International Space Station is chemisch zwaar verontreinigd

Concentraties van potentieel schadelijke chemische verbindingen in stof verzameld door luchtfiltratiesystemen in het International Space Station overtreffen die in vloerstof van veel westerse woningen, dit onthult een nieuw onderzoek.

https://www.kuuke.nl/international-space-station-is-chemisch-zwaar-verontreinigd/

#ChemsicheVerontreiningen #InternationalSpaceStation #iss #paks #PBDEs #PCBs #PFAS #vlamvertragers

"The #UnitedStates Air Force has detected unsafe levels of a likely #carcinogen in underground launch control centres at a #NuclearMissileBase in #Montana where a striking number of men and women have reported #cancer diagnoses." #PCBS #PCB

#Carcinogens found at US nuclear missile sites as reports of cancer surface | Nuclear Weapons News | Al Jazeera
https://www.aljazeera.com/news/2023/8/8/carcinogens-found-at-us-nuclear-missile-sites-as-reports-of-cancer-surface

#Farmers Deceived About #Sewage #Sludge Safety

April 2, 2010

"On March 27th [2010] Citizens for Sludge-Free Land sent a letter to the #Virginia Department of Environmental Quality and US #EPA Region 3 that information provided to Virginia landowners about using sewage sludges as #fertilizer is deceptive. Land application permits are being granted in several Virginia counties without informing farmers of the serious risks associated with this practice. The VA code specifies, that to be valid, these permits can only be granted with the #InformedConsent of the landowner.

"The Federal #CleanWater Act defines sewage sludge as a #pollutant. Most of the pollutants that sewage treatment plants remove from wastewater concentrate in the resulting sludge. Exempt from #hazardous and solid waste laws, sludge is being spread on #agricultural land, despite mounting scientific evidence and field reports that using this contaminated waste as a cheap fertilizer is neither safe, beneficial, nor sustainable.

"The Virginia Cooperative Extension Service as well as Nutri-Blend Inc., the company that needs permits to spread sludge, are failing to provide landowners with the necessary facts, so they can make an informed decision whether or not to treat their land with sludge. The widely distributed Extension Service biosolids fact sheets-- although deceptively dated May 9, 2009-- provide out-dated, inaccurate, incomplete, and in some cases, misleading information. They overstate the alleged benefits and totally ignore the known risks and recent documented evidence of adverse health and #environmental impacts linked to sludge use. The fact sheets and brochures give the illusion that land applying sewage sludge, a complex and variable mixture of #HumanWaste and thousands of industrial #chemicals, many of which are #toxic and persistent, is a safe and normal agricultural practice.

"The information provided to landowners deceptively downplays the health risks of exposure to odors, odorant compounds, endotoxins, bacteria-laden dusts, and toxic gases at land application sites that can cause severe and permanent #lung damage. Nor are farmers told that typical sludges generated in industrialized urban areas contain not only pathogens, but also #PCBs, #dioxins, #carcinogens, #pharmaceuticals, flame retardants [#PFAS], and hormone disrupting chemicals that can damage developing organisms in parts per trillion. Many of these pollutants do not break down once they are applied to land. Worse, partial breakdown products are often more toxic than the parent material. Yet federal regulations require testing and standards for only nine toxic metals. Perhaps most important, the information provided to farmers fails to disclose that the National Academies of Science has indicated that while there are serious health concerns associated with many of the constituents of sewage sludge, there is too much uncertainty to scientifically predict the true health and environmental risks, when this complex waste mixture is applied to land.

"Finally, farmers are not told that sludge-exposure has been linked to illnesses, human deaths, livestock mortalities, groundwater pollution, and permanently degraded land. Unless there is a true and accurate disclosure of all the risks associated with this practice, there can be no true consent.

"Without informed consent, the state should not be issuing permits."

Link to archived web page (TY @internetarchive!):
https://web.archive.org/web/20221227022631/https://organicconsumers.org/press/farmers-deceived-about-sewage-sludge-safety

#PFOS #ChemicalIndustries #ToxicWaste #WaterIsLife #ForeverChemicals

Well, nice that the HUMANS get warnings. What about all the critters who eat fish?!!! You know, #bears, #birds, other #fish, etc., etc.! Humans seem to think they're the only ones who live on planet Earth, it seems...

Citing #PFAS levels, MDH says some people shouldn’t eat fish from #LakeRebecca, part of #MississippiRiver

Krystal Frasier KSTP
Published: July 31, 2023

"State health officials say certain people should now avoid eating fish caught in both Lake Rebecca near the city of Hastings and the Mississippi River from St. Paul’s Ford Dam to Hastings Dam, also known as Pool 2.

"The updated guidance is due to what state officials with the Minnesota Department of Natural Resources (DNR), the Minnesota Pollution Control Agency (MPCA) and the Minnesota Department of Health (MDH) say is new data showing a mix of pollutants — including per- and polyfluoroalkyl substances, also known as PFAS, or forever chemicals — in the fish.

"According to the agencies, children under the age of 15, people who are or could become pregnant and those who are or plan to breastfeed shouldn’t eat fish caught in those areas.

"Health officials say the update to the fish consumption guidance is only for higher-risk populations and stress that the PFAS risk is based on long-term exposure, not short-term exposure after only a few meals. In addition, anglers can still enjoy fishing at those sites, but on a catch-and-release basis.

"Other areas for fishing include Lake Nokomis, Rogers Lake, Bald Wagle Lake, White Bear Lake and the St. Croix River south of Stillwater.

"Exposure to a few types of PFAS has been linked to some kinds of cancer.

"Previously, the state’s guidance for fish consumption in those same areas was not eating certain kinds of fish due to levels of #mercury and polychlorinated biphenyls, also known as #PCBs."

Source:
https://kstp.com/kstp-news/top-news/citing-pfas-levels-mdh-says-some-people-shouldnt-eat-fish-from-lake-rebecca-part-of-mississippi-river/

#Minnesota #WaterIsLife

Ars Technica: Dissolving circuit boards in water sounds better than shredding and burning https://arstechnica.com/?p=1957869 #Tech #arstechnica #IT #Technology #electronicsrecycling #semiconductors #circuitboards #jivamaterials #microsoft #soluboard #Infineon #e-waste #Biz&IT #Tech #PCBs

My LDO test #PCBs from @aislerhq arrived 🥰. But I forgot to order the components 🙈 so I cannot solder them at this point.

Have you ever wondered how we create our amazing assembly panels, or do you want a panel for in-house assembly? Have a look at our documentation. 😋

#aisler #pcbs #electronics #makehardwarelesshard #manufacturing #europe

https://community.aisler.net/t/aisler-assembly-panels/2779

A crucial component for your awesome project is unavailable? We have compiled an article to help you find an alternative component. Check it out!

#electronics #pcbs #aisler #components #makehardwarelesshard

https://community.aisler.net/t/finding-alternatives-for-out-of-stock-components/2681

Reverse engineering: overlay a footprint picture on the PCB #PCBs ##ReverseEngineering @timonsku https://blog.adafruit.com/?p=548665

I need to go on Fiver or something, and find somebody to check over this #pcb for me.

It's a numpad, with a built in RP2040 and USB pass-through.

If this works, it'll be my template for most things I would want to build.

If it doesn't work, it's a pretty expensive mistake.

#PCBs #Keyboard

We're having an @oshwassociation #OHS2023 watch party here at @DoESLiverpool to watch the live stream of the conference.

Really enjoying @sjpiper145's talk encouraging us to #WTFM (not just #RTFM)

(And so many #wearables and pretty #PCBs popping up all through the day!)

@ve7fim Do you have a sense if PCB shops are going to have a hard time with this?

Basically it's a hole through part of some pads, and a via used to attach to it.

With the size of the board I'm trying to make, the stabilizers and edge connectors need to be in the same space.

#PCBs

I ordered my Mini Fig Pi two days ago, and it arrived today! Of course, @ben_shockley and I are both in the KC area, so your results may vary. 😁
These are 1:1 scale with actual LEO Minifigures, so they're obviously tiny, but surprisingly so when holding one. 🤏 🔍
Get yours here: https://minifigboards.com/product/fig-pi
#LEDs #RGB_LEDs #PCBs #RaspberryPi #Pico #CircuitPython

RT @DM5TU
#HAMRADIO #DIY grab the #pcbs as long as supplies last= great stuff https://twitter.com/lex_ph2lb/status/1645452065223716865

I think this sort of thing is why I find #PCBs so much more satisfying than coding.

On the left board, I accidentally bridged the traces that control the bottom two rows in the right board, so whenever I pressed one of those buttons I would get inputs from both keys in the column.

So I disconnected the rows, ran some new wires, and tried again. And it worked!

I am definitely intentionally trying out every color from #JLCPCB.

Green, red, blue, and purple are very bright and glossy. Red looks like a sports car. Green and blue look very nice and professional. Purple has this beautiful golden shine to it.

Black has a cool matte look, but seems much more prone to visible imperfections.

White is very white, and the only option with the black silkscreen.

There's some visible lines on the white silkscreens, when it's filling a larger area.

#PCBs

Very excited to build these.

#PCBs

New #PCBs!

The purple from JLCPCB is absolutely beautiful.

Okay, this one is just fun.

It's just a side of a hexagon-shaped neo-pixel board. I want some lights behind my TV for notifications, but mostly it's just a very small board to maximize shipping.

And I get to have Noto Sans Emoji embedded directly into copper.

#PCBs

Latest design: attaching 6 of these 5x5 #PCBs together to create a massive 150% mechanical #keyboard.