Describe Biodeterioration

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Published on November 5, 2008

Author: b.stev

Source: slideshare.net

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

Describe BIODETERIORATION b.stev

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

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

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)

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

ALL stages: process & storage FUNGI: most common biodeteriorant Causes : - breaks in the molecules - elongation of thread - loss in strength - discolouration TEXTILES

resist light /humidity affinity to fabric low toxicity colour - less odour - less cost effective BIOCIDES used need ability:

resist light /humidity

affinity to fabric

low toxicity

colour - less

odour - less

cost effective

(Studentsguide.in, 2008)

H 2 O in fuel systems allows microbe growth CAUSES ECONOMIC LOSS & IS HAZARDOUS ‏ fuels:

& are microbes THAT CAUSE THESE DEFECTS : ALSO : a fungus in KEROSENE Hormoconis resinal Psuedomonas Desulfovibrio some MOULDS thrive > stickiness ( viscosity ) : roads/ asphalt / pipe linings

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)

Glass

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

PREVENT CORROSION

WASH regularly to maintain:

Sponge rub & hot soapy water

Soft bristles ALSO if needed

Wipe clean with rubber slide

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

Detachment of materials Black/brown crust Exfoliation Plant roots cause damage Discolouration White/gray powder White fluoroescence Stains Patches Pitting Cracks SHOW as:

ERADICATION is in 2 STEPS: one week: KILLS growth BRUSH off - bristle brush. TREATMENT: inhibit growth.

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)

INHIBITS ATTACK :

drainage systems

periodic cleaning

And resurfacing.

ADD TOXIC SOLVENTS

cleaning : scours off grime

cleaning : add BIOCIDE

> dibutyltin dilaurate

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

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

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

INSULATIVE ELECTRICAL CABLE DECAY IS A HAZARD BURIED CABLES: electrical, communication, sealing rings of sewage pipes (Students guide.in, 2008)

Metals: corrosive (Students guide.in, 2008)

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 -

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 -

Wood processors association of NZ. (2008). Timber Treatment . Retrieved

August 23, 2008, from http//: www.wpa.org.nz/Site/Issues/ Timber

_Treatment.aspx - 9k -

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

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