Homework IV Emerging Contaminants

Homework IV Emerging Contaminants - Homework III Emerging...

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Homework III Emerging Contaminants Name ________________________ Read the attached article from the Gainesville Sun (Associated Press), “Drugs are in the Water. Does it Matter?”. Answer the following questions related to the article. Do not cut and paste. Additionally, I have provided a number of web links to articles about emerging contaminants. Based on one that you may choose, answer the relevant questions. Drugs are in the Water. Does it Matter? 1. What are P.P.C.P.’s? 2. How are P.P.C.P.’s being flushed into the nation’s rivers? 3. From where do these compounds originate in the initial waste stream? 4. Worries about these water-borne chemicals began last summer for what reason? 5. In a survey in 1999 the USGS surveyed 139 streams and found ________% of samples contained residues of drugs like _________________________________ 6. Do these compounds breakdown quickly or slowly in the environment? If they break down slowly, why are they still a problem? 7. What is the “nocebo effect”? Emerging Contaminants From the websites provided, identify two emerging contaminants. Where do they come from? How do they enter water ways? What is the potential health risk to people? What are some of the ecological risk factors?
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Drugs Are in the Water. Does It Matter? Residues of birth control pills, antidepressants, painkillers, shampoos and a host of other compounds are finding their way into the nation’s waterways, and they have public health and environmental officials in a regulatory quandary. On the one hand, there is no evidence the traces of the chemicals found so far are harmful to human beings. On the other hand, it would seem cavalier to ignore them. The pharmaceutical and personal care products, or P.P.C.P.’s, are being flushed into the nation’s rivers from sewage treatment plants or leaching into groundwater from septic systems. According to the Environmental Protection Agency, researchers have found these substances, called “emerging contaminants,” almost everywhere they have looked for them. Most experts say their discovery reflects better sensing technology as much as anything else. Still, as Hal Zenick of the agency’s office of research and development put it in an e-mail message, “there is uncertainty as to the risk to humans.” In part, that is because the extent and consequences of human exposure to these compounds, especially in combination, are “unknown,” the Food and Drug Administration said in a review issued in 2005. And aging and increasingly medicated Americans are using more of these products than ever. So officials who deal with these compounds have the complex task of balancing reassurance that they take the situation seriously with reassurance that there is probably nothing to worry about. As a result, scientists in several government and private agencies are devising new ways to measure and analyze the compounds, determine their prevalence in the environment, figure out where they come from, how they move, where
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This note was uploaded on 07/31/2011 for the course SOS 2007 taught by Professor Dr.jamesbonczek during the Summer '07 term at University of Florida.

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Homework IV Emerging Contaminants - Homework III Emerging...

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