24.03.10 - haloacetic acids chloraimes Cheapest simplest...

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March 24 th Organic Chemicals – Carbon containing Sources: include natural sources, which can contaminate source waters and may arise from  reactions during treatment processes of water AND anthropogenic sources VOCs: compounds that when released into the environment become airborne, industrial  compounds raise concerns of proper disposal. Detectable by smell/taste. At high concentrations  affect CNS, chronic exposure to low amounts lead to liver/kidney damage. Links to  leukemia/cancer. Halogenated aromatic toxicity: toxicity levels very unknown. Dioxins: family of chlorinated  hydrocarbons. Fish advisories in the great lakes for dioxins.  Methyl-tert-butyl-ether: industrial pollution banned in 2006. Low amounts affect water and is  poorly biodegradable. Use chlorine to purify water, however chlorine is very reactive with organic chemicals in water.  At least 600 disinfection byproducts are known; some of them are toxic, such as halomethanes, 
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Unformatted text preview: haloacetic acids, chloraimes. Cheapest, simplest but not effective against Crypto. Added concerns of storage. Common DBPs: chloroform and dichloroacetic acids. Worry about false positives: not positive in testing but in fact toxic to humans. Actual water content is very important criteria for selecting treatment. Best to treat water before chlorination. NOT DISINFECTING DRINKING WATER IS NOT AN OPTION! Therefore, it is best to expose the public to residues. Increasing water reuse complicates the issue. PCB: stable in environment. Used in transformers, plastics, newsprint, inks. .. now banned. Low rate of biodegradation by bacteria. Resistant to heat or chemical treatment. Dissolve readily in fatty tissues of fish, birds, animals and humans. Direct human poisoning from accidents. Sources: drinking water, air, food*....
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  • Winter '10
  • TimothyGeary
  • low amounts, 24th Organic Chemicals, proper disposal. Detectable, hydrocarbons. Fish advisories, Actual water content, storage. Common DBPs

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