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Chemical spills

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All staff and students are responsible for knowing where the spill kits are stored ... Use absorbent material to soak up the neutralized spill ... – PowerPoint PPT presentation

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Title: Chemical spills


1
Chemical spills
  • Spill cleanup and waste disposal

2
Cleanup responsibility
  • All staff and students are responsible for
    knowing where the spill kits are stored
  • All staff working in the laboratories are
    responsible for ensuring spills are cleaned
    correctly and efficiently
  • Any deviations from this must be reported using
    an incident report to the laboratory manager

3
Spill types
  • Biohazard spills
  • Acid spills
  • Alkaline spills
  • Organic solvent spills
  • Inorganic salt spills
  • Mercury spills
  • Water spills

4
Biohazard spills
  • Any spill involving hazardous biological
    materials, eg. Cultures of micro-organisms,
    blood, urine, saliva etc.

5
Biohazard spill cleanup
  • Alert people in the immediate area
  • Make sure you are wearing correct PPE
  • Squirt the spray bottle of 10 v/v sodium
    hypochlorite around the edge of the spill and
    work towards the middle. Avoid splashing.
  • Leave for 10 minutes contact time
  • Use paper towels to wipe up the spill, working
    from the edges into the centre.
  • Place paper towel in a biohazard bag

6
Biohazard spill cleanup
  • Clean the area with 70 ethanol and then fresh
    paper towel, dispose of the paper towel in
    biohazard bag.
  • If the spill is on a lab gown, remove the gown
    immediately and place in a fresh biohazard bag
    for sterilization. Wash hands thoroughly after
    handling the gown
  • Report spill to technical officer
  • 10 v/v sodium hypochlorite solution must be made
    up fresh each week

7
Biohazard Waste disposal
8
Sterilization by autoclaving
pipettes
PPE and other items
glassware
9
Small Acid spills
  • Wear PPE
  • Get the acid spill kit
  • Dilute acid with 2 litres of tap water using a
    bucket
  • If safe to do so, wipe up with paper towel or
    pour down the sink with large quantities of
    running water
  • If not safe, neutralise with bicarb soda,
    sprinkle around the edge of the spill and work
    your way to the middle. Wipe up with paper towel,
    wash over area with sponge and water
  • Report spill to technical officer

10
Acid spill kit
11
Large acid spills
  • Wear appropriate PPE
  • Get the acid spill kit
  • Surround the spill forming a bund with absorbent
    material
  • Work material into centre of spill
  • Prepare bicarb or KOH solution in bucket and
    neutralize absorbent material in small quantities
  • Mop floor with fresh bicarb solution
  • Dispose of neutralized material and liquid.

12
Alkaline spill kit
13
Alkaline solid spills
  • Wear appropriate PPE
  • Get the Base spill kit
  • Sweep up solid using brush and shovel and put in
    bucket of water to dissolve
  • Wash over area with water
  • Report spill to technical officer

14
Small liquid spills
  • Wear appropriate PPE
  • Dilute the spill with water
  • Wipe up with paper towel
  • Wash over area with water
  • Report spill to a technical officer

15
Large liquid alkaline spills
  • Wear appropriate PPE
  • Get the Base spill kit
  • Neutralize spill with vinegar by gently pouring
    around the spill working into the middle of the
    spill.
  • Use absorbent material to soak up the neutralized
    spill
  • Dispose of absorbent material and wash area with
    water
  • Report the spill to the tech officer

16
Organic Solvent spill kit
17
Organic solvent spills
  • Clear the room of personnel
  • Wear appropriate PPE
  • Turn off any sources of ignition and all
    electrical equipment
  • Get the organic solvent spill kit
  • Sprinkle absorbent material around the spill and
    sweep towards the centre of the spill, allow the
    entire spill to absorb
  • Sweep up with brush and pan and place material
    into a metal container, put in a fume cupboard
    and turn on the fan
  • Stay out of room for 15 20 minutes
  • Report to tech officer

18
Hazard issues
  • Corrosive materials
  • Vapours
  • Toxic materials
  • Flammability
  • Contamination
  • Heat of reaction

19
Corrosive materials
  • Dont store acids with alkalis
  • Neutralise corrosive spills
  • Wear acid resistant soled footwear
  • In general, never mix acids with alkalis

20
Vapours
  • Where vapours are generated, always ensure good
    ventilation available
  • Use fumehoods
  • Ensure storage areas are well ventilated
  • If necessary use appropriate PPE

21
Toxic materials
  • Use safer alternatives
  • Never eat or drink in the laboratory
  • Store in secure areas
  • Avoid contamination

22
Flammability
  • Avoid ignition sources
  • Store away from oxidising agents
  • Always have a fire extinguisher handy

23
Contamination
  • Remove and clean contaminated clothing
  • Dont use unlabelled substances
  • Use good hygiene practises
  • Never allow food or drink in the laboratory

24
Heat of reaction
  • Research the use of unfamiliar substances
  • Use small amounts when mixing reactive agents
  • Use appropriate containers
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