EESA10H3 Lecture Notes - Lecture 4: Arsenic, Viktor Yushchenko, Organophosphate
28 Oct 2013
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Since its rural area its not uncommon to have nitrates. Natural contaminants (radionuclides, nitrate an nitrite, heavy metals, fluoride. ) Improper use of fertilizers, pesticides, animal manure. Leaking underground tanks, improper disposal of wastes- garbage, chemical spills at local industrial sites. Noticeable problems: visible: scum from calcium salts, turbid water form dirt- can be turbid but not containing chemicals,- likely to be contaminated. clay or rust, green stains on sink caused by high acidity. Tastes: salty taste from high sodium content, soapy taste from alkaline minerals, metallic taste from acidity or high iron content, chemical taste from industrial chemicals oil smell, gasoline smell bad. The last thing usage of chlorine, chemical treatment (disinfection- chlorination- kind of glue to put everything together, granulated activated charcoal, ion exchange resins, reverse osmosis) Groundwater: naturally filtered, less organic matter, often does not need any treatment. Swimming water: beach pollution trash, microorganisms, sore throats, diarrhea some serious poisoning. Lots of fish contains high amount of mercury.
