林产化学与工业
林產化學與工業
림산화학여공업
CHEMISTRY AND INDUSTRY OF FOREST PRODUCTS
2014年
6期
8-12
,共5页
木质素阳离子表面活性剂%有机硅藻土%聚乙酸乙烯酯( PVAc)%吸附
木質素暘離子錶麵活性劑%有機硅藻土%聚乙痠乙烯酯( PVAc)%吸附
목질소양리자표면활성제%유궤규조토%취을산을희지( PVAc)%흡부
lignin-cation surfactant%organic kieselguhr%polyvinyl acetate(PVAc)%adsorption
以木质素阳离子表面活性剂为改性剂制备有机改性硅藻土,并研究其对溶解和胶体性物质( DCS)模型物聚乙酸乙烯酯( PVAc)的吸附效果。主要探讨了PVAc质量浓度、吸附时间、吸附温度对吸附效果的影响,并在此基础上进一步推算得到了吸附过程的动力学和热力学参数：动力学模型相关系数R2均高于0.99；热力学参数ΔS=-61.39 J/mol,ΔH=-12.03 KJ/mol。实验发现,有机改性硅藻土对PVAc有良好的吸附效果,符合Langmuir吸附模型,升高温度可以增强PVAc在有机硅藻土上的吸附性能,对吸附过程的进行有促进作用；该吸附过程符合伪二阶动力学模型,属于物理吸附过程。
以木質素暘離子錶麵活性劑為改性劑製備有機改性硅藻土,併研究其對溶解和膠體性物質( DCS)模型物聚乙痠乙烯酯( PVAc)的吸附效果。主要探討瞭PVAc質量濃度、吸附時間、吸附溫度對吸附效果的影響,併在此基礎上進一步推算得到瞭吸附過程的動力學和熱力學參數：動力學模型相關繫數R2均高于0.99；熱力學參數ΔS=-61.39 J/mol,ΔH=-12.03 KJ/mol。實驗髮現,有機改性硅藻土對PVAc有良好的吸附效果,符閤Langmuir吸附模型,升高溫度可以增彊PVAc在有機硅藻土上的吸附性能,對吸附過程的進行有促進作用；該吸附過程符閤偽二階動力學模型,屬于物理吸附過程。
이목질소양리자표면활성제위개성제제비유궤개성규조토,병연구기대용해화효체성물질( DCS)모형물취을산을희지( PVAc)적흡부효과。주요탐토료PVAc질량농도、흡부시간、흡부온도대흡부효과적영향,병재차기출상진일보추산득도료흡부과정적동역학화열역학삼수：동역학모형상관계수R2균고우0.99；열역학삼수ΔS=-61.39 J/mol,ΔH=-12.03 KJ/mol。실험발현,유궤개성규조토대PVAc유량호적흡부효과,부합Langmuir흡부모형,승고온도가이증강PVAc재유궤규조토상적흡부성능,대흡부과정적진행유촉진작용；해흡부과정부합위이계동역학모형,속우물리흡부과정。
The kieselguhr was modified by lignin-based cationic surfactant which was obtained from the Mannich reaction. Modified organic kieselguhr exhibited an excellent adsorption of dissolved and colloidal substances ( DCS ) . In this paper, polyvinylacetate ( PVAc ) was chosen as the simulacrum of stickies. The effects of PVAc dosages, adsorption time and temperature on adsorption were discussed. Meanwhile, kinetic and thermodynamic parameters were obtained. Correlation coefficient of kinetic model, R2 were all beyond 0. 99; the thermodynamic parameters ΔS, ΔH were -61. 39 J/mol and-12. 03 kJ/mol, respectively. The adsorption of PVAc on organic kieselguhr matched with the Langmuir model. The higher temperature was positive for the adsorption process. The adsorption process obeyed the pseudo-second-order kinetic model, and belonged to physical type.
