Home |
Search |
Today's Posts |
#16
|
|||
|
|||
Lead weights for plants
thanks for the info.
"The Outcaste" wrote in message news On Wed, 19 May 2004 13:38:07 -0700, "Charles Spitzer" bubbled forth the following: references? i work in the stained glass industry. it's pretty commonly known that almost all lead is ingested or inhaled. osha doesn't require gloves when working with lead, although they do require, in certain cases, respirators. in actuality, the only reference to skin in the osha regulation is because of possible skin irritation and not absorption. http://www.osha.gov/pls/oshaweb/owad...=STANDARDS&p_i d=10030 From http://www.osha.gov/SLTC/lead/ "Most exposures occur with inorganic lead. Organic (tetraethyl and tetramethyl) lead, which was added to gasoline up until the late 1970s, is not commonly encountered. Organic forms may be absorbed through the skin, while inorganic forms cannot." However the ERP says recent research indicates that inorganic lead may be absorbed thru the skin. They do not list references though. See this page under Dermal Absorption: http://www.epa.nsw.gov.au/leadsafe/leadinf3.htm well, it does state " inorganic lead compounds (e.g. lead nitrate, lead acetate and lead oxide) can be absorbed through the skin but in very small quantities" Further, this article from the "Journal of the Australasian College of Nutritional & Environmental Medicine, Vol. 15, No. 2, December 1996, pages 11-12. " shows that inorganic lead can be absorbed through the skin, and even worse, lead absorbed this way may not show up in the blood: "By applying solutions of the stable lead isotope Pb-204 to the skin of volunteers and measuring the increase in Pb-204 in blood, we were able to show that skin-absorbed lead has a very short residence time in blood3. The ability of lead salts to enter the body through the skin without significantly raising blood lead has important implications for occupational health control, because measurement of lead in blood is the prime technique for monitoring lead exposure. Surveys of workers in lead industries such as lead battery manufacture showed that many of them had very high levels of lead in sweat, even those who had retired or who had been away on leave for several weeks1. Workers in lead industries often wear masks to avoid inhalation of lead, but rarely have skin protection. Some lead battery workers have their skin covered with a layer of finely powdered lead/metal oxide1. Both lead metal and lead oxide were found to dissolve in sweat and pass through the skin1-3." The full article is he http://www.acnem.org/journal/15-2_de...on_of_lead.htm I always thought the main danger from handling lead is that particles that adhere to the skin may be ingested or inhaled by touching the mouth or nose, or via transfer to a cigarette, then inhaled. Looks like we may have to re-think that. HTH Jerry |
Reply |
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
For anyone worried about lead WAS Lead weights for plants | Freshwater Aquaria Plants | |||
Lead weights in pond OK ?? | Ponds | |||
Lead weights? | Freshwater Aquaria Plants | |||
Lead weights okay? | Freshwater Aquaria Plants | |||
Lead weights? | Freshwater Aquaria Plants |