Virginia Student's Magnetic Filter Removes 95.52% of Microplastics in Tests

Virginia student Mia Heller developed a ferrofluid-based prototype that removed 95.52% of microplastics in experimental tests.

By News National Editorial Team

Virginia, USA | November 6, 2026

An innovative water-purification project developed by Virginia student Mia Heller is attracting attention for its unconventional approach to removing microplastics from water. Instead of relying on a conventional solid filter membrane, her experimental system uses a magnetic liquid known as ferrofluid to capture plastic particles and separate them from water.

Heller developed the project after becoming concerned about microplastic contamination and the repeated maintenance required by conventional household water filtration systems.

Her invention, titled Self-Recycling System for Microplastic Removal: Development of a Novel Ferrofluid-Based Filtration Technology for Affordable Water Treatment, demonstrated the potential of magnetic separation as an alternative approach to water treatment.

How Does the Magnetic Technology Work?

The system uses ferrofluid, an oil-based liquid containing extremely small magnetic particles. When introduced into water containing microplastics, the liquid interacts with the plastic particles and helps capture them.

The mixture is then passed through a magnetic separation process. A magnetic field pulls the ferrofluid, carrying the captured microplastics with it, away from the treated water.

The system also incorporates a separation and filtration stage designed to recover the ferrofluid so that it can be reused rather than discarded after every treatment cycle.

This recycling feature is an important part of Heller's design because it aims to reduce material waste and the ongoing cost of filtration.

Prototype Achieved 95.52% Microplastic Removal

According to the project's official research abstract in the Society for Science database, Heller's prototype removed 95.52% of microplastics from the tested water samples.

The system also recovered 87.15% of the ferrofluid used during the process, allowing it to be recycled.

Her research included testing with polyethylene terephthalate (PET) particles. The project abstract reports that statistical testing showed effective filtration of the tested PET particles.

These figures represent experimental results from the student-developed prototype. They should not be interpreted as independently established performance for every type of microplastic or for all drinking-water conditions.

Recognition at International Science Competition

Heller presented her research at the 2025 Regeneron International Science and Engineering Fair (ISEF), one of the major international science competitions for secondary-school students.

Her project received a special award worth $500 from the Patent and Trademark Office Society in recognition of its innovative approach to water filtration.

She had also achieved recognition at the Virginia Piedmont Regional Science Fair, where she won the grand prize for her earlier project on using oil-based ferrofluid to remove microplastics from drinking water.

Her work has subsequently been featured by Smithsonian Magazine, bringing wider attention to the potential of magnetic separation technology.

Can This Technology Be Used in Homes?

Although the experimental results are promising, the technology is not yet an approved or commercially established drinking-water filtration product.

Further research and independent testing are necessary to determine whether the system can consistently remove different types and sizes of microplastics under real-world conditions.

Researchers would also need to establish whether any ferrofluid, oil or magnetic particles remain in the treated water and how the captured plastic material can be safely collected and disposed of.

Scaling up the technology, maintaining consistent performance and evaluating its long-term operating costs are additional challenges that must be addressed before widespread use becomes practical.

News National Perspective

Mia Heller's project demonstrates how student-led research can explore unconventional solutions to environmental challenges.

Microplastic pollution is an increasingly important water-quality concern, and technologies that make contaminant removal more affordable and accessible deserve further scientific investigation.

The achievement is not that a finished household purifier is already available, but that a student-developed prototype has demonstrated a measurable alternative approach worth studying further.

Sometimes, scientific progress begins with a simple question: Can an existing problem be solved in a different way?

Sources and references

1. Official research record: Society for Science – Mia Heller's ISEF project abstract.

2. Detailed technology and experimental results: Smithsonian Magazine – Student's magnetic microplastic filtration system.

3. Student and project background: Laurel Ridge Community College – Mia Heller's project profile.

4. Regional science fair recognition: Virginia Piedmont Regional Science Fair – Official school district report.