Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > New biosensor monitors water quality

A fabricated electrode with a grown MWCNT array (CNT post fabricated at the UC Nanoworld Lab).
A fabricated electrode with a grown MWCNT array

(CNT post fabricated at the UC Nanoworld Lab).

Abstract:
Cyanobacterial harmful algal blooms frequently occur in drinking water sources around the world due to eutrophication as a result of antrophogenic activities. Their presence in water is a potential threat because some species of cyanobacteria can produce and release potent toxic compounds (cyanotoxins), such as hepatotoxins, neurotoxins, and dermatotoxins.

New biosensor monitors water quality

Germany | Posted on January 9th, 2013

Among hepatotoxins, microcystins (MCs) are the most frequently reported cyanotoxins and MC-LR is the most commonly occurring congener of MCs worldwide as well as in the USA. The World Health Organization (WHO) has proposed a provisional concentration limit of MC-LR in drinking water of 1 μg L-1. Therefore, there is a need for techniques to monitor MC-LR in various sources of water.

Recently, Prof. Dionysiou's group at the University of Cincinnati (UC) in the USA and his collaborators (UC and USEPA, Cincinnati, USA; and NCSR Demokritos, Athens, Greece) developed a multi-walled carbon nanotube (MWCNT)-based electrochemical biosensor to monitor MC-LR in sources of drinking water supplies.

They reported the formation of oxygen-containing functional groups on the MWCNT surface following electrochemical functionalization in alkaline solution. The performance of the MWCNT array biosensor demonstrated a marked increase of the electron-transfer resistance upon antibody conjugation. The biosensor's electron-transfer resistance showed a linear dependence on the MC-LR concentration ranging from 0.05 to 20 μg L-1. The sensing performance of the biosensor at low MC-LR concentration allows monitoring of this cyanotoxin well below the drinking water provisional concentration limit of 1 μg L-1.

####

For more information, please click here

Copyright © Wiley-VCH Materials Science Journals

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

Link to the original paper on Wiley Online Library:

Related News Press

News and information

HP Supercomputer at NREL Garners Top Honor October 19th, 2014

First Canada Excellence Research Chair gets $10 million from the federal government for oilsands research at the University of Calgary: Federal government announces prestigious research chair to study improving oil production efficiency October 19th, 2014

Ucore's McKenzie to Deliver Presentation to Rare Earths Conference in Singapore as Highlight of Fall 2014 Marketplace Schedule October 19th, 2014

Non-Toxic Nanocatalysts Open New Window for Significant Decrease in Reaction Process October 19th, 2014

Nanotubes/Buckyballs

Beyond LEDs: Brighter, new energy-saving flat panel lights based on carbon nanotubes - Planar light source using a phosphor screen with highly crystalline single-walled carbon nanotubes (SWCNTs) as field emitters demonstrates its potential for energy-efficient lighting device October 14th, 2014

NTU develops ultra-fast charging batteries that last 20 years October 14th, 2014

Fast, cheap nanomanufacturing: Arrays of tiny conical tips that eject ionized materials could fabricate nanoscale devices cheaply October 4th, 2014

Nano-bearings on the test bench: Fullerene spheres can be used to slide in the nanoworld October 3rd, 2014

Discoveries

Non-Toxic Nanocatalysts Open New Window for Significant Decrease in Reaction Process October 19th, 2014

Plastic nanoparticles also harm freshwater organisms October 18th, 2014

Superconducting circuits, simplified: New circuit design could unlock the power of experimental superconducting computer chips October 18th, 2014

Nanotechnology Improves Quality of Anti-Corrosive Coatings October 17th, 2014

Announcements

HP Supercomputer at NREL Garners Top Honor October 19th, 2014

First Canada Excellence Research Chair gets $10 million from the federal government for oilsands research at the University of Calgary: Federal government announces prestigious research chair to study improving oil production efficiency October 19th, 2014

Ucore's McKenzie to Deliver Presentation to Rare Earths Conference in Singapore as Highlight of Fall 2014 Marketplace Schedule October 19th, 2014

Non-Toxic Nanocatalysts Open New Window for Significant Decrease in Reaction Process October 19th, 2014

Water

New Nanocomposites Help Elimination of Toxic Dyes October 15th, 2014

Fast, cheap nanomanufacturing: Arrays of tiny conical tips that eject ionized materials could fabricate nanoscale devices cheaply October 4th, 2014

Production of Filters for Separation of Water from Petroleum Products in Iran October 1st, 2014

Malvern Instruments & Aurora Water conference presentation illustrates value and cost-saving potential of on-line zeta potential in water treatment: 2014 RMSAWWA/RMWEA Joint Annual Conference, Albuquerque, New Mexico, USA September 7th 10th September 3rd, 2014

NanoNews-Digest
The latest news from around the world, FREE





  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More














ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE