Acid spills, cleaning

Training persoimel in the proper inetliods for clean up of an acid spill... 

Good housekeeping practices will assure the safest working conditions in the laboratory. Always clean up spilled chemicals do not leave broken or chipped glassware lying around and put away all chemical bottles and apparatus when finished with them. Neutralize acid spills with sodium bicarbonate and alkali spills with boric acid. Mercury spills should be vacuumed up with a suction flask or dusted with sulfur powder. Clean up the mercury thoroughly because mercury vapors from fine droplets are highly toxic. 

SPILL CLEAN-UP Ventilate area of spill or leak absorb small quantities on paper towels and cautiously evaporate in a fume hood absorb large quantities in sand or inert absorbent for proper disposal in a high-temperature incinerator equipped with hydrochloric acid scrubber remove all ignition sources. 

SPILL CLEAN-UP ventilate area of spill use a specialized charcoal-filtered vacuum o suction pump to collect all visible material sprinkle the entire area of the spill with elementa zinc powder use a 5-10% sulfuric acid solution to dampen the zinc powder to create a paste-liki consistency after paste dries to a light gray color, it may be swept up and disposed of properly residual material is removed with soap and water. 

SPILL CLEAN-UP use water spray to cool and disperse vapors cover spills with soda ash and spray with water neutralize with hydrochloric acid and pass into drain with sufficient amounts of water remove all ignition sources. 

SPILL CLEAN-UP Dampen solid spill material with 5% acetic acid, then transfer to a suitable container use absorbent paper dampened with 5% acetic acid to pick up any residue material wash all contaminated surfaces with 5% acetic acid followed by washing with a soap and water solution. 

SPILL CLEAN-UP Approach release from upwind flush spill with flooding quantities of water neutralize with caustic acid solution and isolate for proper disposal remove all sources of ignition,... 

SPILL CLEAN-UP dissolve in 6M hydrochloric acid and filter neutralize with 6M ammonium hydroxide and precipitate with excess sodium carbonate filter, wash, dry, and ship to supplier install exhaust ventilation to reduce dust concentration. 

SPILL CLEAN-UP ventilate area of spill or leak sweep spilled substance into suitable containers, using a method that does not generate dust dilute residues from spills with water, or neutralize with dilute acid such as acetic, hydrochloric or sulfuric absorb neutralized caustic residue on clay, vermiculite or other inert substance and package in a suitable container for disposal. 

SPILL CLEAN-UP ventilate area of spill shovel spilled material into suitable dry containers and place in a secured sanitary landfill use water spray to control dust wash liquid spills with buffer or mild acid solution neutralize with natural carbon dioxide and precipitate calcium carbonate. 

SPILL CLEAN-UP ventilate area of leak or spill shovel into suitable dry container and deposit in sealed containers for proper disposal absorb liquid containing chromic acid or chromates in inert materials, such as dry earth, sand or vermiculite,... 

SPILL CLEAN-UP ventilate area of spill or leak use water spray to cool and disperse vapors dilute spills to form nonflammable mixtures, and then neutralize diluted pools with five percent sulfuric acid absorb spills involving aqueous solutions in noncombustible materials such as dry earth, sand or vermiculite remove all sources of ignition. 

SPILL CLEAN-UP ventilate area of leak or spill collect and containerize as much solid iodine as possible spill area may be covered with an exeess of reducing agents (bisulfate, sodium thiosulfate, or ferrous salts in 3M sulfuric acid), and then neutralize with soda ash collect slurry into approved containers remove all sources of ignition. 

SPILL CLEAN-UP ventilate area of spill keep water away from release shovel into suitable dry container spill may be diluted with water and neutralized with 6 molar hydrochloric acid.. 

J. A. Nicol. 1987. Novel compositions and method for control and clean-up of hazardous acidic spills. International Patent 8,706,758, Nov. 5 cited in Chem. Abstr. CA 108(12) 100697Z. 

For typical laboratory spills, many of these items will not be needed, but aU of them could have a use, depending upon the type of spiU. For example, an acid spill could quickly destroy a person s shoes during the clean up, and drops of acid on a person s clothes would ruin them. Since those doing this clean up work are likely to be laboratory persormel, not only should they be protected against injury, but they also should not be expected to incur any economic loss. 

The chemicals in syringes are transported to the SCBs in kits of materials and equipment The chemical hazard from acid and base corrosive chemicals wiQ be mitigated by remote handling in the SCBs and by the sealed process hardware and glassware. -Any spills are contained in a spill tray and cleaned up with an acid spill kit in the SCB. 

A number of commercial products are available for cleaning up acid spills, and they all rely on neutralization. T ically a mixture of compounds such as calcium carbonate, magnesium oxide, and sodium carbonate is employed, often together with a dye that changes color when the acid spiU has been neutralized. 

November 9, 1987 - A leak of approximately 760 L (200 gal) of sulfuric acid occurred during transfer operations. This leak was cleaned up at the time. On December 4, 1987, it was noticed that the trench was open to the soil at the location where the leak occurred. This open area was found to be a dry well installed in 1986 when the trench was upgraded. The dry well was installed for steam trap drainage, not for containment of acid spills. An estimated 57 to 114 L (15 to 30 gal) of sulfuric acid was released to the ground (WHC 1987e). An unknown amount of contaminated soil was removed. 

If there is a spill (assuming that you know the nature of the spill, such as flammable liquid, acid, base, etc.) is this small enough to clean up yourself or do you need help (Have you been trained on spill clean-up procedures ) Was the spill inside a chemical hood, or on the floor or open benchtop Even for a small liquid spill, are the vapors safe to breathe (Spills are the most common kind of emergency encountered in laboratories.)... 

Uses Wetting agent, emulsifier, demulsifier for textile wet processing, specialty cleaners, dewatering agent for flotation cones., oil spill clean-up blends limited stability in alkaline or acidic media Properties Liq. limited water sol. 60% cone. 

Concentrated acid spills should be cleaned up as follows Wearing gloves and gobies, add dry acid neutralizer to the liquid spill in excess. Cover all the affected areas repeatedly until all liquid is absorbed. Sweep/shovel the neutralized waste into a trash container. Wash down the cleaned area with copious amounts of water. Neutralize further if necessary, using sodium bicarbonate (baking soda) or commercial neutralizer. Sweep the neutralized wastewater from the spill into the floor drain or use absorbent toweling. It is important to neutralize the acid (or base) rather than trying to relocate it prior to clean-up. 

Figure 19-3. Battery acid spilled from this rider picker battery. This requires art emergency clean-up.

The platinum wire P dipping into the mercury may be welded to a copper wire, but it is preferable to use a platinum wire sufficiently long to protrude at the top of the electrode tube. The mercury must be pure and clean in case of doubt, the mercury should be washed with dilute nitric acid and then thoroughly rinsed with distilled water. The electrode is filled with mercury so that the wide portion is half-full it is most important that no mercury is spilled into the titration vessel during the titration. After each titration the electrode is repeatedly washed with distilled water. 

Explain why barium sulfate is used in X-ray 2. Explain why using a base such as baking soda diagnosis of the gastrointestinal system. is effective in cleaning up a spill of an acid,... 

If you use an acid or base to clean your electrodes, treat both the acid or base and the electrode with caution. Wash any spills on your skin with plenty of cool water. Inform your teacher. 

Effective wastewater management in this phase of veneer and plywood production can be accomplished in part by in-plant operational changes and in part by equipment modification. For plants with hot water vats that are heated indirectly with steam coils, the discharge results from spills in loading and unloading the vat and from periodic cleaning. Plants operating in this manner need only to collect the water in small ponds or tanks and reuse it for vat makeup water. Adjustments in pH by the addition of lime or caustic soda may be required to control acidity and prevent the development of corrosion problems. 

As a source of clean energy, hydrogen is also going to be the permanent answer to another global problem caused by utilization of fossil fuels, such as the greenhouse effect, climate change, acid rains, ozone layer depletion, pollution and oil spills. 

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