Hazardous and Toxic Waste

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Hazardous and Toxic Waste

  1. 1. Ang susunod na programa ay rated
  2. 2. HAZARDOUS AND TOXIC WASTES
  3. 3. Hazardous wastes Hazardous waste – those are capable of harming people and the environment (acidic resins, arsenic, heavy metals, organic solvents, pesticides and radioactive materials.
  4. 4. EXAMPLES OF HAZARDOUS WASTE CAR BATTERIES PESTICIDE LIGHT BULBS USED MOTOR OIL
  5. 5. Toxic waste Toxic waste is waste material that can cause death, injury or birth defects to living creatures. It spreads quite easily and can contaminate lakes, rivers, and the atmosphere.
  6. 6. EXAMPLES OF TOXIC WASTE Dioxins: - Produced by burning chlorine- containing substances, plastics; the manufacture of iron and steel, and some organic chemicals. Heavy metals: - Widespread industrial use, such as in cadmium and nickle plating. Found in batteries (mercury, cadmium, lead) and leaded petrol. Radioactive waste: - By-product of nuclear power generation and used in medicine (e.g. cancer therapy).
  7. 7. Methods of disposal 3 - Recycling 1 - Landfill 2 - Incineration
  8. 8. Landfill - The disposal of refuse and other waste material by burying it and covering it over with soil.
  9. 9. Sanitary Landfills
  10. 10. Sanitary Landfill
  11. 11. Hazardous Waste Landfill Bulk waste Impervious clay Earth Water table Groundwater Clay cap Gas vent Topsoil Earth Sand Plastic cover Impervious clay cap Leak detection system Reaction wastes in dreams Double leachate collection system Plastic double liner Groundwater monitoring well
  12. 12. Incineration Incineration is a disposal method in which solid organic wastes are subjected to combustion so as to convert them into residue and gaseous products. This method is useful for disposal of residue of both solid waste management and solid residue from waste water management. This process reduces the volumes of solid waste to 20 to 30 percent of the original volume. Incineration and other high temperature waste treatment systems are sometimes described as "thermal treatment". Incinerators convert waste materials into heat, gas,steam and ash.
  13. 13. Waste-to-energy Incinerator
  14. 14. Recycling Recycling is a resource recovery practice that refers to the collection and reuse of waste materials such as empty beverage containers. The materials from which the items are made can be reprocessed into new products.
  15. 15. How can we shrink the waste stream so we don’t have to rely on disposal methods? REDUCE! REUSE! RECYCLE! In that order…
  16. 16. REDUCE Buy foods with less packaging Bring your own bags for carrying groceries- no paper OR plastic Bring your own bottles/cups Look for products that use fewer toxins If choosing between glass, metal or plastic- choose glass or metal Preferred Hierarchy: No packaging Minimal packaging Reusable packaging Recyclable packaging Compost your yard waste & kitchen scraps If using plastic use photodegradable or biodegradable plastic Cons: Don’t go away completely May add toxins to soil Never decompose in sanitary landfill People may think littering is OK
  17. 17. REUSE  Reuse/resell things that are still good  Auto parts sold thru junkyards- demanufacturing  Salvage parts (doors, stained glass) from old buildings  Some areas provide money to return bottles for refilling  Donate clothing/toys to charities that will sell them for money  Preferred over recycling because material doesn’t have to be reprocessed
  18. 18. RECYCLE Reprocessing of discarded materials into new, useful products.  Recycle glass into other glass products  Recycle tires into rubberized road surfacing  Problems:  Plastic recyclables can be contaminated by one PVC bottle in a truckload  Plastic recycling is down 50% b/c so many people consume these bottles on the go.  Benefits:  Saves water, energy, raw materials, land space  Lowers demand for raw resources- less deforestation, mining  Producing aluminum from scrap instead of bauxite ore cuts energy need by 95%  Reduces pollution  Makes one think about waste they produce  Cut waste volumes & reduce pressure on landfills  Reduces litter problems
  19. 19. Why Is Reusing and Recycling Materials So Important?  Reusing items decreases the use of matter and energy resources and reduces pollution and natural capital degradation; recycling does so to a lesser degree.
  20. 20. THE END
  21. 21. THANK YOU !
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