and DSC.The results showed complexation reaction of the multiple organic functional groups in the gel with Cr(Ⅵ) and Cr(Ⅵ) transformed into Cr(Ⅲ),the electrostatic adsorption promoted the adsorption of Cr(Ⅲ) into the gel.
Key words:  γ-poly glutamic acid    ε-lysine    tannin    Cr (Ⅵ)    adsorption mechanism
                    发布日期:  2018-11-06      期的出版日期:  2018-11-06
基金资助: 天津市科技计划项目(14ZCZDNC00018)
通讯作者:  乔长晟。   
作者简介:  孙雨(1987-),女,硕士研究生,主要研究方向为生物工程。
引用本文:    
孙雨,李娜,于世云,张卫,郝利民,乔长晟. 聚谷氨酸-聚赖氨酸-单宁酸凝胶吸附Cr(Ⅵ)的机理研究[J]. 化工新型材料, 2018, 46(10): 173-177.
Sun Yu,Li Na,Yu Shiyun,Zhang Wei,Hao Limin,Qiao Changsheng. Adsorption mechanism of PGA-PL-tannin gel for efficient removal of Cr(Ⅵ). New Chemical Materials, 2018, 46(10): 173-177.
链接本文:  
http://www.hgxx.org/CN/  或          http://www.hgxx.org/CN/Y2018/V46/I10/173
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