正渗透技术以其低能耗高效率等特点在分离领域有广泛的应用前景,而驱动液的缓慢发展限制了该技术的进一步应用.传统的无机盐驱动溶质如NaCl等在正渗透过程中会产生严重的浓差极化现象和驱动溶质流失,导致驱动效率下降和溶质损失.针对上述问题现以氯化钠为参考,考察了乙二胺及乙二胺四乙酸有机盐作为正渗透驱动溶质对水通量和盐损失的影响.以商业HTI正渗透膜为评价介质,驱动溶质为0.5 mol/L时,EDTA盐,EDA和NaCl盐的水通量分别为14.5、12.8、12.5 L/(m2·h),它们对应的特性溶质逆向扩散值(Js/Jw)分别为0.3、1.1、1.0 g/L.结果表明EDTA盐作为正渗透驱动溶质时可提高正渗透过程的水通量并可显著的降低驱动溶质流失,说明该类物质有作为正渗透驱动溶质的发展前景.
参考文献
| [1] | Cath TY;Childress AE;Elimelech M .Forward osmosis: Principles, applications, and recent developments[J].Journal of Membrane Science,2006(1/2):70-87. |
| [2] | Petrotos K B;Quantick P C;Petropakis H .Direct osmotic concentration of tomato juice in tubular membrane module configuration.Ⅱ.The effect of using clarified tomato juice on the process performance[J].Journal of Membrane Science,1999,160:171-177. |
| [3] | ROBERT L. McGINNIS;MENACHEM ELIMELECH .Global Challenges in Energy and Water Supply: The Promise of Engineered Osmosis[J].Environmental Science & Technology: ES&T,2008(23):8625-8629. |
| [4] | 李刚;李雪梅;何涛 .正渗透技术及其应用[J].化工进展,2009,21(02):16-20. |
| [5] | 李刚,李雪梅,柳越,王铎,何涛,高从堦.正渗透原理及浓差极化现象[J].化学进展,2010(05):812-821. |
| [6] | Frank B S .Desalination of sea water[P].US Pat:3670897,1972. |
| [7] | Phuntsho S;Shon H K;Hong S et al.A novel low energy fertilizer driven forward osmosis desalination for direct fertigation:Evaluating the performance of fertilizer draw solutions[J].Journal of Membrane Science,2011,375(1-2):172-181. |
| [8] | Jeffrey R.McCutcheon;Robert L.McGinnis;Menachem Elimelech .A novel ammonia-carbon dioxide forward(direct)osmosis desalination process[J].Desalination: The International Journal on the Science and Technology of Desalting and Water Purification,2005(1):1-11. |
| [9] | WILLIAM A. PHILLIP;JUI SHAN YONG;MBNACHEM ELIMELBCH .Reverse Draw Solute Permeation in Forward Osmosis: Modeling and Experiments[J].Environmental Science & Technology: ES&T,2010(13):5170-5176. |
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%