Navigation Links
High-speed filter uses electrified nanostructures to purify water at low cost
Date:8/31/2010

By dipping plain cotton cloth in a high-tech broth full of silver nanowires and carbon nanotubes, Stanford researchers have developed a new high-speed, low-cost filter that could easily be implemented to purify water in the developing world.

Instead of physically trapping bacteria as most existing filters do, the new filter lets them flow on through with the water. But by the time the pathogens have passed through, they have also passed on, because the device kills them with an electrical field that runs through the highly conductive "nano-coated" cotton.

In lab tests, over 98 percent of Escherichia coli bacteria that were exposed to 20 volts of electricity in the filter for several seconds were killed. Multiple layers of fabric were used to make the filter 2.5 inches thick.

"This really provides a new water treatment method to kill pathogens," said Yi Cui, an associate professor of materials science and engineering. "It can easily be used in remote areas where people don't have access to chemical treatments such as chlorine."

Cholera, typhoid and hepatitis are among the waterborne diseases that are a continuing problem in the developing world. Cui said the new filter could be used in water purification systems from cities to small villages.

Faster filtering by letting bacteria through

Filters that physically trap bacteria must have pore spaces small enough to keep the pathogens from slipping through, but that restricts the filters' flow rate.

Since the new filter doesn't trap bacteria, it can have much larger pores, allowing water to speed through at a more rapid rate.

"Our filter is about 80,000 times faster than filters that trap bacteria," Cui said. He is the senior author of a paper describing the research that will be published in an upcoming issue of Nano Letters. The paper is available online now.

The larger pore spaces in Cui's filter also keep i
'/>"/>

Contact: Louis Bergeron
louisb3@stanford.edu
650-725-1944
Stanford University
Source:Eurekalert  

Page: 1 2 3 4

Related biology technology :

1. Supelco(R) Expands Ascentis(R) Express HPLC Columns Line for High-Speed and High-Efficiency Separations
2. Frost & Sullivan Recognizes Kraton Polymers for Developing a New Generation of Polymer Grades Suitable for High-Speed Processing in Nonwoven Manufacture
3. Signatec Unveils PX14400, Its High-Speed PCI-Express Digitizer Capable of Sustained Recordings Over 1.2 GB/s with Xilinx Virtex-5 FPGAs for Embedded Real-Time Processing
4. Smallest nanoantennas for high-speed data networks
5. IGEN Networks signs Exclusive Agreement with Machlink, for wireless technology with high-speed Internet, phone and data applications
6. Filter Markets - Discover the Growth Segments
7. New Gas Clean Filter Technology From Varian, Inc. Reduces Contamination in GC, ICP and GC/MS
8. Regal Introduces Four, Six and Eight Port Filtered and Un-Filtered Right Angle BNC Connectors
9. ElutraSep Inc. Announces the Launch of the Cryptonite™ HV Filter Module for Cryptosporidium and Giardia Testing
10. Angiotech Pharmaceuticals announces FDA 510(k) clearance of the Option(TM) Inferior Vena Cava Filter
11. Oclaro(TM) Hits Milestone With Clarity(TM) Fluorescence Filters
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
High-speed filter uses electrified nanostructures to purify water at low cost
(Date:12/19/2014)... Ed Bilsky, Ph.D., vice president for Research ... in the Neurosciences (CEN), and professor of pharmacology at ... a member of the prestigious Dana Alliance for Brain ... to receive this honor. , The Dana Alliance ... Dana Foundation. Its mission is to advance public ...
(Date:12/19/2014)... 2014 With only 2 weeks left ... on Sartorius Biohit products . The product specials include ... Electronic Pipette Trade-in Program, and free pipette tips. , ... around the world. They are ideal for lab technicians ... ,     Full volume range of 0.1 uL ...
(Date:12/17/2014)... NY (PRWEB) December 16, 2014 The ... changes since 2013, which is why IBISWorld updated its ... industry continues to benefit from an intensified focus on ... proposal for new emission standards for power plants and ... operators. According to IBISWorld Industry Analyst Sarah Kahn, “a ...
(Date:12/17/2014)... Beach, CA (PRWEB) December 17, 2014 ... Inc. to provide a larger packaged waste water treatment ... in King Abdullah Economic City (KAEC). Two years ago ... EMAAR’s Jeddah Gate Development, serving two residential towers with ... capacity is over a quarter million gallons per day ...
Breaking Biology Technology:UNE's Ed Bilsky Named Member of Dana Alliance for Brain Initiatives 2UNE's Ed Bilsky Named Member of Dana Alliance for Brain Initiatives 3Major Pipette Distributor Pipette.com Announces Sartorius Year End Specials 2Activated Carbon Manufacturing in the US Industry Market Research Report Has Been Updated from IBISWorld 2Activated Carbon Manufacturing in the US Industry Market Research Report Has Been Updated from IBISWorld 3
... 19 Alexandria Real Estate Equities, Inc. (NYSE: ... offering of 7,000,000 shares of common stock at a price ... of 4,500,000 shares. Merrill Lynch & Co., Citi and ... & Woods and Scotia Capital acted as co-managers in connection ...
... - EPA Exercises Option to Extend Contract with Caliper ... (Nasdaq: CALP ), a leading provider of ... research, today announced that the United States Environmental Protection ... generated by Caliper Discovery Alliances and Services (CDAS) under ...
... Administration, Bioavailability, Safety, and Efficacy of TreatmentsMOUNTAIN ... its recent analysis of the ocular drug ... Pharma with the 2009 North American Frost ... Advancement of the Year, for its two ...
Cached Biology Technology:Alexandria Real Estate Equities, Inc. Announces Pricing of Public Follow-On Offering of 7,000,000 Shares of Common Stock 2Alexandria Real Estate Equities, Inc. Announces Pricing of Public Follow-On Offering of 7,000,000 Shares of Common Stock 3EPA Presents Initial Results from Caliper Life Sciences' ToxCast Screening Effort 2EPA Presents Initial Results from Caliper Life Sciences' ToxCast Screening Effort 3EPA Presents Initial Results from Caliper Life Sciences' ToxCast Screening Effort 4Frost & Sullivan Recognizes Novagali Pharma for Innovation in Ophthalmic Therapies 2Frost & Sullivan Recognizes Novagali Pharma for Innovation in Ophthalmic Therapies 3Frost & Sullivan Recognizes Novagali Pharma for Innovation in Ophthalmic Therapies 4
(Date:12/19/2014)... --Research and Markets ( http://www.researchandmarkets.com/research/86ncd6/micro_market ) has ... North America Perimeter Security Systems Market" report to ... The North American perimeter security market is ... 2014 to 2019. Although the U.S. market holds a ... is expected to grow at a higher CAGR ...
(Date:12/17/2014)... , Dec. 15, 2014  HITLAB SM ... Clinical Practices (GCP) audit to confirm its adherence ... regulations. This accomplishment enables HITLAB to conduct regulated ... the highest principles for patient safety and research ... global healthcare access, quality, and delivery with innovative ...
(Date:12/11/2014)... , Dec. 09, 2014 Research and Markets ... ( http://www.researchandmarkets.com/research/twhjll/biometrics_market ) has announced ... the APAC Region 2015-2019"  report to their offering. ... this market is advances in technology. With continuous ... biometric solutions to the latest standard that meets ...
Breaking Biology News(10 mins):Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 2Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 3HITLAB Completes GCP Audit for FDA Smart Device & App Compliance 2Biometrics Market in the APAC Region 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2
... has published the genome sequence of the rhesus macaque ... genomes. Published April 13 in a special section of ... primate species share about 93 percent of their DNA, ... In its paper, the Rhesus Macaque Genome Sequence and ...
... at the University of Chicago have found an unsuspected link ... and triglycerides in the blood) in mice. The finding could ... disease by lowering elevated lipid levels. , In ... by James C. Lo, an MD, PhD student, in the ...
... asbestos exposure ?have a higher survival rate when treated with ... finds. , Mesothelioma, a rare but aggressive form of cancer ... abdomen, is associated with exposure to asbestos. There is no ... and cisplatin ?along with the vitamin supplements folic acid and ...
Cached Biology News:Analysis of rhesus monkey genome uncovers genetic differences with humans, chimps 2Analysis of rhesus monkey genome uncovers genetic differences with humans, chimps 3Link found between immune system and high plasma lipid levels 2Chemo combination improves survival in asbestos-related cancer 2Chemo combination improves survival in asbestos-related cancer 3
Peptide-affinity Purified Polyclonal Antibody to Histamine H2 Receptor...
Mouse Wnt-9b Biotinylated Affinity Purified PAb ENTREZ GeneID: 22412...
...
... Ambions MAXIscript In Vitro Transcription Kits synthesize ... x 10 9 cpm/g. High specific ... ribonuclease protection assays, in situ hybridization, and ... used for the synthesis of modest amounts ...
Biology Products: