<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hi Tim,<div class=""><br class=""></div><div class="">You could look into caswellplating, they have an EN Nickel process/kit and basically they take a couple steps to plate out all of the nickel in the solution so that it’s no longer hazardous. Their products aren't geared towards semi work, but you might be able to do something similar for the Transene process.</div><div class=""><br class=""></div><div class="">Thanks,</div><div class="">Shawn Wright</div><div class=""><div class="">Lead Research Engineer</div><div class="">Operations Group, Lurie Nanofabrication Facility</div><div class="">University of Michigan</div></div><div class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Feb 3, 2021, at 4:17 PM, Tim Gilheart <<a href="mailto:gilheart@rice.edu" class="">gilheart@rice.edu</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta http-equiv="Content-Type" content="text/html; charset=utf-8" class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Greetings all,<div class=""><br class=""></div><div class="">The Rice cleanroom team is working with our counterparts in Environmental Health & Safety to identify best practices for managing the waste generated by the electroless nickel plating process our users now need us to support.</div><div class=""><br class=""></div><div class="">This process is based on Transene’s Nickelex product (<a href="https://transene.com/ni/" class="">https://transene.com/ni/</a>), and we do not have a dedicated plating bench. Our users anticipate working with beaker-scale quantities, which our staff team believes we can properly support at our acid bench.</div><div class=""><br class=""></div><div class="">Our EHS colleague is concerned about the amount of Ni in solution the leftover plating bath will generate, and is uncertain if our waste treatment system will be sufficient. Our treatment system treats all our waste water with sodium bicarbonate and treats with NaOH/H2SO4 as needed to meet the pH specs we’ve set. </div><div class=""><br class=""></div><div class="">We’re expecting plating waste to be 1-L per day or less on average, and our wastewater outflow exceeds a thousand gallons per day. We may be close to acceptable Ni levels in the waste stream (2.0 ppm locally) already, just by volume alone, but this is probably not ideal.</div><div class=""><br class=""></div><div class="">I’m sure managing electroless nickel waste is routine for a good number of you on the list, so we’d appreciate any insights you can share.</div><div class=""><br class=""></div><div class="">Thanks in advance!</div><div class=""><br class=""><div class=""><div dir="auto" style="caret-color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">-- <br class="">Tim Gilheart, Ph.D.<br class="">Research Scientist - Nanofabrication Cleanroom Manager,<br class="">Shared Equipment Authority (SEA), Rice University<br class="">Cell: 832-341-5488 | Office: 713-348-3159 | <a href="mailto:gilheart@rice.edu" class="">gilheart@rice.edu</a><br class=""></div>
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