Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > News > New nanotechnology wastewater treatment system for removing heavy metals

October 17th, 2007

New nanotechnology wastewater treatment system for removing heavy metals

News) The presence in the environment of large quantities of toxic metals such as mercury, lead, cadmium, zinc or others, poses serious health risks to humans, and this threat puts the scientific community under pressure to develop new methods to detect and eliminate toxic contaminants from wastewaters in efficient and economically viable ways.

Resulting from the combination of water treatment investigations with the latest in material science, a new type of nanomaterial called nanostructured silica has been found to fulfil the requisites necessary for these applications.

With its large surface area and regular pores, it is an ideal material that after a functionalization process that links to its surface diverse organic ligands has the capability of being able to extract heavy metals from wastewaters. This capacity also allows its use as a high sensitivity detection tool for these toxic metals, and considering that the contamination levels permitted in drinking water are increasingly restrictive; functionalized silica offers additional benefits over other water treatment methods.

The design of this nanostructured functionalized silica is based on the emulation on the material of the reaction that heavy metals have with some biomolecules in living cells. Therefore a good understanding of the reaction that bonds such metals to particular functional groups on living cells is of great use to determine the best functional groups to be used on the surface of the nanostructured material; for example, it has been detected that heavy metals interact mainly with functional groups containing oxygen, nitrogen and sulphur.


Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press


Imaging technique pulls plasmon data together: Rice University scientists' hyperspectral method analyzes many plasmonic nanoparticles in an instant March 16th, 2018

Plasmons triggered in nanotube quantum wells: Rice, Tokyo Metropolitan scientists create platform for unique near-infrared devices March 16th, 2018

Movable silicon 'lenses' enable neutrons to see new range of details inside objects March 15th, 2018

Jim Barnhart Joins Nanometrics as Senior Vice President of Operations March 15th, 2018


'Sweet spot' in sweet material for hydrogen storage: Study IDs 'white graphene' architecture with unprecedented hydrogen storage capacity March 12th, 2018

Converting CO2 into Usable Energy: Scientists show that single nickel atoms are an efficient, cost-effective catalyst for converting carbon dioxide into useful chemicals March 1st, 2018

Ultra-efficient removal of carbon monoxide using gold nanoparticles on a molecular support: New method and mechanism for state-of-the-art gas purification February 9th, 2018

New filters could enable manufacturers to perform highly-selective chemical separation January 23rd, 2018


Rice U.'s one-step catalyst turns nitrates into water and air: NSF-funded NEWT Center aims for catalytic converter for nitrate-polluted water January 5th, 2018

A new way to mix oil and water: Condensation-based method developed at MIT could create stable nanoscale emulsions November 8th, 2017

Magnetized viruses attack harmful bacteria: Rice, China team uses phage-enhanced nanoparticles to kill bacteria that foul water treatment systems August 2nd, 2017

Bacteria-coated nanofiber electrodes clean pollutants in wastewater July 1st, 2017

The latest news from around the world, FREE

  Premium Products
Only the news you want to read!
 Learn More
Full-service, expert consulting
 Learn More

Nanotechnology Now Featured Books


The Hunger Project