Three-Dimensionally Printed Mini Air Scrubbing Cartridges Based on Nano-Graphite for Air Pollution Monitoring.

Area of Science:

• Environmental Science
• Analytical Chemistry
• Materials Science

Background:

• Atmospheric pollution poses risks to ecosystems, human health, and climate.
• Portable, low-cost monitoring systems are needed to assess daily human exposure to pollutants.
• 3D printing offers rapid prototyping and cost-effective fabrication of complex devices.

Purpose of the Study:

• To fabricate and test 3D printed cartridges for air pollutant monitoring.
• To evaluate the air scrubbing performance of cartridges with and without nano graphite.
• To assess the impact on low-cost monitoring systems using photoionization sensors.

Main Methods:

• Fabrication of 3D printed cartridges using commercial photopolymer and nano graphite-modified resin.
• Integration of cartridges into a low-cost monitoring system with a photoionization sensor.
• Testing air scrubbing efficiency for ethanol, benzene, and toluene at specific concentrations.

Main Results:

• All tested cartridges effectively abated ethanol and toluene.
• Cartridges modified with nano graphite showed a 20-fold increase in benzene abatement.
• The modified cartridges demonstrated potential for reducing interfering compounds.

Conclusions:

• 3D printed cartridges, especially those with nano graphite, are effective for air pollutant abatement.
• Nano graphite modification significantly enhances benzene removal in monitoring systems.
• These cartridges can improve the accuracy of low-cost air quality monitoring devices.