[labnetwork] Piranha disposal

[julia.aebersold at louisville.edu]

We do the same as John mentioned in his response with a long plenum flush to help neutralize it as much as possible.


Cheers!


Julia Aebersold, Ph.D.

MNTC Cleanroom Manager

University of Louisville

2210 South Brook Street

Shumaker Research Building, Room 233

Louisville, KY  40292



(502) 852-1572

http://louisville.edu/micronano/

________________________________
From: labnetwork-bounces at mtl.mit.edu [labnetwork-bounces at mtl.mit.edu] on behalf of Vito Logiudice [vito.logiudice at uwaterloo.ca]
Sent: Tuesday, February 03, 2015 12:56 PM
To: 'Nava Ariel- Sternberg'
Cc: labnetwork at mtl.mit.edu
Subject: Re: [labnetwork] Piranha disposal

Hi Nava,

We have yet to come up with a formal standard operating procedure for our dedicated piranha hood. I suspect we will very likely proceed in a manner that is identical with John's description after letting the solution cool down for some minimum amount of time. The hood is equipped with a proper aspirator and the facility is served by an acid waste neutralizing system.

Best regards,
Vito
--
Vito Logiudice  P.Eng.
Director of Operations, Quantum NanoFab
University of Waterloo
Lazaridis QNC 1207
200 University Avenue West
Waterloo, ON           Canada N2L 3G1
Tel.: (519) 888-4567  ext. 38703
Email: vito.logiudice at uwaterloo.ca<mailto:vito.logiudice at uwaterloo.ca>
Website: https://fab.qnc.uwaterloo.ca


From: <Weaver>, John R <jrweaver at purdue.edu<mailto:jrweaver at purdue.edu>>
Date: Tuesday, 3 February, 2015 8:13 AM
To: 'Nava Ariel- Sternberg' <anava at tauex.tau.ac.il<mailto:anava at tauex.tau.ac.il>>, "labnetwork at mtl.mit.edu<mailto:labnetwork at mtl.mit.edu>" <labnetwork at mtl.mit.edu<mailto:labnetwork at mtl.mit.edu>>
Subject: Re: [labnetwork] Piranha disposal

Nava –
I’m in favor of aspirating it from the bath into a significant stream of running water. That would, of course, go to an acid-neutralization system.
The big advantage of this approach, of course, is the cooling as well as diluting effect of the water stream. It is important to be sure the aspirator and associated tubing will withstand the heat and oxidizing properties of the stream.
John

From: labnetwork-bounces at mtl.mit.edu<mailto:labnetwork-bounces at mtl.mit.edu> [mailto:labnetwork-bounces at mtl.mit.edu] On Behalf Of Nava Ariel- Sternberg
Sent: Tuesday, February 03, 2015 2:49 AM
To: labnetwork at mtl.mit.edu<mailto:labnetwork at mtl.mit.edu>
Subject: [labnetwork] Piranha disposal

Dear all,

Sorry for the lame-man question but our safety unit managed to confuse us with weird recommendations so I'm checking with you guys:

What is the best, safest, and most practical way to dispose piranha solution?

Thanks,

Nava




Nava Ariel-Sternberg, Ph.D.
Tel-Aviv University Center for Nanoscience and Nanotechnology, Managing Director
MNCF Manager
Phone: 03-640-5619
Mobile: 054-9984959
Email: anava at tauex.tau.ac.il<mailto:anava at tauex.tau.ac.il>

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