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25 August 2025 | Story Martinette Brits | Photo Stephen Collett
Prof Elizabeth Erasmus
Prof Elizabeth Erasmus during her inaugural lecture, Molecules of Change: Chemistry for a Better Tomorrow, on 20 August, highlighting how innovative chemistry can turn waste into value and promote sustainable solutions.

With climate change, resource scarcity, and environmental pollution among the most pressing challenges of our time, Prof Elizabeth (Lizette) Erasmus used her inaugural lecture on Wednesday, 20 August to show how chemistry can provide powerful, practical answers. In her lecture, Molecules of Change: Chemistry for a Better Tomorrow, she traced her journey from fundamental research to pioneering innovations that turn waste into value, protect ecosystems, and improve food security.

During her talk, Prof Erasmus – Researcher in the Department of Chemistry – recalled a moment in 2018 that reshaped her career trajectory. While preparing a Sasol research grant on copper oxide nanoparticles, an entrepreneur assisting with the proposal posed a deceptively simple challenge: “So what?” “Although upsetting at first, those two words completely reshaped my outlook,” she explained. “They inspired my journey from purely academic chemistry towards more applied, impactful research – with the mission of not only advancing science, but of also improving society and the environment.”

 

From fundamental science to global solutions

Prof Erasmus began her career in organometallic chemistry, preparing and characterising complex molecules to understand their reactivity and physical properties. Later, her focus shifted to heterogeneous catalysis, where she explored nanomaterials and surface chemistry.

Her research has since evolved towards developing sustainable technologies that address urgent global challenges. One example is agricultural innovation: using green solvents to extract cellulose from wattle tree bark to create biodegradable superabsorbent polymers. “Unlike the polyacrylates in baby diapers, these SAPs degrade into nutrients for soil microbes and plants,” she explained. “By loading them with fertiliser, we develop slow-release, water-retaining materials that improve agricultural sustainability.”

Other projects include producing biochar to restore degraded soils, creating natural growth enhancers such as wood vinegar, and designing an ‘ultimate fertiliser’ that combines these products for long-term soil health. Her group also works on environmental remediation, developing hydrophobic sponges to absorb oil spills, repurposing building waste to clean polluted water, and using innovative chemistry to convert carbon dioxide into valuable products.

“We are even looking at one of the fastest-growing waste streams: e-waste,” Prof Erasmus noted. “With more gold per ton than natural ore, e-waste represents both a challenge and an opportunity. By developing porous absorbent materials, we can selectively capture and reduce gold ions directly to metallic gold – recovering a precious resource from waste.”

She concluded by crediting her team and collaborators: “This, however, is only the tip of the iceberg. The bulk of the work lies beneath the surface, carried out by dedicated students, collaborators, mentors, colleagues, friends, and family. I owe them my deepest gratitude, for they are the ones who truly sustain this journey of transforming chemistry into solutions for a better world.”

 

About Prof Erasmus

Prof Elizabeth (Lizette) Erasmus obtained all her degrees at the University of the Free State: a BSc (2001), BSc Honours in Chemistry (2002), MSc in Chemistry (2003), and a PhD in Chemistry (2005). She has published more than 80 research papers, holds an H-index of 21, and has extensive experience in supervising MSc and PhD students.

After serving as a senior researcher at the CSIR, she returned to academia at the UFS, where her international collaborations in the Netherlands and at UC Davis broadened her focus from organometallic chemistry to heterogeneous catalysis and nanochemistry. Her expertise spans organometallic chemistry, electrochemistry, surface characterisation, and nanomaterials.

News Archive

Three receive PhD degrees in Architecture at Winter Graduation ceremony
2015-07-08

Dr Hendrik Auret, Dr Gerhard Bosman and Dr Madelein Stoffberg.
Photo: Leonie Bolleurs

Three graduates from the University of the Free State’s (UFS) Department of Architecture received their PhD degrees at the 2015 Winter Graduation ceremony on the Bloemfontein Campus. According to Prof Walter Peters from Architecture, this is the first time in the history of the UFS that three PhD degrees in Architecture have been awarded simultaneously. It is country-wide a rare occurrence for three PhDs to be awarded in Architecture at one graduation ceremony.

“Previously, the UFS has only ever awarded a single PhD in Architecture, and that was in 1987, to Leon Roodt, a former head of the department. The first UFS honorary doctorate in Architecture was conferred on Gerard Moerdijk, architect of the Afrikaner church and the Voortrekker Monument. Gawie Fagan and Prof Bannie Britz, late head of the Department of Architecture, were other recipients of an honorary doctorate in Architecture,” said Prof Peters.

At the 2015 Winter Graduation ceremony, the UFS conferred PhDs in Architecture on Hendrik Auret from Roodt Architects in Bloemfontein as well as on Gerhard Bosman, and Madelein Stoffberg from the UFS Department of Architecture.

Dr Hendrik Auret

As an Architecture student at the university, Dr Auret obtained the degree BArchStud in 2004, a BArchStud (Hons) in 2005, and a March (Prof) in 2006, all cum laude. His Master’s design dissertation was judged the best from all South African Architecture learning sites, earning him the coveted ‘Corobrik Architectural Student of the Year’ award.

The work of the Norwegian architect and theorist, Christian Norberg-Schulz, served as the basis of Dr Auret’s PhD thesis, Care, place and architecture: a critical reading of Christian Norberg-Schulz’s architectural interpretation of Martin Heidegger’s philosophy, which considered the cogency of Norberg-Schulz’s architectural ‘translation’ of the German philosopher Heidegger’s thinking.

Dr Gerhard Bosman

On obtaining his BArchStud. and BArch degrees at the university in 1993 and 1995 respectively, Dr Bosman immediately joined the part-time staff of the Department of Architecture. As a lecturer in Building Construction, he developed an interest in vernacular and indigenous methods and techniques. Consequently, he built the first family home in Bloemfontein, for his wife, Debbie, and their two children, of earth construction, which been previously but erroneously considered inferior.

Despite that negative perception, Dr Bosman persuade the university to allow him to undertake post-graduate studies at the International Center for Earth Architecture (CRATerre-ENSAG) within the Ecole d' Architecture de Grenoble, France, from which institution,he was awarded the DPEA-Architecture de Terre qualification in 2000. In 2001,Dr Bosman was appointed to the full-time staff.

In 2003, when the opportunity arose, he became involved with SANPAD, the South Africa-Netherlands Research Project on Alternatives in Development, which lead ultimately to his PhD thesis: The acceptability of earth-constructed houses in central areas of South Africa.

Dr Madelein Stoffberg

In 2005, Dr Stoffberg enrolled as an Architecture student at the UFS, obtaining her BArchStud degree in 2007, the BArchStud (Hons) in 2008 and the March (Prof) in 2009, the latter cum laude. Immediately on graduating, Dr Stoffberg was appointed to her position as a part-time junior lecturer in the Department of Architecture.

During her studies, her attention was drawn to the concept of the spatial triad of Henri Lefebvre. Fascinated with the conceptand by the development of community centres as a contemporary architectural typology, she began her PhD degree.  

Entitled Lived reality, perception and architecture: two community centres interrogated through the lens of Lefebvre’s spatial triad, Dr Stoffberg investigated the relationship between the spatial understanding of the project architect and the community of two completed buildings in Port Elizabeth. She established a mismatch in perception, representation, and use of space, which could be bridged, however, by way of a qualitative research approach, instead of a quantitative one.


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