--- title: Breakthrough in non-toxic gold leaching! description: Chromafora achieves a major breakthrough in non-toxic gold leaching, offering cyanide-free extraction from mining waste using innovative SELMEXT™ technology. Partners sought for future projects. image: https://chromafora.com/hubfs/INSIGHTS/insight-goldleaching.jpg --- [Skip to content](https://chromafora.com/insights/breakthrough-in-non-toxic-gold-leaching#main-content) [![chromafora-logo-white](https://chromafora.com/hs-fs/hubfs/LOGOS%20and%20ICONS/chromafora-logo-white.png?width=150&height=30&name=chromafora-logo-white.png) ![chromafora-logo-green](https://chromafora.com/hs-fs/hubfs/LOGOS%20and%20ICONS/chromafora-logo-green.png?width=150&height=30&name=chromafora-logo-green.png)](https://chromafora.com) Turning wastewater into renewable resources - [TECHNOLOGIES](https://chromafora.com/technology) - [ABOUT CHROMAFORA](https://chromafora.com/about-us) - [INSIGHTS](https://chromafora.com/insights) - [CONTACT](https://chromafora.com/contact-us?purpose_of_inquiry=General) - [TECHNOLOGIES](https://chromafora.com/technology) - [ABOUT CHROMAFORA](https://chromafora.com/about-us) - [INSIGHTS](https://chromafora.com/insights) - [CONTACT](https://chromafora.com/contact-us?purpose_of_inquiry=General) - [Home](https://chromafora.com) / - [Insights](https://chromafora.com/insights) / - Breakthrough in non-toxic gold leaching! # Breakthrough in non-toxic gold leaching! Technology 18 June 2024 ![Breakthrough in non-toxic gold leaching!](https://chromafora.com/hubfs/INSIGHTS/insight-goldleaching.jpg) [Press release](https://chromafora.com/insights/tag/press-release) Leaching gold with thiosulfate is a well-known process – but until now, no one has developed a sufficiently effective method for separating gold and copper after leaching. Cyanide leaching is the conventional method for gold leaching, but it poses significant risks to both humans and the environment. Therefore, Chromafora has modernized thiosulfate leaching and combined it with its unique metal separation technique SELMEXT™. The result is cyanide- and toxin-free gold extraction from electronic waste, mining waste, and other residues. Since spring 2022, Chromafora has been conducting a scale-up study to extract gold from mining materials. This is being done in collaboration with BJÖRKDALSGRUVAN AB, one of northern Europe’s largest gold mining companies. The project will conclude and be summarized at the end of September, but the results already look promising. > “Björkdalsgruvan has complex material to handle, but the scale-up has been successful and what we are presenting signifies a major breakthrough for non-toxic gold leaching,” > > Johan Berg, application manager at Chromafora. After the summer, Chromafora will proceed with new gold projects in a larger facility and is now seeking more partners in recycling, metallurgy, technology, and the mining industry. Chromafora is seeking more partners in recycling, metallurgy, technology, and the mining industry. Interested in learning more? Contact Johan Berg at [johan.berg@chromafora.com](mailto:johan.berg@chromafora.com). The gold leaching project is a part of the strategic innovation program Swedish Mining Innovation – a joint initiative by Vinnova, Formas, and the Swedish Energy Agency. [CONTACT US](https://chromafora.com/contact-us?purpose_of_inquiry=General) [Back to insights](https://chromafora.com/insights) ### Related insights [![Thiosulfate Gold Leaching by Chromafora – High Yield and Low Costs Confirmed in Pilot](https://chromafora.com/hs-fs/hubfs/INSIGHTS/insight-gold-pilot.jpg?width=352&name=insight-gold-pilot.jpg) Thiosulfate Gold Leaching by Chromafora – High Yield and Low Costs Confirmed in Pilot Press release Dec 29, 2025](https://chromafora.com/insights/thiosulfate-gold-leaching-by-chromafora-high-yield-and-low-costs-confirmed-in-pilot) [![Johan Seijmer, CEO Chromafora](https://chromafora.com/hs-fs/hubfs/INSIGHTS/insight-seijmer1.jpg?width=352&name=insight-seijmer1.jpg) Chromafora’s unique method captures long and short-chain PFAS from leachate Press release Apr 11, 2022](https://chromafora.com/insights/chromaforas-unique-method-captures-long-and-short-chain-pfas-from-leachate) [![Chromafora CEO Johan Seijmer named one of Sweden’s 150 most impactful tech leaders](https://chromafora.com/hs-fs/hubfs/INSIGHTS/insight-Seijmer-teknikledare.jpg?width=352&name=insight-Seijmer-teknikledare.jpg) Chromafora CEO Johan Seijmer named one of Sweden’s 150 most impactful tech leaders Company info Apr 30, 2025](https://chromafora.com/insights/chromafora-ceo-johan-seijmer-named-one-of-swedens-150-most-impactful-tech-leaders) [![Chromafora to tackle widespread chemical pollution with €22.5 million EU backing](https://chromafora.com/hs-fs/hubfs/INSIGHTS/insight-EIB.jpg?width=352&name=insight-EIB.jpg) Chromafora to tackle widespread chemical pollution with €22.5 million EU backing Press release Dec 20, 2024](https://chromafora.com/insights/chromafora-to-tackle-widespread-chemical-pollution-with-22.5-million-eu-backing) [![Chromafora among the winners in Business Sweden’s Catalyst 2023!](https://chromafora.com/hs-fs/hubfs/insight_catalyst.jpg?width=352&name=insight_catalyst.jpg) Chromafora among the winners in Business Sweden’s Catalyst 2023! Company info May 17, 2023](https://chromafora.com/insights/chromafora-among-the-winners-in-business-swedens-catalyst-2023) [MORE INSIGHTS](https://chromafora.com/insights) [![chromafora-logo-white](https://chromafora.com/hs-fs/hubfs/LOGOS%20and%20ICONS/chromafora-logo-white.png?width=120&height=24&name=chromafora-logo-white.png "chromafora-logo-white")](https://chromafora.com) ### CONTACT Chromafora AB Vretensborgsvägen 20 126 30 Hägersten, Sweden +46 8 23 53 50 Kildemarksvej 3 4200 Slagelse Denmark BluePoint Brussels Blvd Auguste Reyers 80 1030 Brussels, Belgium [Get in touch](https://chromafora.com/contact-us?purpose_of_inquiry=General) ### INSIGHTS Stay up-to-date with the latest news, articles, videos and more [Go to Insights](https://chromafora.com/insights) ### NEWSLETTER Get the latest Chromafora news to your inbox Chromafora is an innovative cleantech company offering water treatment technologies for removing contaminants while reducing waste through selectivity. The company’s portfolio includes unique, patented water treatment technologies –SELPAXT and SELMEXT – based on proprietary chemistry. Chromafora’s PFAS removal technologies eliminate ultra-short-, short-, and long-chain PFAS from water streams, while its metal extraction technologies target the removal of heavy metals and contribute to the conservation of critical raw materials by enabling the recovery and recycling of valuable metals from waste. © Copyright Chromafora 2026. 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