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Prof briefly discusses microbe and drinking water.docx

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University of Alberta
Renewable Resources
REN R360
Melanie Muise

Prof briefly discusses microbe and drinking water  Virus are so tiny, they can get around water filtration systems and cause diarrhea.  Only Hepatitis A causes a different reaction from most viruses (e.g. liver inflammation)  Parasites are in the water where sewage and animal waste are connected to drinking water and can cause diarrhea, vomiting Radionuclide: these are possible to find in water  Alpha emitters  Beta/photon emitters  Combined Radium 226/228  Radon gas (more common in indoor air than in water) o If it is detected in the indoor air, it is guaranteed to be in the indoor water. o Radon comes from soil (e.g. house built on soil with uranium). During the breakdown of uranium, radon is yielded and enters the house through indoor air through holes)  Damage to DNA and our genetic material, increase risk of getting cancer Inorganic Contaminants  Arsenic: can be found in the natural environment or in industrial environment. Can be consumed over a long period and cause skin damage, skin discoloration, affect circulatory system  Fluoride: added to drinking water to prevent dental damage. In small concentrations, fluorides don’t harm the body. In excessive concentration, it may cause bone diseases.  Lead: can be found in drinking water and are usually because of leaded pipes. However, it has been banned for 30 years. Chemical Hazards in Human Health  To distinguish between natural and manmade chemicals o Many chemicals are found in our natural environment (e.g. air, soil, water). However, a natural chemical doesn’t mean a harmless chemical. It may harm our bodies and health. Focus on today’s lecture is on the manmade chemicals (chemicals that didn’t exist before the Industrial Revolution). Human bodies now have hundreds of manmade/synthetic chemicals  More than 70 000 synthetic chemical have been created and 15 0
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