改进了切向流动电位测试技术.由运动方程出发推导了流道高度的理论计算式.利用DL膜测量了流动电位,通道高度以及系统中各部分的电导,深入研究了流道高度、系统的各部分电导以及压降和浓度对Zeta电位的影响.结果表明,所提出的流道高度测定方法,并以总电导代替流道电导和溶液电导,大大提高了Zeta电位测定结果的准确性.在测量范围内,压降对Zeta电位几乎没有影响,而浓度对Zeta电位及各部分的电导影响很大.随浓度的增大,Zeta电位的绝对值下降.在低浓度时,膜电导所占比例大于溶液电导和外回路电导.随溶液浓度增加,膜电导所占比例逐渐低于溶液电导.
参考文献
| [1] | 王晓琳;丁宁.反渗透和纳滤技术与应用[M].北京:化学工业出版社,2005 |
| [2] | Mockel D.;Dal-Cin M.;Darcovich K.;Guiver M.;Staude E. .Tangential flow streaming potential measurements: Hydrodynamic cell characterization and zeta potentials of carboxylated polysulfone membranes[J].Journal of Membrane Science,1998(2):211-222. |
| [3] | 顾惕人;朱步瑶;李外郎.表面化学[M].北京:科学出版社,1994 |
| [4] | Hunter R J.Zeta Potential in Colloid Science[M].Aeademic Press,London,1981 |
| [5] | Kkiahara A;Watanabe A;邓彤;赵学范.界面电现象[M].北京:北京大学出版社,1992 |
| [6] | K.J. Kim;A.G. Fane;M. Nystrom;A. Pihlajamaki;W.R. Bowen;H. Mukhtar .Evaluation of electroosmosis and streaming potential for measurement of electric charges of polymeric membranes[J].Journal of Membrane Science,1996(2):149-159. |
| [7] | Szymczyk A;Fatin-Rouge N;Fievet P .Tangential streaming potential as a tool in modeling of ion transport through nanoporous membranes[J].Journal of Colloid and Interface Science,2007(2):245-252. |
| [8] | Szymczyk A.;Mullet M.;Reggiani JC.;Pagetti J.;Fievet P. .Comparison of two electrokinetic methods - electroosmosis and streaming potential - to determine the zeta-potential of plane ceramic membranes[J].Journal of Membrane Science,1998(1/2):189-195. |
| [9] | Pontie M;Diawara C K;Rumeau M .Streaming effect of single electrolyte mass transfer in nanofiltration:potential application for the selective defluorination of brackish drinking waters[J].Desalination,2003,15 1(03):267-274. |
| [10] | Fairbrother F;Mastins H .Studies in electro-endosmosis[J].Journal of the Chemical Society,1924,125:2319-2330. |
| [11] | Maria Dina Afonso;Georg Hagmeyer;Rolf Gimbel .Streaming potential measurements to assess the variation of nanofiltration membranes surface charge with the concentration of salt solutions[J].Separation and Purification Technology,2001(0):529-541. |
| [12] | Yaroshchuk A.;Ribitsch V. .Role of channel wall conductance in the determination of zeta-potential from electrokinetic measurements[J].Langmuir: The ACS Journal of Surfaces and Colloids,2002(6):2036-2038. |
| [13] | P. Fievet;M. Sbaie;A. Szymczyk;A. Vidonne .Determining the ζ-potential of plane membranes from tangential streaming potential measurements: effect of the membrane body conductance[J].Journal of Membrane Science,2003(1/2):227-236. |
| [14] | 陈涛;张国亮.化工传递过程基础[M].北京:化学工业出版社,2002 |
| [15] | M. J. Ariza;J. Benavente .Streaming potential along the surface of polysulfone membranes: a comparative study between two different experimental systems and determination of electrokinetic and adsorption parameters[J].Journal of Membrane Science,2001(1):119-132. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%