Experiement 1: Lava rock can capture carbon dioxide.
Material:
- 0.5 L disposable PET bottle
- Distilled water
- CO2 corkscrew with matching tube
- iSi cartridge
- Basalt flour or “rock dust”
- Add 20 g of basalt flour or rock dust to the disposable PET bottle.
- Then fill the bottle two-thirds full with distilled water.
- Using a tube, pump CO2
- directly into the water until the cartridge is empty.
- Seal the bottle and shake it.
This process can be repeated several times.
Experiment 2: Lava rock can capture carbon dioxide (Measuring CO2- and pH-value)
Material:
- Large beaker
- Distilled water
- CO2 corkscrew with matching tube
- iSi cartridge
- pH sensor
- CO2 sensor with membrane cover (e.g., Pasco)
- Magnetic stirrer with stir bar
- Stand with 2 clamps
- Basalt flour or “rock dust”
- The membrane cover is placed around the sensor. The
- CO2-sensor is turned on to warm up and is connected to the smartphone via Bluetooth.
- Add 20 g of basalt flour or rock dust to the beaker.
- Then fill the beaker three-quarters full with distilled water, place it on the magnetic stirrer, and add the stir bar.
- Using a tube, pump CO2 directly into the water until the cartridge is empty.
- Next, immerse the CO2 sensor with the membrane cover as deeply as possible into the distilled water and secure it with the stand material. The cover should be almost completely surrounded by water.
- Turn on the pH sensor, connect it to the measurement system, immerse it in the water, and secure it with the stand material.
- Start the measurement and turn on the magnetic stirrer. If different systems are used for pH and CO2 measurements, they must be started simultaneously. The time interval between measurement points should also be the same (measurements at 1-second intervals are recommended).
