Safety

Safety discussion

Viewpoint

Viewpoint:SCIENTIST

In our project, we examined the use of Cadmium (Cd) and Zinc (Zn) to confirm whether the lengthened metallothionein combined with heavy metals. To use their metals safely, we discussed the potential dangers and how to treat them, with our team members and some professors.

First, Cd is harmful to living things, so one of our members anticipated giving damage to health of experimenters, causing pollution, and destroying ecosystem. But the damage to health of experimenters will not happen unless Cd enters the body through our mouths, and the pollution and the destruction of ecosystem do not happen when waste liquors are disposed following the standard rules, so there are no possible happening these problems.

Second, the lack of Zn causes the taste disorder, but on the other hand, excessive quantity of Zn is needed to cause symptoms of poisoning. So we considered that the dangers from Zn had almost nothing.

Now, experiments are conducted in consideration of safety, but the pollution from chemical materials may happen in the following cases:

In the case that…

• the polyethylene tanks to put the waste liquors into crack
• waste liquors attach to tubes, tips, and the water to wash with something
• disasters like earthquake happen (especially in Japan)
• someone who do not know about our experiment touches chemical reagents in the same laboratory
• desks or doors are touched unconsciously by the hands which have touched danger materials
• the dangers or characteristics about chemical reagents such as the contents of kits are not understood

To reduce the dangers in these cases, the following things are conducted in practice:

• the polyethylene tanks to put the waste liquors into crack
  →To prevent the waste liquors from flowing out to balcony or overflowing due to the rainwater, we set the trays under the tanks and store in covered containers.
• waste liquors attach to tubes, tips, and the water to wash with something
  →The resources polluted from waste liquors are collected in the prescribed position.
• disasters like earthquake happen (especially in Japan)
  →If rivers flood, the first floor can be submerged under the water, so laboratories are usually equipped on the first floor. If disposal facilities are destroyed, there is no help for it.

Next, to reduce the dangers in these case, the following things are considered to be effective:

• someone who do not know about our experiment touches chemical reagents in the same laboratory
  →All who use the same laboratory should understand the materials used in mutual works and the dangers of them.
• desks or doors are touched unconsciously by the hands which have touched danger materials
  →We should notice that we use dangerous materials.
• the dangers or characteristics about chemical reagents such as the contents of kits are not understood
  →To prevent dangerous chemical reagents from being disposed without being noticed that it is danger, we should make sure of the contents of the chemical reagents in the kits precisely. Users should understand the characteristics of their materials (for example, it is possible that toxic gas will be generated due to the release of weak acids) fully, and, use or dispose them on the premise that we understand their dangers.



Finally, we could not find how to resolve in the following cases:



• disasters like earthquake happen (especially in Japan)
  →If disposal facilities are destroyed, it is possible that toxic materials will flow out. The methods to prevent damages have still being looked for.
  →We should always pay attention to the strength of disposal facilities and the inspection of them, and renew them. And we should assume the unexpected things.



Viewpoint:ARTIST