Bellwork: 10/19/2011 Collect the following data: • Temperature Salt Water Tanks Only: • DO - Phosphate • Turbidity - Salinity • Nitrate - Calcium • Nitrite - Water Hardness • Ammonia • pH Make sure to clean out any excess food from your filter and gravel/sand. Scrub the inside of the glass & clean the out with Windex once you are finished.
33
Embed
Bellwork: 10/19/2011 Collect the following data: Temperature Salt Water Tanks Only: DO- Phosphate Turbidity- Salinity Nitrate- Calcium Nitrite- Water Hardness.
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Bellwork: 10/19/2011Collect the following data:
• Temperature Salt Water Tanks Only:
• DO - Phosphate
• Turbidity - Salinity
• Nitrate - Calcium
• Nitrite - Water Hardness
• Ammonia
• pHMake sure to clean out any excess food from your filter and gravel/sand. Scrub off the inside of the glass & clean the outside with Windex once you are finished.
If you are not helping with the water chemistry, you must be working on the following: Groups of 2 or
less!1. You are a doctor in a rural area. A mother brings her 3-month old son in
who is having trouble breathing & vomiting throughout the day. Once you have completed a physical examination you discover that the infant has blue discoloration inside his mouth, as well as blueness on his hands & feet. The mother tells you that they get their drinking water from a local well.
a) What is the name of this condition?
b) Describe the pathway from consumption of a contaminant to the expression of illness.
c) What is the likely source of the contamination?
d) What can be done to immediately treat the child?
e) What can be done within the home to prevent further exposure to contaminants?
f) What can be done locally to prevent this exposure from affecting others?
Non-living Contaminant Review1. What are cyanotoxins? How are they produced? How could this be prevented?
Non-living Contaminant Review2. What type of soils are most vulnerable to high levels of TDS? Why?
Non-living Contaminant Review3. When considering thermal pollution, what are its effects on DO & bacterial growth? How can this be avoided?
Non-living Contaminant Review4. List 3 sources of nitrates in bodies of water:
Non-living Contaminant Review5. What are DBPs? Where do they come from? What are their possible effects on human health? Why do we use them?
Bellwork – 10/15/20121. 2.5 % of the planet's water is fresh water. What
& what percent make up this small amount?
2. List the reactions from the carbonate buffering system from most basic to most acidic.
• Involved in 11 drinking water outbreaks with 529 cases and 15 recreational water outbreaks with 387 cases in USA (1971-2000)
• Incidence – 730,000 (estimated) cases (USA)– 210 million cases and 300,000 deaths worldwide– All pathogenic E. coli: 1.5 billion (estimated) case and 3 million death
worldwide• Reservoirs: humans and animals (cattle, goats, sheep, deer, ….)• Incubation period: typically 1-3 days• Duration of illness: 2-12 days• Mode of transmission: Direct (person-to-person) and indirect (fomites,
water, and food)
Salmonella spp.
• Elongated and straight rod
• >2,000 serotypes• Diarrhea, fever,
headache, constipation, malaise, chills, and myalgia
• 12% - 30% mortality
Salmonella spp. : Epidemiology
• Involved in 12 drinking water outbreaks with 2,370 cases in USA (1971-1992)
• Incidence – An estimated1.4 million cases with 500 death in USA– An estimated 21 million cases of typhoid fever and 200,000
deaths occur worldwide. • Reservoirs: humans and animals (cattle, chicken, turkey…)• Incubation period: typically 1-3 days• Duration of illness: 2-7 days• Mode of transmission: Direct (person-to-person) and
indirect (fomites, water, and food)
Vibrio cholerae
• Straight or curved rod• Motile with flagella• 0.5-0.8 µm in width and
1.4-2.6 µm in length
• Profuse watery diarrhea, vomiting, circulatory collapse and shock.
• 40 - 60 % of typical cases are fatal if untreated
Vibrio spp. : Epidemiology
• Involved in 2 drinking water outbreaks with 28 cases in the USA (1971-2000)
• Incidence – 0-5 cases per year in the United States. – A major cause of epidemic diarrhea throughout the developing world. – Ongoing global pandemic in Asia, Africa and Latin America for the last
four decades. • Reservoirs: humans, environmental reservoirs - may be associated
with copepods or other zooplankton • Incubation period: a few hours to 5 days; usually 2-3 days • Duration of illness: several days• Mode of transmission: Indirect (water and food)