Papers – Page 14 – TechConnect Briefs

Testing a Geochemical Tool to Enhance Our Ability to Ensure Water Security

Slade A.T., Whitehead B.P., The University of Auckland, NZ

Chemicals that are transported in our water can be used to our advantage. Both natural and anthropogenic chemicals can be targeted to understand the way our water behaves. The use of boron isotope compositions has [...]

Dairy CAFO Wastewater, Water Harvesting and Ammonia Fuel Cells

Collins C., Hughes S., Jackson G., Spiralcat of Maryland, US

Spiralcat of Maryland has two pilot demonstration: A Dairy CAFO located within the Chesapeake Bay Watershed brings together precision agriculture and targeted air quality strategies while conserving water, and removing unwanted salts and excess nutrients [...]

Preparation and characterization of polyaniline nanofiber and nanocomposites and their applications in removal of Cr(VI) and phosphate

Najim T.S., Mustansiriya University, IQ

Polyaniline (PAN) nanofibers have received much attention owing to their superior properties compared to the conventional bulk PAN[1-3]. PAN nanofibers show enhanced water processability[4] and improved sensitivity and time response when they are exposed to [...]

Computer modeling of water and salt transport in RO membrane active layers

Pitera J.W., Na Y.-H., Vora A., Dubois G., IBM Research, US

As part of a combined computational and experimental effort to develop new reverse osmosis desalination membrane materials, we have carried out detailed equilibrium and nonequilibrium molecular dynamics simulations of the aromatic polyamide active layers of [...]

Enhanced RO Performance of Polyamide Bi-layer Membranes Prepared by Sequential Interfacial Polymerization

Na Y.-H., Nassar M., Diep J., Davis B., Vora A., Dubois G., Al-Rasheed R., Nassar M., Geise G., Freeman B., IBM Almaden Research Center, US

We have developed polyamide bi-layer thin film composite membranes to enhance RO-desalination performance. The polyamide bi-lyer membrane consists of conventional non-substituted aromatic polyamide under-layer and HFA-substituted aromatic polyamide top-layer, which can be esaily prepared by [...]

CNT-polyamide nanocomposite membranes for gas and water separations

Marand E., Surapathi A., Chan W.F., Chen D., Chen H., Chen D., Chen H., Shao X., Johnson J.K., Virginia Polytechnic Institute and State University, US

We have developed asymmetric carbon nanotube/polyamide membranes for desalination applications. The carbon nanotubes are functionalized with zwitterionic groups that control the rejection of anionic species, while permitting the transport of water. Water flux measurements demonstrate [...]

Advanced RO Membrane Technology Based on Scientific Research for Seawater and Brackish water Desalination

Kimura M., Sasaki T., Henmi M., Toray Industries,Inc., JP

RO membrane technologies have made great progress in last 50 years. In seawater and brackish water desalination field, both energy saving and water quality improvement have been two major subjects. Advanced membranes are still demanded [...]

Sulfated chitosan (SCS)/polysulfone (PS) composite nanofiltration membrane surface cross-linked by Epichlorohydrin

Miao J., Xie Z.H., Chen G.H., Edith Cowan University, AU

A series of composite nanofiltration membranes were prepared via a method of coating and cross-linking from sulfated chitosan (SCS) as the material of the active layer, Polysulfone (PS) UF membrane as the base membrane, and [...]

Structural and Thermo-Mechanical Characterization of Calcium and Barium Alginate Films

Vidal-Urquiza T.K., University of Puerto Rico, PR

Alignate films require its precise characterization of mechanical and thermo-mechanial properties, which are useful for several potential applications in environmental protection, biotechnology, and others areas. Therefore, this work study the aforementioned film properties of sodium [...]

Sodium Clusters for a Superior Light Source

Gokturk H., Ecoken, US

Sodium lamp is one of the most efficient light sources providing an output of 150-200 lumens/watt; for comparison, light output of a fluorescent lamp is about 60-100 lumens/watt. Despite its efficient operation, sodium lamp is [...]