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Published on: July 28, 2023
Nanobubble Technologies Offer Opportunities To Improve Water Treatment
Ariel J Atkinson1, Onur G Apul2, Orren Schneider3
1Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, School of Sustainable Engineering and the Built Environment , Arizona State University , Tempe , Arizona 85287-5306 , United States.
Nanobubbles (NBs) show promise for water purification by generating reactive oxygen species (ROS) to eliminate pollutants and pathogens. Further research is needed to measure NB properties in complex water chemistries for advanced treatment applications.
Area of Science:
- Environmental Science and Engineering
- Materials Science
- Physical Chemistry
Background:
- Nanobubbles (NBs), gas spheres <1000 nm, have evolved since 1994 with emerging applications in water treatment.
- Current water purification faces challenges in removing diverse natural and anthropogenic contaminants.
- NBs offer potential for improved efficiency and reduced byproducts in water and wastewater treatment.
Purpose of the Study:
- To explore the potential of nanobubbles (NBs) for enhancing water purification technologies.
- To address key questions regarding NB properties, formation, and application in water treatment.
- To identify research opportunities for advancing NB utilization in safe water production.
Main Methods:
- Review and synthesis of existing research on nanobubble (NB) properties and applications.
- Exploration of NB mechanisms for gas transfer, reactive oxygen species (ROS) generation, particle aggregation, and fouling mitigation.
- Identification of knowledge gaps and research priorities for NB-based water purification.
Main Results:
- Nanobubbles (NBs) demonstrate potential for improved gas transfer and reactive oxygen species (ROS) generation for pollutant oxidation.
- NBs may enhance particle aggregation and mitigate surface fouling in water treatment systems.
- Significant knowledge gaps exist in measuring NB properties in complex water matrices.
Conclusions:
- Nanobubble (NB) technology, particularly ROS production, holds great promise for replacing chemical oxidants in water treatment.
- NBs offer a sustainable and potentially cost-effective solution for decentralized water purification systems.
- Further research is crucial to develop measurement techniques and fully exploit NB potential in diverse water chemistries.
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