Ion Specific Media

Verified For Unique Project Needs Kurion Conducts Extensive Studies At Its Licensed Radioactive Laboratory In Richland, Washington, To Select The Most Effective Media For Each Project

Technology Proven over Centuries Kurion’s Ion Specific Media builds upon technology dating back to the 19th century and proven effective for environmentally remediation at Three Mile Island and Fukushima Daiichi

Kurion Takes On Cesium At Fukushima Daiichi Kurion’s Ion Specific Media Is Credited With Capturing 70% Of The Radioactivity Removed From Contaminated Water Within The First Nine Months Of Operation

Kurion’s Ion Specific Media captures specific ions from contaminated water efficiently and economically.

Kurion’s media and treatment systems have shown their effectiveness at Fukushima Daiichi, where they are used to remove cesium and strontium. These systems comprise two of the “seven samurai” that are cleaning contaminated water at the site.


Kurion Project Director at Fukushima Daiichi inspecting the mobile processing system, which employs TS-G, Kurion’s proprietary Ion Specific Media to remove strontium from contaminated water

Based on ion exchange – a natural phenomenon that has been harnessed by scientists and engineers for over 150 years – Kurion’s Ion Specific Media builds upon technologies used in the cleanup of Three Mile Island to selectively remove ions from water.

Ion exchange plays a crucial role in protecting the environment from nuclear waste, particularly ions found in contaminated water that emit alpha, beta and gamma particles.

A Molecular Filter


Kurion’s family of Ion Specific Media that selectively remove ions from water

The greatest threat to human health and the surrounding environment are ions and isotopes with long half-lives, such as cesium-137, strontium-90, iodine-129, and technetium-99. Kurion captures these hazards with its Ion Specific Media through an ion exchange process.

Ion separation is a key step in Kurion’s comprehensive approach to waste management. Kurion’s family of media are easily converted into glass, the most stable form for waste disposal.

How It Works

Ion exchange materials can capture ions based on both their size and charge.

Imagine a chain-link fence: The wires form a hole in which a single golf ball is perched. If a tennis ball were to hit the fence, it would displace the golf ball and stick within the links. Similarly, ions such as cesium act as the tennis ball during the ion exchange process, where they displace sodium and are captured within the exchange material.

Hazardous ions are captured within Kurion’s Ion Specific Media through the ion exchange process

Kurion’s media have been used to treat contaminants in many types of projects: groundwater remediation, nuclear fuel pools, and most recently, the cleanup of the Fukushima Daiichi Nuclear Power Plant.

Flexible and Efficient

Kurion offers several classes of Ion Specific Media: zeolite-based, titanosilicate-based, phosphate-based and fully synthetic specialty media for difficult projects.

Our media offer multiple advantages over alternative materials:


Radiation Resistant
Low sensitivity to pH and salt water
Excellent glass formers


Kurion Ion Specific Media are available in three formats to accommodate the needs of any project:


Batch applications → Powder
Column applications → Granular
Specialty applications → Spherical

The media are compatible with existing nuclear power plant water purification and demineralization systems.

A key component of the company’s end-to-end approach, Kurion’s family of media is inorganic and easily converted into glass through Kurion’s vitrification technologies.


More Information

Ion Specific Media