ORNL researchers Lu Yu and Yaocai Bai examine vials that contain a chemical solution that causes the cobalt and lithium to separate from a spent battery, followed by a second stage when cobalt precipitates in the bottom.  Carlos Jones/ORNL/DOE

OAK RIDGE — Used lithium-ion batteries from cell phones, laptops and a growing number of electric vehicles are piling up, but options for recycling them remain limited mostly to burning or chemically dissolving shredded batteries. The current state-of-the-art methods can pose environmental challenges and be difficult to make economical at the industrial scale.

The conventional process recovers few of the battery materials and relies on caustic, inorganic acids and hazardous chemicals that may introduce impurities. It also requires complicated separation and precipitation to recover the critical metals. However, recovering metals such as cobalt and lithium could reduce both pollution and reliance on foreign sources and choked supply chains.

This research is funded as a project of the Advanced Battery Recycling Consortium, or ReCell, a program of the Vehicle Technologies Office within DOE’s Office of Energy Efficiency and Renewable Energy. Lu Yu and Yaocai Bai and researchers Rachid Essehli and Anuj Bisht contributed to the study, which utilized the DOE’s Center for Nanophase Materials Science at ORNL.

— Oak Ridge National Laboratory

KNOXVILLE — The Tennessee Department of Environment and Conservation granted $350,197 to the University of Tennessee from the Tire Environmental Act Program. 

“We are seeing great advances in repurposing tires for environmental benefits,” said TDEC Deputy Commissioner Greg Young. ”Programs like this not only help clean up sites of used tires, they involve innovative new uses for them. We congratulate UT-Knoxville on this project.”

UTK is partnering with the Tennessee Department of Transportation (TDOT) to install a series of pavement test sections using the technologies developed from this project. Benefits of including rubber in asphalt pavement mixes include improved skid resistance, cracking resistance, and noise reduction.

The purpose of the Tire Environmental Act Program is to select and fund projects that best result in beneficial uses for waste tires. Projects must qualify for one of three categories: tire processing/recycling, tire-derived material use, or research and development. The program provides grant funding to eligible entities, including local governments, non-profit organizations, higher education institutions, K-12 schools and for-profit businesses.

Tennessee established the Tire Environmental Fund in 2015. Upon the first retail sale of a new motor vehicle to be titled and registered in Tennessee, a flat fee based on the number of a vehicle’s wheels is assessed. The fee goes into the fund, which is used for projects creating or supporting beneficial end uses for waste tires.

Since 2015, grantees have been awarded almost $6.8 million, and approximately 5.5 million tires or nearly 58,000 tons of scrap tires have been diverted from landfills. The tires are repurposed for use in rubberized asphalt, tire-derived aggregate, tire-derived fuel, granulated rubber porous flexible pavement, and other beneficial end uses that result in tires being diverted from landfills for a higher and better use. 

— Tennessee Department of Environment and Conservation

Membrane solvent extraction schematic.   ORNL

OAK RIDGE — Caldera Holding, the owner and developer of Missouri’s Pea Ridge iron mine, has entered a nonexclusive research and development licensing agreement with Oak Ridge National Laboratory to apply a membrane solvent extraction technique, or MSX, developed by ORNL researchers to process mined ores. MSX provides a scalable, efficient way to separate rare earth elements, or REEs, from mixed mineral ores.

The MSX technology was pioneered at ORNL by researchers in the Department of Energy’s Critical Materials Innovation Hub, or CMI, led by Ames National Laboratory. The inventors, Ramesh Bhave and Syed Islam of ORNL’s Chemical Sciences Division are named in 26 inventions and five active licenses related to the recovery of REEs.

Dr. Jacqueline Echols shows off rehabbed Panola Shoals, a rustic kayak launch site that will be the beginning of South River Water Trail.  Paige Penland/Hellbender Press

After years of activism, Atlanta’s South River is now a font of sustainability and fun

This article has been edited since its original publication.

ATLANTA — It has taken decades, but the once-polluted South River is now approved for fishing and recreation, and 40 navigable miles from Panola Shoals, about 30 minutes southeast of downtown Atlanta, to Lake Jackson, are being developed into the South River Water Trail for canoes and kayaks.

“This has always been an environmental justice issue,” said Dr. Jacqueline Echols, board president of the South River Watershed Alliance (SRWA) and driving force behind the cleanup.

The 60-mile South River begins in the 80-percent Black city of East Point, then runs through other predominately Black, South Atlanta communities and into Arabia Mountain Natural Heritage Area, where the Flat Rock Archives “preserves rural African-American history in Georgia.”

Ijams Nature Preschool students were the first to explore the Ijams Nature Playscape at Grayson Subaru Preserve before it opened to the public in May 2022. Customers who purchase or lease a new Subaru from Grayson Subaru Nov. 6, 2023-Jan. 2, 2024, can choose to have Subaru of America, Inc., donate $250 to Ijams as part of the 2023 Subaru Share the Love Event. Donations will be used to expand this natural play area as well as improve the Mead’s Quarry swim area.  Cindy Hassil.

Starting in mid-November, getting a new car from Grayson Subaru could mean new places to play and learn at Ijams Nature Center.

Grayson Subaru has chosen the nonprofit nature center as its hometown charity for Subaru of America, Inc.’s annual Subaru Share the Love Event.