water pollution & treatment science 8 chapter 2c ncscos 3.07
TRANSCRIPT
Warm-UpWarm-Up: copy each : copy each sentence with the correct sentence with the correct response.response.1. The 3 classes of indicators are ____, biological, and chemical.
2. Nitrates from fertilizers found in a water supply are _________.
3. The dirtiness or cloudiness of water is ______.
4. pH is a method of measuring the _____ of water.
5. An living organism that is used to evaluate water health is a _______.
6. ______ can form in turbid water or in the presence of nitrates.
7. A _____ is an area of land that shares the same water.
Bio- indicator
Physical Watershe
d Algal
Blooms Chemical
indicators Acidity Turbidity
What is Pollution?What is Pollution?A pollutant is any substance or
form of energy that can cause harm to the environment and make it unfit for organisms.
Two types of water pollution:1. Point Source 2. Non-Point Source
Water Pollution SourcesWater Pollution SourcesPoint Source- you know the one source of pollution; it is identified; easier to detect and control
Non-point Source- comes from many sources that can not be easily identified; harder to control
Non-Point Source Non-Point Source examples:examples:RUNOFF!!!Water comes from across a large,
more diffuse area of landFrom…farms, lawns, parking lots,
streets, construction sites, acid rain from air pollution, etc.
Biomagnification/Biomagnification/BioaccumulationBioaccumulationPollution gets into smaller organismsAmount builds up as it gets passed up
food chainChemicals could end up in food eaten
by humans
North Carolina PollutionNorth Carolina PollutionSedimentation – increases turbidity
◦Erosion◦Development◦Agriculture – tilling soil, irrigation,
livestock
Nutrient Pollution – increases Nitrate & Phosphate levels in water
Algae Low OxygenFertilizers run off in storm waterFecal Coliform Bacteria from animal feces
Water TreatmentWater TreatmentSewage Treatment Plants
◦Process raw waste & get water ready to enter back into rivers
◦1.) Sludge separated, chlorine used to kill harmful bacteria
◦2.) Oxygen & sludge-eating bacteria used
Septic Systems◦Small wastewater system used by home
or business in rural area◦Sludge consumed by bacteria◦Cleaner water exits & spreads into
ground
Water TreatmentWater TreatmentDrinking Water Treatment Plants:1. Water piped in from river or lake2. Flows through mixers, clumping
agents & chemical disinfectants added3. Clarifying pool separates large
particles4. Filters separate tiny particles of dust
& dirt5. Chlorine used to kill bacteria6. Clean water goes to water storage
tank
EPAEPAThe Environmental Protection
Agency sets and enforces water quality standards for wastewater, pollution & drinking water.
Focuses on protection of surface freshwater resources