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Describe Biodeterioration

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biodeterioration, textiles biodeterioration, timber biodeterioration, fuels biodeterioration, glass biodeterioration, stone biodeterioration, concrete biodeterioration, rubber biodeterioration, metal …

biodeterioration, textiles biodeterioration, timber biodeterioration, fuels biodeterioration, glass biodeterioration, stone biodeterioration, concrete biodeterioration, rubber biodeterioration, metal biodeterioration, control of biodeterioration, prevention of biodeterioration

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  • 1. Describe BIODETERIORATION b.stev
  • 2. AN undesired change to the property in material/s caused by SOME organisms The impact on the materials listed and a method of prevention follow metals What is it? timber glass concrete rubber textiles stone fuels
  • 3. MOIST wood CAN grow cellular fungus ROT : dark brown spots INSECTS: termites/ boers gnaw MARINE BOERS: piles of the structures : hulls of wooden ships/ boats MOLDS: threat in damp regions MICROBES: draw at the wood
  • 4. TIMBER TREATMENT necessary to sustain wood
    • CUT LOGS converted timber
    • preservative spray: 2-3 mths storage
    • PESTICIDES: vacuum under pressure
    • most common treatment/s:
    • BORON (pink) ‏
    • PERMETHRIN PLUS (blue) ‏
    • WOOD manufactured: exposure LIFE
    (NZ timber preservation council, 2004)
  • 5. ALL stages: process & storage FUNGI: most common biodeteriorant Causes : - breaks in the molecules - elongation of thread - loss in strength - discolouration TEXTILES
  • 6.
    • resist light /humidity
    • affinity to fabric
    • low toxicity
    • colour - less
    • odour - less
    • cost effective
    BIOCIDES used need ability:
  • 7. (Studentsguide.in, 2008)
  • 8. H 2 O in fuel systems allows microbe growth CAUSES ECONOMIC LOSS & IS HAZARDOUS ‏ fuels:
  • 9. & are microbes THAT CAUSE THESE DEFECTS : ALSO : a fungus in KEROSENE Hormoconis resinal Psuedomonas Desulfovibrio some MOULDS thrive > stickiness ( viscosity ) : roads/ asphalt / pipe linings
  • 10. organoboron isothiazolones can be added: controls bio-deterioration > FUEL AVIATION fuels tanks drained before flight this rids collected H2O carries microbes (Institute for energy and environment, 2008)
  • 11. Glass
  • 12. GLASS made with : silica sand - silica(silicon dioxide) soda ash - sodium carbonate limestone - calcium carbonate (Martin.S.V, 2001)
    • PREVENT CORROSION
    • WASH regularly to maintain:
    • Sponge rub & hot soapy water
    • Soft bristles ALSO if needed
    • Wipe clean with rubber slide
  • 13. Stone Biodeteriorants to stone are: Microbes, Fungi, Algae, Lichens & Mosses WET/DRY cycles of the TROPICS : loosens & fragments stone. THEN - IS susceptible to biochemical factors
  • 14. Detachment of materials Black/brown crust Exfoliation Plant roots cause damage Discolouration White/gray powder White fluoroescence Stains Patches Pitting Cracks SHOW as:
  • 15. ERADICATION is in 2 STEPS: one week: KILLS growth BRUSH off - bristle brush. TREATMENT: inhibit growth.
  • 16. New TO PRESERVE NEW cleaned stone: pre-treat BIOCIDE & H 2 O repellent
    • INHIBITS ATTACK :
    • drainage systems
    • periodic cleaning
    • And resurfacing.
    • ADD TOXIC SOLVENTS
    • cleaning : scours off grime
    • cleaning : add BIOCIDE
    • > dibutyltin dilaurate
    (Kumar. R. and Kumar. A.V, 1999)
  • 17. PROTECTIVE COATINGS & BIOCIDES ARE USED
    • 3-5% fluorosilicate acid painted/ sprayed
    • 45-50% solution - white spirit
    • applied 1/2 coats : BIOCIDAL
    • 4-6% solution - synthetic resins ie:
    • polyesters/ epoxides : FUNICIDAL
    (NAHB Research Center , 2008) Concrete
  • 18. ALSO USED : COPPER NAPTHALENE PENTACHLOROPHENOL POROUS / H 2 O -SATURATED CONCRETE - SCALES the H 2 O inside freezes H 2 O carries many CHEMICALS acids/ sulfates/ chlorides
  • 19. INSULATIVE ELECTRICAL CABLE DECAY IS A HAZARD BURIED CABLES: electrical, communication, sealing rings of sewage pipes (Students guide.in, 2008)
  • 20. Metals: corrosive (Students guide.in, 2008)
  • 21. Bibliography Martin.S.V. (2001). How glass is made . Retrieved August 26, 2008, from http//:www.texas glass .com/ glass _facts/How_ Glass _ made .htm Maruthamuthu .S. (2008). Role of air microbes on atmospheric corrosion . Retrieved August 26, 2008 from http//: www.ias.ac.in/currsci/f eb102008/359.pdf NAHB Research Center . (2008). Can water cause deterioration of concrete . Retrieved August 28, 2008, from http//: www.toolbase.org/Toolbase Resources/level4FAQ.aspx?ContentDetailID=3547&BucketID=5& =25 - 18k Forest Research NZ. (2008). Timber preservation. Retrieved August 19, 2008 from, http//: www.nzic.org.nz/ChemProcesses/forestry /4B.pdf -
  • 22. Kumar. R. and Kumar. A.V. (1999). Biodeterioration of stone in tropical environments . Retrieved August 19, 2008, from http//:www.getty. edu/conservation/publications/pdf_publications/biodeterioration.pdf Institute for energy and environment. (2008). Microorganisms that convert hydrocarbons to natural gas . Retrieved August 15, 2008, from http//: www. poweronline.com/article.mvc/Microorganisms-That-Convert- Hydrocarbons-0001 - 31k - ASTM International. (2008). Standard guide for microbial contamination in fuels . Retrieved August 15, 2008, from http//: www.astm.org/Standards /D6469.htm NZ timber preservation council. (2004). Hazard class description . Retrieved August 23, 2008, from http//: www.nztpc.co.nz/hazardClass Description.php
      • Wood processors association of NZ. (2008). Timber Treatment . Retrieved
      • August 23, 2008, from http//: www.wpa.org.nz/Site/Issues/ Timber
      • _Treatment.aspx - 9k -
  • 23. Students guide.in. (2008). Biodeterioration, microbial deterioration, microorganisms, enzymes . Retrieved September 6, 2008, from http//:www.studentsguide. in/microbiology/biodegradation-bioremediation- biodeterioration / biodeter ioration .htm Morton. G. (2003). Aug 03 101 156 . Retrieved September 6, 2008, from http//: www.sgm.ac.uk/pubs/micro_today/pdf/080301.pdf