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Everything 'bout Me and My Self

On Selasa, 06 April 2010 1 komentar


An Aroostook County, Maine, teacher elects to dispose of one quarter pound of potassium metal by attaching the container to a long wooden stick and dumping it into a metal waste basket full of water in the school parking lot. The resulting explosion sends shrapnel flying and does minor damage to cars in the parking lot. Miraculously no one was injured. (Personal communication, July, 1988)

A Connecticut High School teacher substituted mercuric oxide for silver oxide in an experiment. Twenty-two students working in pairs heated 1.75 grams over a Bunsen burner for 15 minutes. After massing the heated material the teacher realized that the mercury was being vaporized and the students were evacuated. Three days after the incident, testing of the students revealed 8 of them had elevated mercury in their urine. Three months later one student still had elevated mercury levels. (Morbidity and Mortality Weekly Report, CDC, March 18, 1988)

A students gains access to a storage room and deliberately breaks a mercury barometer. The cost of the cleanup and disposal exceeds $5000. (Personal communication, May, 1998)

A student at a health career fair squeezes the bulb on a mercurial sphygmomanometer until mercury spurts out the top of the apparatus. The cost of the cleanup and disposal exceeded $1500. (Personal communication, February, 1999)

A 14-year old boy put potassium dichromate in a bottle of soda two students were sharing in a physical science lab. The two students became seriously ill and were rushed to a hospital. Reported by Dr. Waren Kingsley in Chemical Health and Safety, March/April 1999, volume 6, number 2, p.48.

The following incidents are abstracted from Dr. Jay Young’s column Anecdotal Accidents which appears in each issue of Chemical Health and Safety published by the American Chemical Society and the ACS Division of Chemical Health and Safety, 1155 16th St., N.W., Washington, D.C. 20056.

1. A student received minor facial injuries when she added concentrated sulfuric acid to a wet test tube provided by her lab partner. The contents boiled out of the tube a struck her in the face. Her lab partner had not dried the tube as instructed. January/February 2000 volume 2, number 1, p. 4

2. One person was killed and another injured when a bottle of hydrofluoric acid was compacted in a garbage truck as the attendant stood by the side of the truck. March/ April 1997, volume 4, number 2, p. 7.

3. Students in a high school science lab were allowed to fill empty alcohol burners using a funnel and a container of alcohol located on a side bench. When the funnel was misplaced, students began filling the burners directly from the container. Alcohol was spilled on the lab bench. When a student approached the bench with a still glowing burner a fire ensued in which the alcohol container was knocked over and a student was drenched in alcohol. The student was eventually knocked to the floor and the flames extinguished. Unfortunately it was too late and the student died of her burns. /October 1995, volume 2, number 5, p.5.

4. The first recorded case of a fatality from ingestion of sulfuric acid occurred when a teenager drank what he thought was milk. Someone had placed sulfuric acid in a cardboard milk carton which is lined with a chemically resistant coating. The boy died two weeks after ingesting several milliliters. September/October 1998, volume 5, number 5, p.4.

5. A carpenter who attempted to unplug a drain was found dead. A bottle of 95% sulfuric acid and an alkaline solution of sodium hypochlorite (bleach) was found at the site of the accident. From the evidence presented it was estimated the man had inhaled chlorine gas at a concentration of 25,000 ppm for 5-10 seconds. The immediately dangerous to life and health concentration (IDLH) is 30 ppm. July/August 1998, volume 5, number 4, p.4.

6. A four year old received chemical burns over 40% of his body when he slipped and fell into a spill of sulfuric acid. The custodian was using a 95% sulfuric acid drain cleaner to clean a toilet bowl. When he left to get something to clean up the cleaner he had spilt on the floor, the boy entered the rest room and slipped on the spill. The boy was washed off and rushed to the hospital but lost the use of one leg and arm. July/August 1995, volume 2, number 4, p.5.

7. Two students were severely burned when they attempted to pour methanol in a "juice cannon" which had recently been fired. The residual methanol was still burning and flashed back causing the gallon container of methanol to explode. March/April 1999, volume 6, number 2, p.5.

1 komentar:

yusafir hala mengatakan...

I like your blog. Good luck

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