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Design News, May 2013

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Design Decisions approaching OSHA's eight hour PEL. NUCON replicated the test methods in a University of Minnesota study conducted in 2008, breaking 40 T-8 lamps in a four-foot long package using a mercury vapor containment bag. While the original study focused on measuring mercury vapor levels outside of the package, NUCON's test methodology was designed to measure mercury vapor levels both inside and outside the package. The initial control tests using no adsorbent yielded extremely high and dangerous vapor readings inside the package. The vapor levels rapidly rose above both the OSHA eight hour PEL and the NIOSH's IDLH level. When an adsorbent was introduced within the packages, vapors found within lamp storage, shipping or recycling containers decreased. Results show the adsorbent significantly reduces the initial vapor readings and then in a short amount of time, rapidly begins to reduce the overall vapor levels. Levels were reduced by nearly 60 percent in only 15 minutes and over 95 percent after 12 hours, according to the NUCON study. Another significant feature of the adsorbent technology is its overall capacity to adsorb mercury vapors. The testing has shown that the adsorption capacity of the adsorbent is well in excess of the potential mercury vapor that could be released from 100 percent breakage of a full lamp package. Further, in the 40 lamp break tests, only a small percentage of the capacity of the pad was used. This capacity is particularly important due to the fact that lamps release mercury vapors for many days after the initial breakage. While the mercuryspecific packaging has been proven to effectively contain high levels of vapor, this added adsorption quality will provide a necessary layer of protection against incidental mercury exposure for generators, transporters and consumers as they handle and recycle used lamps. Design News | MAY 2013 | Looking Ahead To safeguard against mercury exposure, used and broken CFLs must be placed in mercury-specific packages that can contain and adsorb vapor, reducing concentrations that accumu- late within packaging to safe levels. By utilizing an adsorbent technology, mercury vapors are greatly reduced and provide safe handling and recycling of fluorescent lamps and CFLs. DN TM micro fasteners Ideal for today's compact electronics f *DPLQJ +DQG +HOG 'HYLFHV f 1RWHERRNV f &HOO 6PDUW 3KRQHV f 7DEOHW &RPSXWHUV 1(: 7R VHH RXU FRPSOHWH OLQH RI PLFUR3(0 IDVWHQHUV DQG FDSDELOLWLHV JR WR RXU ZHEVLWH DQG FOLFN RQ WKH PLFUR3(0 EXWWRQ PLFUR3(070 6HOI &OLQFKLQJ 7DFN3LQj )DVWHQHUV{'HVLJQHG IRU 6KHHW WR 6KHHW $WWDFKPHQW f f f f 5HSODFHV VFUHZV ZHOGV DQG DGKHVLYHV $WWDFKHV WRS VKHHWV DV WKLQ DV PP } &OLQFKHV LQWR EDVH SDQHO DV KDUG DV +5% +% 7DSHUHG DQG LQWHUIHUHQFH ILW PLQLPL]H KROH WROHUDQFH LVVXHV Locating pins Standoffs/spacers Low profile head screws Inserts for plastics Surface mount nuts/spacers *R WR ZZZ SHPQHW FRP DQG VHOHFW WKH SURGXFW OLWHUDWXUH WDE WR YLHZ PLFUR3(070 6HOI &OLQFKLQJ 7DFN3LQ70 EXOOHWLQ www.pemnet.com w w w. d e s i g n n e w s . c o m M o n t h 2 0 1 3 D e s i g n N e w s –15– magenta cyan yellow black 383 ©2013 ES246198_DN1305_015.pgs 05.03.2013 22:01 UBM

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