Water Technologies – Page 18 – TechConnect Briefs

Stability of Aqueous Silica Nanoparticle Dispersions under Subsurface Conditions

Metin C.O., Nguyen Q.P., Lake L.W., The University of Texas at Austin, US

The potential application of nanotechnology has significantly advanced into the upstream oil and gas industry. However, harsh subsurface conditions such as high temperature and saline environment are generally incompatible to most commercially available engineered nanoparticles. [...]

membrane technology in fishery industry: An state of art in nanotechnology

Sriniwas B.D., Sharma R., RTM University of Nagpur, IN

A large amount of raw nanomaterials is processed with the increasing demand of fishery products. Membrane technology and bioprocessing have been increasingly involved in fishery industry, particularly for the treatment of fishery wastes. Fishery nanowastes [...]

Agriculture Industry Sees Green in Wireless Technologies

Ersavas B., Comucicnao, Inc, US

While green is certainly considered good, applying advanced wireless technologies across the agriculture industry’s food chain is great. Bringing mature machine-to-machine (M2M) wireless communications to this broad industry – which includes growers, greenhouses, transporters and [...]

Precipitation, Adsorption and Inhibitory Effects of Nano Copper in Wastewater Activated Sludge

Smeraldi J., Rajagopalan G., Cooper W.J., Hosseini T., Rosso D., University of California Irvine, US

Objective of this study is to compare the fate, removal and inhibitory effects of nanocopper (oxide) with ionic copper in activated sludge. Impacts of functionalization (complexation) of nanocopper as well as the mechanism of nanocopper [...]

Design of a POSS-modified Zeolite Structure and the Study of the Enhancement of Ammonia-nitrogen Removal from Drinking Water

Lin D., Wang D., Zhang Q., You H., Shetty K., Hu L., Harbin Institute of Technology, CN

This research explored the utilization of a waste resource, rice hull ash (RHA), for the synthesis of the polyhedral ologomeric silsesquioxane (POSS) modifier for mesoporous zeolite molecular sieve (ZMS) to enhance NH4+ ion-exchange capacity in [...]

Studies on the kinetic properties of photocatalytic degradation of phenol in water using ZnO nanopowder as a photocatalyst

Tao Y., Cheng Z.L., Ting K.E., Yin X.J., Singapore Polytechnic, SG

In recent years, advanced oxidation processes (AOPs) have been proved to be one of the most effective methods to remove organic pollutants from water and wastewater. These processes are based on the generation of the [...]

Using Zeta Potential to Optimize the Water Clarification Process in a Full-Scale Water Production Facility

Nobbmann U., Gertig K.R., Billica J.A., Morfesis A., Malvern Instruments, Inc., US

Zeta potential provides a measurable value to monitor optimal water clarification capabilities. The magnitude of the zeta potential value indicates the repulsive interaction between particles; a zero zeta potential means that the conditions for the [...]

New UV Technology for Point-of-Use Water Disinfection

Bilenko O., Bilenko Y., Shturm I., Bilenko O., Bilenko Y., Shatalov M., Gaska R., Sensor Electronic Technology, Inc., US

We will report on a record performance of an all-LED point-of-use water disinfection system that utilizes our deep UV LED lamps with peak emission wavelengths in the range from 270 nm to 280 nm. Results [...]

Innovative Cost-effective Pre-treatment for Desalination

Lean M.H., Seo J., Kole A., Volkel A.R., Chang N., Hsieh B., Melde K., Palo Alto Research Center, US

This paper describes an innovative technology to pre-treat feed water for desalination. An inline coagulation-flocculation-separation (CFS) system is detailed that does not require filtration or sedimentation. Advantages include: scalability, modularity, rapid processing, low energy, and [...]

Ion Rejection Properties of Nanofiltration Membranes With Inhomogeneous Charge Distribution

Szymczyk A., Zhu H., Balannec B., University of Rennes 1, FR

Ion rejection properties of NF membranes with inhomogeneous fixed charge distributions are investigated theoretically. It is shown that the occurrence of spatial inhomogeneities in the fixed charge concentration may lead to an enhancement of the [...]