Alchemists found a successful formula to turn
lead into gold.
A new study demonstrates that this waste stream could be shedding
lead into the environment.
Smoking any type of tobacco products on the range should be prohibited to prevent acceleration of inhaled
lead into the blood stream and ingestion of lead transferred from hands to the cigarette, cigar, etc.
The city also added calcium orthophosphate to the water supply to control corrosion in pipes which leaches
lead into drinking water and recommended running taps for one minute before using.
Dietary iron deficiency can cause increased absorption of
lead into the blood from lead stored in the bones.
* treatment of lead-bearing waste material...a) remove contaminants via mechanical or aqueous scrubbing, concentrating the lead bearing components for recycling or further toxicity treatment; b) thermal/mechanical treatment...transform
lead into a more stable compound, i.e., lead-silicate glass, to minimize leaching; c) metallic iron additions...in theory, iron added to waste sands diminishes the leaching process, the more chemically active metallic iron actually displacing the lead, rendering the sand nonhazardous.
Other studies have shown that the intrusion of
lead into the lens of the eye may cause protein conformational changes that decrease lens transparency.
"Adults today grew up at a time when we were still putting several hundred thousand tons of
lead into gasoline each year."
Results from this limited number of cases support the hypothesis that the release of bone
lead into blood may substantially buffer the decrease in blood lead levels expected from the reduction in lead intake.
However, individuals with the variant gene shunted proportionately more of their stored
lead into the spongier trabecular bone (of kneecaps and vertebrae, for instance) than did those with the normal gene.
Lead solder, flux and piping have also been banned by EPA because these plumbing materials can release traces of
lead into the water.
It follows, therefore, that the most effective means of reducing lead levels in well-perfused tissues exhibiting slow lead toxicokinetics (brain), as well as poorly perfused tissues (e.g., the skeleton), is to maximize the lead concentration gradient between these tissues and blood for prolonged periods of time, thereby favoring continued efflux of
lead into the circulation and elimination via urinary of fecal routes.
They found that women who never had children -- and therefore never shed significant bone and bone-bound lead to developing offspring -- carry far more
lead into old age than those who had been pregnant.
Times of physiologic stress such as menopause can result in the release of stored
lead into the blood through demineralization, the same process that causes calcium to be released from bone.
(16) suggested that disintegration caused by mechanical joint action leads to an increased release of
lead into synovial fluid.
