Industrial-scale carbon removal

Our tech leverages the world's
largest industrial waste streams

Arca works in partnership with mining companies, steel producers and other industrial partners to drive the valorization of historical waste for high-quality durable carbon removal.

Arca’s research has identified 21 gigatonnes of carbon removal capacity in suitable historical mine waste material, plus gigatonnes more in other streams of alkaline industrial waste.

This represents an industrial scale opportunity to remove carbon from our atmosphere.

Arca’s technologies can operate at both active and legacy mines, as well as industrial waste facilities.

“ICMM members are rethinking their approach to waste rock. We are recognizing that in many cases this material is not waste but has valuable alternative uses.”

Dr. Emma Gagen

Director, Data & Research
ICMM

A technology with broad
potential across industries

Arca’s approach is effective for various alkaline waste streams, including those from mines producing nickel, chromium, copper, diamond, and asbestos, as well as from industries such as steel and cement manufacturing.​

Our technology enables the industrial materials sector to valorize their alkaline waste for CO₂ capture and sequestration, offering two key benefits:

• Revenue generation from waste products
• Support for Net Zero and sustainability strategies

Our patented tech:
Mineral Activation

We accelerate the natural process of carbon mineralization in industrial wastes that are rich in magnesium silicate minerals (like serpentine) or in the magnesium and calcium found in steel slag. Our technologies liberate these minerals, dramatically increasing their rate and capacity to capture CO₂ from the air.

Arca Head Scientist Dr. Greg Dipple explains more

A portfolio of
mineralization technologies

“Our rockstar science team is developing a portfolio of mineral activation technologies in our new state-of-the-art Vancouver lab. We’re exploring and piloting solutions that accelerate the rate and capacity of CO₂ removal, with bespoke approaches suited to each feedstock.” 

Greg Dipple, Head of Science and co-founder

Our projects: Mt. Keith demonstration pilot

Breaking new ground:
the world's first mineralization
pilot on an active mine site

In November 2023, Arca launched the Mt. Keith Mineral Carbonation Project in Western Australia, in collaboration with BHP, the world’s largest mining operator.

This 18-month project was the first time carbon dioxide removal was deployed at an active mine site. Arca was able to test and optimize its Smart Churning and MRV technologies and successfully removed CO₂ from the atmosphere. It also showed that Arca could work seamlessly and integrate safely within an operational mine.
 

Our projects: the Carbon Sandbox Project

Building a bedrock of confidence
for a game-changing climate solution

Our Carbon Sandbox project has been operating in British Columbia since July 2024. On this large-scale testing site, we are pioneering leading MRV methodologies for mineralization.

Our Methodology: Certified MRV based on on-site data

Certified MRV anchored
in on-site data

• Real-time measurement is collected through our on-site sensors
• Arca’s methodology has been validated by independent assurance expert DNV as compliant to ISO Standard 14064-2
• We’ve written a primer that provides a high level orientation to our methodology. Read it here.

Our co-founder and Head of Science, Greg Dipple, is a global leader in the field of carbon mineralization in mine tailings, with 20+ years of research, over 100 publications that have been cited more than 9,000 times, multiple field trials and a dozen mining industry collaborations.