Start Up Licenses University Mining Sensor Technology

United Science, a start up company in Center City, Minnesota, has licensed sensor technology developed at the University of Minnesota in Minneapolis that could prevent toxic byproducts of copper and iron mining, and potentially other industries, from ending up in the environment.

Chemistry associate professor Philippe Buhlmann developed the ion selective electrode (ISE) sensor membrane. United Science will complete the design and commercialize the membrane technology, now being tested in the mining industry.

ISE sensors detect and measure a specific ion in complex chemical solutions used in mining, food safety, and health sciences. The university says Buhlmann’s fluorous sensor membrane is longer lasting, more durable, and has improved selectivity and less interference than other ISE sensor membranes. Unlike other membranes Buhlmann’s does not contain glass, making it better suited for use in caustic, high-pressure environments such as mining, as well as applications in food safety where broken glass could pose a hazard.

The sensor developed by Buhlmann may also have economic benefits for mining companies. When used in mining, the ISE sensor prevents toxic materials from funneling back into the environment through the waste stream. Miners often use hazardous chemical reagents to draw out valuable ores during the process, but often use more than necessary to ensure all the ore is extracted. The sensor allows miners to use less toxic chemicals, which results in less toxic material in the waste stream, as well as saving money.

According to United Science, if implemented industry-wide the sensors could eliminate at least 24 tons of toxic waste emissions per mine. While the company is currently focusing on copper mines, the technology may be extended to iron mines. Company CEO Jon Thompson says he plans to apply this technology to food safety, but wants to identify other areas where current sensors are inadequate or expensive.

Photo: Phil Scoville/Flickr

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