School Climate & Safety

Mercury Experiments In Class Can Be Poison

By Michelle Galley — October 22, 2003 6 min read
  • Save to favorites
  • Print

Mercury and schools. The combination can make for engaging science classes, or potentially lethal consequences.

Are the risks worth the wow? The answer, increasingly, is no.

As stories about mercury spills at schools tumble across newspaper headlines, more states and districts are deciding that the educational benefits that mercury might have in lessons do not outweigh the hazards associated with handling the toxic, and enticing, element. Eleven states, at a minimum, have taken steps to rid schools of the substance through legislation or other means.

“It’s too dangerous,” declared Kenneth R. Roy, the head of the safety advisory board for the National Science Teachers Association.

When mercury—specifically, metallic mercury—is released, it breaks apart into tiny beads and releases a vapor that can cause shortness of breath, nausea, vomiting, diarrhea, and possibly death.

At least seven U.S. schools, in separate incidents, have been evacuated because of major spills so far this school year.

The latest, and possibly the most dramatic, incident happened at Ballou Senior High School in Washington this month.

After taking about half a cup of mercury from an unlocked science lab at the 1,300-student school on Oct. 2, a student shared it with some classmates, who played with the dangerous material.

The student’s actions resulted in a massive cleanup involving school district officials, the District of Columbia fire department’s hazardous-materials team, the federal Environmental Protection Agency, and the local health department.

Nearly 300 people came into direct contact with the mercury, and more than 1,200 students, teachers, and staff members at Ballou High were screened for mercury poisoning.

No one was identified as having symptoms of such poisoning, but 165 people required additional checkups as of last week, according to Briant K. Coleman, a health department spokesman.

In addition, 86 houses were tested for mercury exposure, 11 of which have shown elevated levels and will need to be decontaminated, Mr. Coleman said.

Mercury was also found on one of five public buses that city emergency workers examined and took out of service, he said.

When the cleanup will be finished and what it will cost were still up in the air last week.

Meanwhile, Ballou students are attending classes at the former Washington Convention Center and taking field trips to the capital’s landmarks and museums.

‘Anti-Social’ Element

What to do (and not do) in case of a
mercury spill

The U.S. Environmental Protection Agency has three sets of guidelines for cleaning up mercury, depending on the size of the spill. The following procedures pertain to spills that commonly occur in schools.

DO

  • Isolate the area
  • Lower the temperature.
  • Open Windows.
  • Put all contaminated material, including clothing, shoes, and bookbags, in a sealed plastic bag.
  • Notify the local fire department and public health officials.
  • If more than one pound (equal to two tablespoons) of mercury is spilled, call the National Response Center at (800) 424- 8802.


DON’T

  • Vacuum mercury
  • Sweep up mercury with a broom.
  • Pour mercury down a drain.
  • Allow children to assist with the cleanup.
  • Launder clothes that may contain mercury.
  • Walk around in shoes that may be contaminated with mercury.
  • Attempt to clean spills greater than the amount found in a small thermometer.


For more information, go to www.epa.gov/mercury

Some of the same properties that make mercury so attractive are also what make it difficult to clean up. Unlike water, which will adhere to almost anything, mercury adheres to itself. To demonstrate that principle, science teachers commonly have students compare one graduated cylinder containing water and one containing mercury, said Mr. Roy of the science teachers’ association.

The top of the water appears concave, while the mercury appears convex because the glass sides of the cylinder are attracting the water, and mercury is trying to attract itself.

“Mercury tends to be anti-social,” said Mr. Roy, who is also the safety-compliance officer for the 8,000-student Glastonbury, Conn., school district.

That self-possessed property is why, when released, mercury forms little balls that tend to roll into cracks and crevices. Trying to sweep up the beads with a broom and dustpan—a common mistake, according to Mr. Roy— only spreads the mercury around more and releases its toxic vapor.

In the case of a mercury spill, schools must immediately isolate the area around the spill and shut down the ventilation system, which can carry the vapors throughout the building. They should also call the local fire marshal, Mr. Roy advised.

Depending on the size of the spill, teachers may be able to use specially designed cleanup kits that are available from chemical-supply companies, he said.

Careful attention needs to be paid to students’ and teachers’ clothing and shoes, because mercury can attach itself to certain fibers and, as was the case in the Washington spill, travel to students’ homes.

“It is the gift that keeps on giving,” Mr. Roy said jokingly.

Even when mercury is not used in experiments or demonstrations, it can show up in school science labs in the form of such commonly used equipment as thermometers, barometers, and manometers.

Now, many supply companies are sponsoring exchange programs so that teachers can trade in their old devices for newer models that are safer and more accurate, Mr. Roy said.

Mercury is becoming so unpopular that at least 11 states—including Connecticut, Indiana, Kansas, Maine, Maryland, Michigan, Minnesota, Oregon, Vermont, Virginia, and Wisconsin— have introduced programs or passed legislation to remove the metal from schools, according to the Environmental Protection Agency.

The EPA will hold an online workshop Nov. 14 for teachers and administrators to discuss different mercury-reduction programs. More information on the Webcast can be found at www.epa.gov/mercury/classroom.htm.

“The initiatives are there,” Mr. Roy said. “Unfortunately, some behaviors are very difficult to change.”

Costly Cleanup

Ingrained behavior is exactly what complicated cleanup efforts in Onaway, Mich. Even though the 750-student district had rid its single school of mercury three years ago, this fall three students took about half a cup of mercury from an abandoned house last month, brought it to school, and spilled it in a busy hallway.

Then a well- intentioned custodian vacuumed it up, said Superintendent Robert Szymoniak. “You don’t do that,” Mr. Szymoniak emphasized. “That puts mercury vapors in the air, where it is most dangerous.”

The custodian followed what was for years the standard cleanup procedure at the school, Mr. Szymoniak said. As soon as the superintendent heard about the spill, he evacuated the school and hired a professional company to test the air and decontaminate the building.

In the end, Onaway Area School was closed for four days. The cleanup bill will amount to more than $40,000, Mr. Szymoniak said. Because the students didn’t know what they had, they were not disciplined, he said.

In response to that kind of price tag, some school administrators have decided to close down science labs altogether, Mr. Roy said.

“Let’s not throw the baby out with the bath water,” he said. Instead, Mr. Roy suggests that science teachers receive annual professional-development instruction on the topic, and that schools make their laboratories safer. (“Science-Lab Safety Upgraded After Mishaps,” April 30, 2003.)

The federal Occupational Safety and Health Administration, or OSHA, requires schools with science labs to have a chemical-hygiene plan, outlining the safety procedures and equipment employees should use when dealing with potentially dangerous chemicals. In essence, those plans promote “professional responsibility,” Mr. Roy said.

Still, he added, “most schools are handling this responsibly.”

Events

This content is provided by our sponsor. It is not written by and does not necessarily reflect the views of Education Week's editorial staff.
Sponsor
Professional Development Webinar
Disrupting PD Day in Schools with Continuous Professional Learning Experiences
Hear how this NC School District achieved district-wide change by shifting from traditional PD days to year-long professional learning cycles
Content provided by BetterLesson
Jobs Virtual Career Fair for Teachers and K-12 Staff
Find teaching jobs and other jobs in K-12 education at the EdWeek Top School Jobs virtual career fair.
This content is provided by our sponsor. It is not written by and does not necessarily reflect the views of Education Week's editorial staff.
Sponsor
Teaching Webinar
Teacher Perspectives: What is the Future of Virtual Education?
Hear from practicing educators on how virtual and hybrid options offer more flexibility and best practices for administrative support.
Content provided by Class

EdWeek Top School Jobs

Teacher Jobs
Search over ten thousand teaching jobs nationwide — elementary, middle, high school and more.
View Jobs
Principal Jobs
Find hundreds of jobs for principals, assistant principals, and other school leadership roles.
View Jobs
Administrator Jobs
Over a thousand district-level jobs: superintendents, directors, more.
View Jobs
Support Staff Jobs
Search thousands of jobs, from paraprofessionals to counselors and more.
View Jobs

Read Next

School Climate & Safety What We Know About the Nashville School Shooting Victims
The Nashville community mourned the loss of three children and three adults after a shooter attacked The Covenant School.
4 min read
A woman and child bring flowers to lay at the entry to Covenant School which has becomes a memorial for shooting victims, Tuesday, March 28, 2023, in Nashville, Tenn.
A woman and child bring flowers on March 28, 2023, to the entry to The Covenant School in Nashville, Tenn., where six people were killed in a mass shooting the day before.
John Amis/AP
School Climate & Safety 3 Students, 3 Staff Dead in Shooting at Private Elementary School in Nashville
The attack at The Covenant School was the 13th school shooting this year that resulted in injuries or deaths.
3 min read
An ambulance leaves Covenant School in Nashville, Tenn., on March 27, 2023. Officials say three adults and three children were killed in a shooting at the private Christian grade school in Nashville. The suspect is also dead after a confrontation with police.
An ambulance leaves The Covenant School in Nashville, Tenn., on March 27, 2023, after a shooting at the private Christian school killed three students and three staff members. The shooter is also dead after a confrontation with police inside the school.
John Amis/AP
School Climate & Safety School Shooting Prompts Denver to Bring Back Armed Officers
Denver's superintendent this week said he was ready to face the consequences of going against district policy following two shootings.
3 min read
Students leave East High School following a school shooting on March 22, 2023, in Denver. Two school administrators were shot at the high school after a handgun was found on a student subjected to daily searches, authorities said.
Students leave East High School following a school shooting on March 22, 2023, in Denver. Two school administrators were shot at the high school after a handgun was found on a student subjected to daily searches, authorities said.
Hyoung Chang/The Denver Post via AP
School Climate & Safety Q&A Making the Case for Schools That Don't Look Like Prisons
Claire Latané, a landscape architecture professor at Cal Poly Pomona, discusses how schools can design environments that support mental health.
6 min read
Freshmen at George C. Marshall High School in Falls Church, Va., eat lunch outside in the Senior Courtyard on March 1, 2023. The high school has three courtyards where students can access the outdoors during the day.
Freshmen at George C. Marshall High School in Falls Church, Va., eat lunch outside in the Senior Courtyard on March 1, 2023. The high school was highlighted in Claire Latané's book <i>Schools That Heal: Design with Mental Health in Mind</i> for its abundance of outdoor spaces.
Jaclyn Borowski/Education Week