Commission discusses inviting researcher to explore extracting rare‑earths from coal ash and plant bioremediation

Members of the Environmental Commission on April 16 discussed a proposal to explore plant-based bioremediation and possible recovery of rare-earth elements from coal‑plant byproducts, and agreed to pursue a remote briefing from a North Carolina State researcher.

Commissioner proposal and research description

Commissioner Fierro described recent research showing that certain plants can bioaccumulate rare-earth elements from waste streams such as ash and sludge and that the plants can then be harvested to extract the elements. "There are particular plants that can be placed in waste areas ... and naturally, they bio‑accumulate the rare earth elements," Fierro said, noting the researcher’s work at North Carolina State and suggesting that fly ash from the Fayetteville coal plant could be a candidate material for testing.

Data access and publication considerations

Fierro told the commission the researcher is affiliated with North Carolina State and that, as a public university, the researcher would likely disclose the origin of any samples in publication. Fierro said she could provide materials and that a remote presentation would likely be feasible.

Jurisdictional and operational context

Commissioners and staff clarified jurisdictional limits. A staff member noted that the Fayetteville coal plant is operated by the Lower Colorado River Authority (LCRA) and that Austin’s ownership stake and the plant’s operation by LCRA mean any recommendations from the city or commission would be advisory; access to fly ash and authority to test or dispose of it would likely involve LCRA. "We own have part ownership of it, but it is operated by the Lower Colorado River Authority, which is a different entity than us," a staff participant said during the discussion.

Next steps agreed

Commissioners asked staff to circulate the researcher’s materials and consider inviting the researcher to present remotely as a briefing with possible action. Commissioner Fierro agreed to compile resources and check the researcher’s availability; commissioners and staff identified the joint sustainability committee and Austin Energy contacts as relevant stakeholders for future engagement.

Ending

The commission did not take formal action beyond agreeing to pursue a briefing and circulate materials. Commissioners framed the topic as potentially positive and relevant to long‑range discussions about coal‑plant byproducts and resource recovery, and noted any substantive pilot would require coordination with LCRA and Austin Energy.