Hazard Identification

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Introduction Heavy metals are common throughout the environment naturally and through man made sources. The human population is exposed to low levels of heavy metals naturally every day that occur in the earth’s crust. Another source of exposure is the emission from smelters and coal fired power plants, superfund sites, and ingestion through food sources or water. Those whom have occupation that work with metals or other man-made sources of exposure are also at risk. There are specific populations such as pregnant women, breastfeeding women and children are at greater risk of health effects from exposure (Friis, 2012). The Agency for Toxic Substances and Disease Registry developed a list of hazardous substances called the Comprehensive…show more content…
In part humans can be affected by eating and drinking water which contains lead. If a home was built before 1978, the water pipes could contain lead solder. Which in turn could leak out into the water supply. Lead- based paint can contribute to lead dust because it is deteriorating ("ATSDR - Toxic Substances - Lead", 2017). Dose Response Relationship Lead can affect humans’ health in various ways depending on the route of exposure. Humans can either breathe or swallow lead. Lead can affect every organ in the human body. Lead toxicity mainly effects the nervous system in adults and children. In adults’ long-term exposure can hinder performance in test for the nervous system. Lead toxicity can also cause weakness in fingers, wrists and ankles. In middle age adults and elderly adults, it can cause anemia. High levels of exposure can cause brain and kidney damage in adults and children. Pregnant women exposed to high levels of lead can experience a miscarriage. Men exposed to high levels of lead can have their organs responsible for sperm production damaged (,2017). The dose-response relationship is the percentage of a population exhibiting an affect which is related to the concertation of a toxic substance. It is common for the effects of lead to be seen neurologic, hematopoietic and in the renal system. high levels of lead exposure in adults can cause acute adverse functional effects in the kidneys. Prolonged exposure can
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