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Metallic lead is obtained by reducing PbO with carbon monoxide at around 1,200 °C (2,200 °F): [13] PbO + CO → Pb + CO 2. The red and yellow forms of this material are related by a small change in enthalpy: PbO (red) → PbO (yellow) ΔH = 1.6 kJ/mol. PbO is amphoteric, which means that it reacts with both acids and with bases.
In the 18th century lead poisoning was fairly frequent on account of the widespread drinking of rum, which was made in stills with a lead component (the "worm"). It was a significant cause of mortality amongst slaves and sailors in the colonial West Indies. [280] [281] Lead poisoning from rum was also noted in Boston. [282]
When inhaled, lead(II,IV) oxide irritates the lungs. In case of high dose, the victim experiences a metallic taste, chest pain, and abdominal pain. When ingested, it is dissolved in the gastric acid and absorbed, leading to lead poisoning. High concentrations can be absorbed through skin as well, and it is important to follow safety precautions ...
The researchers analyzed historical data on childhood blood-lead levels, leaded gas use and U.S. population statistics, determining that more than 170 million Americans had "clinically concerning ...
Humans have been smelting lead for thousands of years, poisoning themselves in the process. Although lead poisoning is one of the oldest known work and environmental hazards, the modern understanding of the small amount of lead necessary to cause harm did not come about until the latter half of the 20th century. No safe threshold for lead ...
An investigative report by Kevin Flowers discovered more than $21 million in federal funding has come to the city since 1997 to combat lead-based paint in homes.These funds have been used to deal ...
For questions about lead exposure and poisoning, or if you need emergency assistance, call Poison Help at 1-800-222-1222 or visit PoisonHelp.org for additional resources. For more CNN news and ...
Before that, the Health Department had a lead poisoning prevention program that mainly consisted of mandatory blood testing for children under 3. The 2004 law, called Local Law 1, beefed up the housing department’s inspection system, requiring that officials check for deteriorating lead paint when they are called for any complaint to an ...
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