7. acid rain.ppt

8/10/2019 7. Acid Rain.ppt

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EGEE 102 Energy Conservation

And Environmental Protection

Acid Rain


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What is Acid rain?

http://www.epa.gov/airmarkets/acidrain/index.htmlwhat


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Acidity- p !cale


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!o"rces o# !$2

Emissions in 1%%2

Total emissions - 22.7 Million tons in 1992


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!o"rces o# &$'- 2()2 *

tons in 1%%2

$n a glo%al scale& agricultural practices contri%uteapproximatel' (0 percent o) anthropogenic nitrous oxide


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E##ects o# Acid Rain


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Regions A##ected

Several regions in the U.S. were identifed ascontaining many o the surace waters sensitive toacidifcation. They include

the Adirondac,s and Cats,ill *o"ntains in &e .or,state/

the mid-Appalachian highlands along the east coast/

the "pper *idest/ and mo"ntaino"s areas o# theWestern nited !tates)

n areas li,e the &ortheastern nited !tates/ here

soil "##ering capacity is poor/ some la,es no havea p val"e o# less than 3) $ne o# the most acidicla,es reported is 4ittle Echo Pond in 5ran,lin/ &e.or,) 4ittle Echo Pond has a p o# 6)2)


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E##ect on A7"atic 4i#e


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E##ect on *aterials

Acid rain and the dry deposition oacidic particles contribute to the

corrosion o metals (such as bronze)and the deterioration o paint andstone (such as marble and limestone).These eects seriously reduce the

value to society o buildings! bridges!cultural ob"ects (such as statues!monuments! and tombstones)! andcars
http://www.epa.gov/airmarkets/acidrain/effects/carcoatings.htmlhttp://www.epa.gov/airmarkets/acidrain/effects/carcoatings.html


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n example o) acid precipitation damage to an outdoor statue. he statue& made o) porous sandstone& was created in 1(02 as

part o) the ga%le o) the entrance o) the astle at erten& near eclinhausen& German'. he le)t photo& taken in 1,0+& shows

some stains and the loss o) the le)t hand& %ut most o) the )ace and right hand were intact a)ter 20* 'ears o) exposure. he

right photo& taken in 1,*,& shows the loss o) most o) the detail o) the statue over *1 'ears


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8isiility

Sulates and nitratesthat orm in theatmosphere rom sulurdio#ide (S$%) andnitrogen o#ides (&$#)emissions contribute tovisibility impairment!meaning we can't seeas ar or as clearly

through the air. Sulateparticles account or to * percent o thevisibility reduction


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"man ealth

+levated levels o fneparticles increaseillness and premature

death rom heart andlung disorders! suchas asthma andbronchitis.

reducing the nitrogen

o#ides available toreact with volatileorganic compoundsand orm ozone


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ndivid"al Action

Turn o lights! computers! and other appliances when you'renot using them

Use energy e,cient appliances- lighting! air conditioners!heaters! rerigerators! washing machines! etc.

$nly use electric appliances when you need them.

eep your thermostat at /01 in the winter and *% 1 in thesummer. 2ou can turn it even lower in the winter and higher inthe summer when you are away rom home.

3nsulate your home as best you can.

4arpool! use public transportation! or better yet! wal5 orbicycle whenever possible

6uy vehicles with low &$#emissions! and maintain all vehicles

well.


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EPA9s Action

+7A's Acid 8ain 7rogramlimits! or9caps!9 sulur dio#ide (S$%)

emissions rom power plants at0.: million tons annually! allowsthose plants to trade S$%

allowances! and reduces nitrogeno#ide emission rates.
http://www.epa.gov/airmarkets/arp/overview.htmlhttp://www.epa.gov/airmarkets/arp/overview.html


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7. acid rain.ppt

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