Electronic Resource
Experimental energy barriers to anions transporting through nanofiltration membranes
| العنوان: | Experimental energy barriers to anions transporting through nanofiltration membranes |
|---|---|
| المؤلفون: | Richards, Laura A., Richards, Bryce, Corry, Ben, Schafer, Andrea I. |
| المصدر: | Environmental Science and Technology |
| بيانات النشر: | American Chemical Society 2013 |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | Environmentally relevant contaminants fluoride, chloride, nitrate, and nitrite face Arrhenius energy barriers during transport through nanofiltration (NF) membranes. The energy barriers were quantified using crossflow filtration experiments and were in the range of 7-17 kcal·mol-1, according to ion type and membrane type (Filmtec NF90 and NF270). Fluoride faced a comparatively high energy barrier for both membranes. This can be explained by the strong hydration energy of fluoride rather than other ion properties such as bare ion radius, fully hydrated radius, Stokes radius, diffusion coefficient, or ion charge. The energy barrier for fluoride decreased with pressure, indicating an impact of directional force on energy barriers. The influence of temperature-induced pore radius variability and viscosity on energy barriers was considered. The novel link between energy barriers and ion properties emphasizes the importance of ion hydration and/or partial dehydration mechanisms in determining transport in NF. |
| مصطلحات الفهرس: | Keywords: Arrhenius energies; Cross flow filtration; Directional forces; High-energy barriers; Hydrated radius; Hydration energies; Ion charge; Ion hydration; Ion radii; Ion types; Ion-properties; Membrane types; Partial dehydrations; Pore radius; Stokes radius; Te, Journal article |
| URL: | |
| الاتاحة: | Open access content. Open access content |
| Other Numbers: | AUANP oai:openresearch-repository.anu.edu.au:1885/70933 0013-936X 1291798327 |
| المصدر المساهم: | AUSTRALIAN NAT UNIV - PRINT REPOSITORY From OAIster®, provided by the OCLC Cooperative. |
| رقم الانضمام: | edsoai.on1291798327 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |