Monona Rossol, M.S., M.F.A., Industrial Hygienist
President: Arts, Crafts & Theater Safety, Inc.
Safety Officer: Local USA829, IATSE
181 Thompson St., #23
New York, NY 10012 212-777-0062
-----Original Message-----
From: Secretary, ACS Division of Chemical Health and Safety <secretary**At_Symbol_Here**DCHAS.ORG>
To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Sent: Thu, Jul 30, 2015 7:16 am
Subject: [DCHAS-L] Reducing Environmental Toxicity of Silver Nanoparticles through Shape Control
There's an interesting article on environmental aspects of nanoparticles at the
ES&T web site.
- Ralph
Reducing Environmental Toxicity of Silver
Nanoparticles through Shape
Control
https://urldefense.proofpoint.com/v2/url?u=http-3A__pubs.acs.org_doi_full_10.1021_acs.est.5b01711&d=BQIFaQ&c=lb62iw4YL4RFalcE2hQUQealT9-RXrryqt9KZX2qu2s&r=meWM1Buqv4IQ27AlK1OJRjcQl09S1Zta6YXKalY_Io0&m=hF1qzwnxV644CAs1LKqyDod_wvkVm_0Um9US3g4FdPA&s=rOp8niWFn4SmimlqAjXSZuxcnblSZ8t7E5M86Yk7y2Q&e=
The use of antibacterial silver nanomaterials in consumer products ranging
from textiles to toys has given rise to concerns over their environmental
toxicity. These materials, primarily nanoparticles, have been shown to be toxic
to a wide range of organisms; thus methods and materials that reduce their
environmental toxicity while retaining their useful antibacterial properties can
potentially solve this problem. Here we demonstrate that silver nanocubes
display a lower toxicity toward the model plant species Lolium multiflorum while
showing similar toxicity toward other environmentally relevant and model
organisms (Danio rerio and Caenorhabditis elegans) and bacterial species
(Esherichia coli, Bacillus cereus, and Pseudomonas aeruginosa) compared to
quasi-spherical silver nanoparticles and silver nanowires. More specifically, in
the L. multiflorum experiments, the roots of silver nanocube treated plants were
5.3% shorter than the control, while silver nanoparticle treated plant roots
were 39.6% shorter than the control. The findings here could assist in the
future development of new antibacterial products that cause less environmental
toxicity after their intended use.
