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Environmental Science > Water Quailty > Flashcards

Water Quailty Flashcards

1
Q

What are 97% of earths waters made of

A

Brackish or saline

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2
Q

How much of earths water is fresh

A

0.62%

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3
Q

What is minimum public water supply specs

A

at least 25 people, and min 15 connection

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4
Q

What minerals does percolating through soil bring?

A

Ca, Mg, Fe, Mn

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5
Q

What are the four major types of water pollution

A

Agricultural runoff, urban runoff, Domestic waste water discharge, Industrial waste water discharge

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6
Q

What are point and non point sources

A

Point come from a single place, non point come from various sources

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7
Q

What are the water quality parameters

A

Physical, chemical, microbiological,radiological

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8
Q

What is turbidity

A

Measure of waters clarity

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9
Q

What are total solids

A

suspended and dissolved solids in water or wastewater.

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10
Q

What are suspended solids

A

Portion of the total solids that can be removed/filtered out.

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11
Q

What causes true color

A

Dissolved substances, leaves, wood organic compound. Inorganics such as Fe and Mn also

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12
Q

What causes apparent color

A

suspended materials in water.

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13
Q

What causes taste and odor compounds

A

Algae, bacterial degradation of algae

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14
Q

What is the Threshold odor number TON

A

The greatest dilution at which no odor is detected

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15
Q

What is DO concentration (Dissolved oxygen)

A

Important parameter for assesssing water quailty. It is a function of temperature , salinity, and pressure. DO increases as temp decreases

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16
Q

How much DO should lakes and river have

A

5-6 mg/L

17
Q

What is biochemical oxygen demand BOD

A

The amount of DO that is needed for microorganisms to decompose materials in water.

18
Q

What is MW of C5H7O2N and 5O2

A

C5H7O2N=113 5O2= 5x32=160

19
Q

how much oxygen is needed to oxidize 1 chem compound such as C5H7O2N

A

1.42g/1g chem comp

20
Q

What is typical BOD of domestic and industrial wastewater

A

dom-200mg/L Indust- 1500mg/L

21
Q

How does the COD test work

A

Measures the oxygen equivalent of organic matter using a stong oxidizing agent in an acidic environment The amount of oxygen required is the amount of oxidation material consumed..

22
Q

what is ph range and meaning

A

0-14, 7 neuteral above is alkaline below is acidic

23
Q

What are the 3 US drinking water standards

A

Maximum Contaminate level, Primary drinking-enforcable health approved standards, secondary drinking standards- non enforable based on aesthetic.

Environmental Science (21 decks)

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