Title: Industrial Activity
1CHAPTER 3
- Industrial Activity
- and
- The Environment
2Air Pollution
- Contaminants may be considered any materials
other than the permanent gases seen in air - Pollutant is any contaminant derived from
mankinds activity - Contaminants may or may not have adverse health
effects
3Air Contaminants/Pollutants
- Pollutants are legitimate concerns as they deal
with air quality, whereas contaminants may be
accepted as a part of the natural world in which
we live
4Airsheds
- analogous to watersheds
- the land area that contributes to a regions air
- and the things found in the air - far less distinct than watersheds and very large
in size - do not conform to political boundaries unless a
regional approach is taken
5Layers of Earths Atmosphere
6Global Wind Patterns
7Composition of the Atmosphere
8Air Pollutants
- Carbon monoxide
- colorless, odorless, non-irritating poison
- attaches to hemoglobin reduces oxygen carrying
capacity - results in headaches, drowsiness and asphyxiation
- Hydrocarbons
- denotes a large group of volatile organic
compounds - some are carcinogens, poison etc.
9Air Pollutants (cont.)
- Sulfur Dioxide
- colorless corrosive gas
- respiratory irritant and poison
- can result in H2SO4
- Particulates
- small pieces of solid or liquid materials
dispersed in the atmosphere - 0.005-100 um
- reduction in visibility, respiratory problems
10Air Pollutants (cont.)
- Nitrogen Oxides
- critical component for smog formation
- compounds acid precipitation problems
- Photochemical Oxidants
- products of secondary atmospheric reactions
driven by solar energy - e.g., O3, PAN, acrolein
- strong oxidants, eye irritant etc.
11Air Pollutants (cont.)
- Lead
- released as metal fumes or suspended particles
- major source was leaded gasoline
- Carbon Dioxide
- generally considered non-toxic and innocuous
- not listed as air pollutant
- increasing concentrations have been related to
global warming
12Air Pollutants (cont.)
13Air Pollutants (cont.)
- Criteria Pollutants
- are those for which federal concentration limits
have been set as the dividing line between
acceptable air quality and poor air quality - CAA 1970 designated seven major pollutants as
conventional or criteria pollutants - includes, carbon monoxide, sulfur dioxide,
hydrocarbons, particulates, nitrogen oxides,
ozone, and lead - Maximum ambient air standards have been set
- Non-criteria
- defined in different legislations
- other than designated contaminants and are toxic
or hazardous
14Comparisons
Criteria Pollutants
Hazardous Air Pollutants
- Few (7)
- not bioaccumulated
- lung is primary target (except CO)
- health effects readily available
- latent time range from minutes to months
- Numerous
- may bioaccumulate
- many target organs
- dose-response data rarely available
- long latent periods
15SMOG
- The term smog comes from a combination of the
words smoke and fog - Made up of photochemical oxidant gases
- Interaction between nitrogen oxides and
hydrocarbons in the presence of sunlight
16Acid Rain
- Rain that is more acidic than normal because it
contains sulfuric acid or nitric acid - result of SOx, NOx, acidic particulates in air
- involves all forms of acid deposition, even if
rain is not involved
17Coal Production in US
18SO2 and NOx Emissions in US
19Global Warming
- Pollutants from a small area can accumulate and
spread in the upper atmosphere and affect entire
earths weather - increase in CO2 is resulting in increase of
earths temperature - can result in melting of ice caps, coastal
flooding, shift in weather patterns, etc.
20Illustration of Some of Many Interactions That
Control The Global Climate
21Atmospheric CO2
22What is a Green House?
- Greenhouses are much warmer inside than the air
is outside because the glass is transparent to
light and allows short-wavelength light to pass
through and heat the contents of the greenhouse.
It also reflects back the longer wavelength heat
radiating within the greenhouse, thus preventing
if from passing back out.
23Greenhouse Effect In A Greenhouse
24What is Green House Effect?
- In a glass greenhouse, heat builds up and gets
trapped due to presence of carbon dioxide and
other heat trapping gases in the upper
atmosphere. - CO2 is analogous to glass.
- Earths surface analogous to floor which radiates
back absorbed energy as longer wave infrared
heat.
25Green House Effect
- Does Greenhouse effect cause warming of the
earths surface? - YES!, for without a greenhouse effect due to
gases in the atmosphere, the average temperature
of the earths surface would be 00F. - Earths surface temperature is about 600F due to
greenhouse effect.
26The Greenhouse Effect
27Effects of Major Greenhouse Gaseson Global
Warming
Percent contribution Gas to global
warming Carbon dioxide 57 Chlorofluorocarbons
25 Methane 12 Nitrous oxides 6
28Greenhouse Effect Some Questions!
- What is the effect of anthropogenic gases?
- What is the contribution to global climate
change? - Are all the effects bad?
29Concentrations And Lifetimesof Greenhouse Gases
30What Can We Do?
- Reduce Worlds Population?
- Reduce or maintain current levels of CO2 in the
atmosphere
31Contribution of CO2 Toward Global Warming
Activity Percent contribution Energy use
49 Industrial processes 24 Deforestation
14 Agriculture 13
32Ozone Depletion
- Stratospheric Ozone absorbs harmful ultraviolet
(lt340nm) radiation from the Sun - 1 loss of ozone 2 increase in UV radiation
106 extra cancers - ozone hole 7.7 million sq. miles
- CFCs HCFCs are the primary causes
33Chlorine Content in Stratosphere
34Ozone Whats Being Done?
- Montreal Protocol
- complete phase-out of CFCs by 2000
- critical need to come up with inexpensive
non-halogenated coolants - if everyone abides, ozone loss should peak
between 2001 and 2005 - ozone levels should return to normal
35Solid Wastes
- US generates
- 210 million tonnes of MSW
- 3 billion tonnes of mining wastes
- 500 million tonnes of agricultural wastes
- EPA Solid Waste definition
- any discarded material, including solid, liquid,
semi-liquid, or contaminated gaseous material
resulting from industrial, commercial, mining and
agricultural operations, and from community
activities
(all figures are per year)
36Major Sources of Solid Wastes in the U.S.
37Total Solid Waste Production in the U.S.
38Fate of Solid Wastes
39Municipal Solid Waste
- consists of residual wastes and bulky wastes such
as furniture, commercial and institutional
wastes, street refuse, dead animals, abandoned
vehicles, etc.. - 1.4 - 4.5 kg/cap-day
- in UK and European countries, this number is
reduced in half - composition depends upon many factors
40Refuse Composition (1990)
Constituent Composition () Cinders 50 A
sh 12 Dirt and dust 20 Paper, straw,
vegetable refuse 13 Miscellaneous 5
(tins, 0.7 metal, 0.2 bottles, 1.5)
41Current Composition
42MSW Whats Being Done?
- disposal of yard wastes in landfills banned
- instituting solid waste recycling programs
- developing new technologies which can
economically and effectively use all the
recyclable and collected material - developing better packaging
- encouraging use of readily recyclable materials
43Composition of MSW by Country
44Industrial Wastes
- process wastes remaining after manufacturing of a
product - commercial wastes from office activities,
cafeterias, labs, etc. - waste water sludges created during wastewater
treatment - industrial solid wastes handled more or less the
same as MSW
45Other Wastes
- Sewage Sludges
- sludges left over after treatment of wastewater
- Agricultural Wastes
- crop residues
- manure from animal feeding facilities
- Mining Wastes
- overburden materials and mine tailings
- current law requires reclamation of mining area,
which is essential and beneficial but very costly
46Sanitary Landfills
- approximately 61 of solid wastes go to sanitary
landfills - sanitary landfills are not open dumps, but rather
are engineered systems - waste is deposited in compacted layers and
covered with earth at the end of each day - have impermeable liner, leachate and gas
collection systems
47Landfills In The U.S.
48Incineration
- burns wastes, though usually not completely
- residual is about 10-20 of original material
- can cause odors, soot and other air pollutants
- may emit dioxins and furans, which are highly
toxic - residue can be much more concentrated in trace
metals, etc. and can create more difficulties for
disposal - can be used for cogeneration of energy
49Incineration of MSW
50Composting
- aerobic biological process operated under
elevated temperatures - microorganisms decompose organic carbon/wastes to
CO2, water and humus - resulting humus can be used as manure, soil
reconditioner, etc. - sometimes costs can be high and compost may be
contaminated with unwanted materials
51Resource Recovery
- can involve
- fairly simple methods like manual sorting
- very complex automated material sorting and
recovery facilities - reduces amount of disposable waste to about 1/3
52Schematic of a Typical Resource Recovery Facility
53Potential Recovery of MSW Components
54Impact of Recycling on Newsprint Prices
55Recycling of MSW in the U.S.
56Recycling of MSW in the U.S. (cont.)
57MSW Management
58Conservation
- best way to reduce waste is to reduce waste
generation or conservation - includes reducing packaging, substituting old for
new, making products more recyclable
59Hazardous Wastes
- RCRA definition
- cause or significantly contribute to an increase
in mortality or an increase in serious
irreversible, or incapacitating reversible,
illness or pose a substantial present or
potential future hazard to human health or the
environment when improperly treated, stored,
transported or disposed of, or otherwise
mismanaged
60Hazardous Wastes (cont.)
- legally, a subset of solid wastes
- has one of the following four characteristics
- Ignitability
- Reactivity
- Corrosivity
- Toxicity
- 700 million tonnes per year (hazardous)
- 11 billion tonnes per year (by other definitions
of hazardous)
61Largest Producers ofHazardous Wastes, 1990
62Superfund Sites
- abandoned disposal sites which are highly
dangerous to the environment and have passed a
point scoring system of Federal government - Love Canal
- Times Beach
63Common Contaminants At Superfund Sites
64RCRA Sites
- Current disposal sites
- covers problems caused by present working
industrial wastes
65Water Pollution
- NPDES regulates surface disposal
- 90 of total water used by industries is used for
cooling care should be taken not to contaminate
this cooling water - two case studies that bring out ill effects of
water pollution - Minimata Disease
- The Kepone Incident
66Minimata Disease
- Time 1950s
- Location small village of Minimata, Japan
- Killed/Injured 100/thousands
- Cause mercury poisoning
- Why high conc. of mercury in fish tissues
- From where mercury laden wastes from Chisso
Chemical Plant into Minimata Bay - Repair stop all inputs, dredge up all mercury
contaminated sediment
67The Kepone Incident
- Time 1975
- Location Hopewell, Virginia
- Who Was Affected and How? many workers poisoned
reported tremors, chest pains, and other problems - Cause Kepone, a very toxic synthetic chlorinated
insecticide - Why high conc. in fish tissues, air, soil, and
well water - From where process wastes discharged into the
James River - Repair shutdown of plant, banning of fishing
clean up would have costed gt 1 billion - Future Still present and will remain there for
thousands of years
Kepone
68Energy Use
- History
- Energy Consumption
- 95 comes from fossil fuels
- renewable sources contribute only 2.5
- remaining 2.5 comes from nuclear plants
- developed countries 20 population consumes 78
natural gas, 65 oil, 50 coal - US and Canada 5 population 25 of total energy
usage - US/India 300 GJ/cap-year vs. ltone barrel/cap-year
69Wood And Coal Usage
70Worldwide Commercial Energy Consumption
World Resources Institute, 1992
Year 1989
71Per Capita Energy Use And GNP
World Resources Institute, 1990
72Energy Usage In US
Changes in US Energy Consumption
Cunningham and Saigo, 1995
US Department of Energy, 1995
73Energy Flow In The U.S., 1995
(US Department of Energy, 1996)
74Energy Sources
75Coal Flow In The U.S., 1995
units million tons
(US Department of Energy, 1996)
76World Proven Oil Reserves, 1991
(World Resources Institute, 1991)
77Petroleum Flow in the U.S., 1995
units millions barrels per day
(US Department of Energy, 1996)
78Natural Gas Reserves, 1990
World Resources Institute, 1990
79Nuclear Reactors
- Boiling Water Reactors
- water used to moderate the nuclear reaction
- steam formed in the reactor is used to run a
turbine - steam contains radioactive materials and must be
treated - Pressurized Water Reactor
- water pumped past the nuclear core rods
- water gets heated to 3170C at 2235 psi
- pumped to steam generator where it heats a
separate water line producing steam which in turn
runs a turbine generator - pressurized steam may be radioactive and is
recycled to the reactor - turbine running steam is non-radioactive
80Nuclear Power Plants In The US
(US Department of Energy, 1995)
81Renewable Energy Sources
- Water Power
- Geothermal Power
- Wind Power
- Solar Power
- Biomass
82Electricity Flow In The U.S., 1994
(US Department of Energy, 1996)
83Energy Conservation
84Earths Structure
- composed of many layers
- Core dense, intensely hot molten metal, 4,000 km
in diameter - Mantle surrounds core, layer of pliable rock,
extends to 2900 km below earths crust - Crust outermost layer, floats on mantle
85Earths Composition
86Recoverable Resources
- Proven Resources
- resources that have been thoroughly mapped and
are economical to recover at current prices and
technology - Known Resources
- located but not completely mapped
- may or may not be economical at present
- Undiscovered Resources
- only speculative or inferred
87Recoverable Resources (cont.)
- Recoverable Resources
- accessible with current technology
- not economically recoverable in foreseeable
future - Non-Recoverable Resources
- so diffuse or remote that they are not ever
likely to be technologically accessible
Only 0.01 of all minerals are in upper one
kilometer of earths crust and economically
recoverable
88Categories of Natural Resources
Cunningham and Saigo, 1995
89World Consumption ofMineral Resources
90Major World Mineral Sources
Statistical Abstract of the US, 1992
91Mineral Composition
Kupchella and Hyland, 1986