week1 what is ewaste

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Information about week1 what is ewaste

Published on January 18, 2008

Author: Vilfrid

Source: authorstream.com

E-Waste Science & Technology Curriculum:  E-Waste Science & Technology Curriculum What is WEEE? Lesson Objectives:  Lesson Objectives Lesson Outline:  Lesson Outline What is E-Waste Where does it come from Where does it go How big is the problem Hazards Solutions What is E-Waste?:  Anything with a circuit board or a battery! What is E-Waste? E-waste encompasses a broad and growing range of electronic devices E-waste has become a problem of crisis proportions because of two primary characteristics: E-Waste is generated in great quantities E-Waste can be hazardous Exporting Harm: The High-Tech Trashing of Asia Feb 25, 2002 by the Basal Action Network and the Silicon Valley Toxics Coalition Pictures universal waste (ca):  Pictures universal waste (ca) Where Does E-Waste Come From?:  Where Does E-Waste Come From? Exporting Harm: The High-Tech Trashing of Asia Feb 25, 2002 by the Basal Action Network and the Silicon Valley Toxics Coalition PCs are major contributors because they rapidly become obsolete E-Waste is generated by three major sectors in the U.S. Individuals and small businesses Large businesses, government, and institutions Original equipment manufacturers (OEMs) Slide8:  Cadmium in batteries Lead in solder joints Plastics in cables PWB Anatomy:  PWB Anatomy How much E-Waste?:  How much E-Waste? How Much E-Waste Generated:  How Much E-Waste Generated 500 million U.S. computers 1997-2007 6.32 billion pounds plastics 1.58 billion pounds lead <13% reused or recycled ~3 million tons to landfills/year (1997) 130 million cell phones, batteries, chargers (65,000 tons/yr, 2005) 6000 obsolete PCs/day in California Potential $1 billion cleanup cost (over 5 years) No estimates on CRT to HD, flat screen TVs pictures:  Photo courtesy of Recycling Council of Ontario pictures pictures:  Photo courtesy of Recycling Council of Ontario pictures E-Waste Hazards:  E-Waste Hazards Heavy metals (lead, mercury, cadmium) Batteries containing cadmium Cathode ray tubes with lead oxide & barium Brominated flame-retardants on printed circuit boards, cables and plastic casing. PVC-coated copper cables and plastic cases Mercury in switches and flat screens Poly Chlorinated Biphenyl’s (PCB’s) in older capacitors & transformers What Hazards Does e-Waste Present?:  What Hazards Does e-Waste Present? Several pounds of toxic heavy metals in most computer systems Lead and cadmium in circuit boards and CRT monitors Mercury in switches and LCD monitors Cadmium in computer batteries Toxic metals can leach into groundwater when landfilled or improperly disposed of What Hazards Does e-Waste Present? (cont.):  What Hazards Does e-Waste Present? (cont.) PCBs in older transformers and capacitors Flame retardants on printed circuit boards, plastic casings, cables, and PVC cable insulation Toxic dioxins and furans released by burning Hazardous Waste:  Hazardous Waste Contains carcinogens… Catches fire easily Is reactive or unstable… Corrodes metal containers http://www.learner.org/exhibits/garbage/hazardous.html Where Does E-Waste Go?:  Where Does E-Waste Go? Storage Landfill & Incineration Reuse Domestic Recycling Prisons Export to Developing Countries Where Does E-Waste Go?:  Majority of waste electronics disposed in landfills Heavy metals may eventually leach into groundwater CRTs banned from landfills in CA and MA 50 - 80% of waste electronics collected for recycling in the U.S. is exported overseas Most electronics recyclers export some portion of their waste electronics overseas Frequent destinations: developing countries Where Does E-Waste Go? Landfill Hazards:  Landfill Hazards Leaking landfills Leaching into soil and groundwater Chemical reactions Vaporization Uncontrolled fires Incineration Hazards:  Incineration Hazards Dioxin formation Heavy metal contamination Contaminated slag, fly ash, and flue gases Fate of Exported Waste Electronics:  Only most valuable components reclaimed; other potentially recyclable materials discarded Components often physically dismantled by hand Some components (chips, connectors) processed in acid Handlers often lack proper protective equipment Leftover liquid dumped into water sources Fate of Exported Waste Electronics Fate of Exported Waste Electronics (cont.):  Open burning of wires and other electronics components Wire insulation contains PVC or flame retardants Non-recyclable materials dumped along waterways, in open fields, etc. Plastic that is impure, has unmatchable color, etc. Leaded CRT glass Burned or acid-treated circuit boards Fate of Exported Waste Electronics (cont.) Is Waste Hazardous (Ca)?:  Is Waste Hazardous (Ca)? CA requires waste generators to determine Generally, yes if Toxic Ignitable Corrosive Reactive Special Procedures to determine determining LCD, plasma display hazards Classification of Hazards:  Classification of Hazards Hazardous Universal Carcinogen Toxic Hazards in E-Waste:  Hazards in E-Waste E-Waste Derivatives:  E-Waste Derivatives Discuss the issue of excess packaging. Get the kids thinking about why they have to have the toy that comes in three boxes instead of the one with a price sticker on it. Batteries Recycling Electronics:  Recycling Electronics Obsolete electronics have low resale value Most contain hazardous substances And some valuable metals Recycling saves resources and the environment Hazardous Waste Solutions:  Hazardous Waste Solutions Waste Management: Minimize Impact Waste Prevention: Minimize the Volume Reduce waste and pollution Reuse as many things as possible Recycle and compost as much waste as possible Chemically or biologically treat or incinerate Bury what is left http://www.learner.org/exhibits/garbage/hazardous.html Integrated Waste Management:  Integrated Waste Management Source Reduction Recycling Waste combustion and landfilling U.S. Environmental Protection Agency, Consumer Handbook for Reducing Solid Waste, www.epa.gov, 7-15-05 Four Basic Principles:  Four Basic Principles Reduce Reuse Recycle Respond

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