Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > A fresh solution for the lindane problem

Abstract:
For many years two companies located in Bizkaia, Bilbao Chemicals (Barakaldo 1947-1987) and Nexana (Erandio 1952-1982), had been manufacturing lindane and dumping it into the environment with no control whatsoever. Today we have become aware of the need to solve the problems caused by this dumping and the difficulty in achieving this since there is no viable process that will safely destroy the lindane mixed with the soil. A study by the UPV/EHU's Department of Physical Chemistry and Analytical Chemistry in collaboration with Tecnalia has confirmed the hypothesis of the high reactive capacity of iron nanoparticles to degrade lindane. The study has been published in the prestigious journal Chemosphere.

A fresh solution for the lindane problem

Usurbil, Spain | Posted on October 22nd, 2013

Lindane has been routinely used among farmers as an insecticide and pesticide, and although its use has now been banned, the consequences of lindane manufacture and use have not disappeared. The risk posed by lindane lies in the fact that it is not only toxic, it can be accumulated in living organisms. From an environmental point of view, it has low solubility, high stability and high persistence and resistance to degradation in the environment.

Although there is as yet no viable process for safely destroying lindane, an innovative, efficient alternative is to use iron nanoparticles. Iron nanoparticles have shown themselves to be very effective as a decontaminating agent when it comes to handling various families of highly toxic compounds like lindane. However, they have a number of drawbacks that limit and hamper their application, since they oxidize easily in the presence of air and their tendency to agglomerate limits their mobility in the medium in which one is seeking to apply them. So the need to protect them is done by using Carboxymethyl cellulose (CMC), polyaspartate (PAP) and poly (acrylic acid) (PAA) as biodegradable polymer coatings.
From the laboratory to the land

"The main aim of our study was to validate on a laboratory scale whether these iron nanoparticles can be applied and whether they have the capacity to eliminate the lindane," explained Itxaso San Román, member of the UPV/EHU's Department of Analytical Chemistry. This requires advanced analytical techniques capable of monitoring the degradation process, which will take place in the presence of the various nanoparticles, determining the speed of the reaction and likewise detecting the possible by-products that are formed in the course of that reaction.

The process to degrade the contaminant itself was evaluated by analysing samples of water containing lindane using the technique called solid-phase extraction (SPE). That way the lindane remaining in the solution was measured over time. Likewise, the technique involving solid-phase microextraction (SPME) was used to detect the gas by-products generated during the degradation at each moment in the study by means of gas chromatography with a mass spectrometry (GC-MS) detector.

Through the techniques employed it was possible to compare and study the effectiveness of the various types of nanoparticles used to degrade the lindane and to find out the reaction speed in each case. The study showed how the lindane gradually disappeared in the presence of the nanoparticles over time (between 1 and 72 hours), revealing various reaction tendencies and speeds. "The protection of the nanoparticles increases the effectiveness of the degradation of the lindane and also prevents the agglomeration of the nanoparticles; the result is a greater reaction surface," pointed out Itxaso San Román. However, "as the lindane concentration in water diminished over time, other less harmful by-products were seen to appear; as time passes these will probably be transformed into more innocuous compounds," she said. That way "both the coated and uncoated nanoparticles have been shown to be capable of transforming the lindane into other less harmful products," stressed San Román. "This fact provides valuable information for applying them in the future as a decontaminating tool in real environmental matrices," she added.

####

For more information, please click here

Contacts:
Aitziber Lasa

34-943-363-040

Komunikazio Bulegoa
UPV/EHU
Contact details:

(+34) 946012065

Copyright © Elhuyar Fundazioa

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

References

Related News Press

News and information

Strength in numbers: Researchers develop the first-ever quantum device that detects and corrects its own errors March 4th, 2015

New research could lead to more efficient electrical energy storage March 4th, 2015

Energy-generating cloth could replace batteries in wearable devices March 4th, 2015

Arrowhead to Present at 2015 Barclays Global Healthcare Conference March 4th, 2015

Chemistry

Chromium-Centered Cycloparaphenylene Rings as New Tools for Making Functionalized Nanocarbons February 24th, 2015

Stretch and relax! -- Losing 1 electron switches magnetism on in dichromium February 23rd, 2015

A straightforward, rapid and continuous method to protect MOF nanocrystals against water February 9th, 2015

Research shows benefits of silicon carbide for sensors in harsh environments: Advantages identified across industries February 9th, 2015

Discoveries

Energy-generating cloth could replace batteries in wearable devices March 4th, 2015

Experiment and theory unite at last in debate over microbial nanowires: New model and experiments settle debate over metallic-like conductivity of microbial nanowires in bacterium March 4th, 2015

Magnetic vortices in nanodisks reveal information: Researchers from Dresden and Jülich use microwaves to read out information from smallest storage devices March 4th, 2015

CiQUS researchers obtain high-quality perovskites over large areas by a chemical method March 4th, 2015

Announcements

Experiment and theory unite at last in debate over microbial nanowires: New model and experiments settle debate over metallic-like conductivity of microbial nanowires in bacterium March 4th, 2015

Magnetic vortices in nanodisks reveal information: Researchers from Dresden and Jülich use microwaves to read out information from smallest storage devices March 4th, 2015

CiQUS researchers obtain high-quality perovskites over large areas by a chemical method March 4th, 2015

Arrowhead to Present at 2015 Barclays Global Healthcare Conference March 4th, 2015

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

Strength in numbers: Researchers develop the first-ever quantum device that detects and corrects its own errors March 4th, 2015

Energy-generating cloth could replace batteries in wearable devices March 4th, 2015

Experiment and theory unite at last in debate over microbial nanowires: New model and experiments settle debate over metallic-like conductivity of microbial nanowires in bacterium March 4th, 2015

Magnetic vortices in nanodisks reveal information: Researchers from Dresden and Jülich use microwaves to read out information from smallest storage devices March 4th, 2015

Environment

Nanosorbents Increase Extraction, Recycling of Silver from Aqueous Solutions March 4th, 2015

Pens filled with high-tech inks for do-it-yourself sensors March 3rd, 2015

Heightened Efficiency in Purification of Wastewater Using Nanomembranes March 3rd, 2015

Colon + septic tank = unique, at times stinky, study: Researchers use lab-scale human colon and septic tank to study impact of copper nanoparticles on the environment March 2nd, 2015

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 1999-2015 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE