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Environmental Science

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Presentation on theme: "Environmental Science"— Presentation transcript:

1 Environmental Science
Chapter 17 Solid/Hazardous Waste

2 Key Concepts Solid waste Solid waste solutions Reducing solid waste
Hazardous waste Hazardous waste regulations Hazardous waste solutions

3 Solid Waste Defn: anything discarded in solid form Sources:
Municipal garbage = 1.5% Industry and Agriculture = 97.5% Includes: mining, oil and natural gas production, agricultural activities, industrial processes Fig. 17-2, p. 390

4 Technology Revolution
Average 50-lb computer and 10-in monitor requires: ~530 lbs fossil fuel ~50 lbs chemicals ~3300 lbs water Problem: technology is advancing so fast that there is the desire/need to rapidly discard old computers for better, faster new ones Solutions: provide incentives to extend the life of computers, increase ability to upgrade computers, better recycling programs for old computers/parts

5 Technology Revolution
Development of flat screen TVs are making older CRT (cathode-ray tube) TVs obsolete Problems: Each CRT TV contains about 4 to 8 pounds of lead, cadmium, mercury and other substances which may leach into groundwater if disposed of in landfills Few parts can be resold Recycling costs about $20-30 per set Solutions: Donate to charities Internalize the cost of new TVs to fund recycling programs (ex: California, Maine)

6 Solid Waste Solutions Fig. 17-3, p. 391 1st Priority 2nd Priority
Last Priority Primary Pollution and Waste Prevention Secondary Pollution and Waste Prevention Waste Management • Reduce products • Repair products • Recycle • Compost • Buy reusable and recyclable products • Treat waste to reduce toxicity • Incinerate waste • Bury waste in landfill • Release waste into environment for dispersal or dilution • Change industrial process to eliminate use of harmful chemicals • Purchase different products • Use less of a harmful product • Reduce packaging and materials in • Make products that last longer and are recyclable, reusable, or easy to repair Fig. 17-3, p. 391

7 Pollution Prevention: Industrial Ecosystem
Sludge Pharmaceutical plant Local farmers Greenhouses Sludge Waste heat Waste heat Waste heat Fish farming Waste heat Electric Power plant Oil refinery Surplus natural gas Fly ash Surplus natural gas Surplus sulfur Waste heat Waste Calcium sulfate Cement manufacturer Sulfuric acid producer Wallboard factory Fig. 17-5, p. 393 Area homes

8 Reducing Solid Waste Sustainability six Consume less
Redesign manufacturing processes Produce less waste and pollution Repair, reuse, remanufacture, compost, and recycle Design products to last longer Eliminate, reuse, recycle, or reduce packaging

9 What Can You Do? What Can You Do? Solid Waste Fig. 17-4, p. 391
Follow the four R's of resource use: Refuse, Reduce, Reuse, and Recycle. Ask yourself whether you really need a particular item. Rent, borrow, or barter goods and services when you can. Buy things that are reusable, recyclable, or compostable, and be sure to reuse, recycle, and compost them. Do not use throwaway paper and plastic plates, cups, and eating utensils, and other disposable items when reusable or refillable versions are available. Use in place of conventional paper mail. Read newspapers and magazines online. Buy products in concentrated form whenever possible. Fig. 17-4, p. 391

10 Hazardous Waste Main sources of hazardous wastes are mining and electric power plants Legal definition: Any solid or liquid that: Contains one or more of the 39 toxic compounds above established levels; Catches fire easily; Is reactive or unstable; or Is capable of eroding metal containers Yet, this does not include such items as radioactive wastes, mining wastes or wastes from small businesses

11 Harmful Chemicals in Your Home
What Harmful Chemicals Are In Your Home? Cleaning • Disinfectants • Drain, toilet, and window cleaners • Spot removers • Septic tank cleaners Paint • Latex and oil-based paints • Paint thinners, solvents, and strippers • Stains, varnishes, and lacquers • Wood preservatives • Artist paints and inks General • Dry-cell batteries (mercury and cadmium) • Glues and cements Gardening • Pesticides • Weed killers • Ant and rodent killers • Flea powders Automotive • Gasoline • Used motor oil • Antifreeze • Battery acid • Solvents • Brake and transmission fluid • Rust inhibitor and rust remover Fig , p. 402

12 Hazardous Waste Regulation
Resource Conservation and Recovery Act of 1976 EPA identified and set standards for management of hazardous waste Companies that store, treat or dispose of more than 220 pounds of hazardous wastes per month must be permitted Companies must record all information about wastes from where it was produced to where it was disposed Superfund Act of 1980 Identifies old hazardous waste dump sites or leaking underground tanks Cleans up those sites and affected groundwater Attempts to locate responsible parties to pay for the clean-up For a list of sites by county in Florida:

13 Hazardous Waste Solutions
Bioremediation Phytoremediation Incineration Deep-well disposal Surface impoundments Secure landfills Aboveground buildings Prevention is better than disposal or cleanup

14 What Can You Do? What Can You Do? Hazardous Waste Fig. 17-20, p. 406
Use pesticides in the smallest amount possible. Use less harmful substances instead of commercial chemicals for most household cleaners. For example, use liquid ammonia to clean appliances and windows; vinegar to polish metals, clean surfaces, and remove stains and mildew; baking soda to clean household utensils, deodorize, and remove stains; borax to remove stains and mildew. Do not dispose of pesticides, paints, solvents, oil, antifreeze, or other products containing hazardous chemicals by flushing them down the toilet, pouring them down the drain, burying them, throwing them into the garbage, or dumping them down storm drains. Fig , p. 406

15 Let’s Compare Counties…
Osceola Orange Tons of Garbage* 233,470 1,216,502 Recycling Rate* 16% 30% Single-family Curbside Recycling* 2% 90% Commercial Recycling* 0% Number of Superfund Sites 3 *Latest figures from 2001 Florida DEP website

16 Any Questions?

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