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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

UFS Council unanimously approves two senior appointments
2014-11-24

The Council of the University of the Free State (UFS) unanimously approved the appointment of Dr Lis Lange as Vice-Rector: Academic and Prof Sechaba Mahlomaholo as Dean: Education during its meeting on Friday 21 November 2014.

Dr Lis Lange is currently Acting Vice-Rector: Academic at the University of the Free State, where she holds a substantive position as Senior Director heading the Directorate for Institutional Research and Academic Planning (DIRAP). Prof Mahlomaholo is Head of the School of Mathematics, Natural Sciences and Technology Education at the UFS.

“These are two exceptional and trusted academics with international stature and I am delighted to welcome them as part of the senior leadership of the UFS. Dr Lange’s skills set pertaining to academic management and quality assurance make her one of only a few people with similar skills in the country, while Prof Mahlomaholo is a leading expert in community-based education,” says Prof Jonathan Jansen, Vice-Chancellor and Rector of the UFS.

Dr Lange joined the UFS in 2011. Before this, she was the Executive Director (2006-2010) of the Higher Education Quality Committee of the Council of Higher Education (CHE), and Acting CEO of the same organisation between August 2007 and April 2008. She has been involved in the development and implementation of science and technology and higher education policy in South Africa for a decade and a half, working in different capacities in the Human Sciences Research Council, the National Research Foundation and the Council on Higher Education. Dr Lange has served as a member of the board of the International Network of Quality Assurance Agencies in Higher Education (INQAAHE) and has participated in several international initiatives on quality assurance. She is the editor of an academic journal focused on the humanities, Acta Academica.

She has undertaken research and published in the fields of history, higher education and quality assurance. Her major concern in both research and practice is the role of higher education in the development of democratic societies, based on social justice. Dr Lange studied in Argentina, Mexico and South Africa, where she obtained a PhD in South African history from the University of the Witwatersrand.

Prof Mahlomaholo is a graduate of the Universities of the North, Western Cape and Harvard University in the United States. He is a National Research Foundation (NRF)-rated Professor of Education.

Before joining the UFS, he worked at six other universities where he was Deputy Dean in the Faculty of Education (UNIN-QwaQwa), Head of Professional Education (Vista University), Professor and Director of Research and Postgraduate Studies (MEDUNSA), Professor and Director of Curriculum Development (Central University of Technology), and Research Professor (North-West University).

His research interests lie in designing strategies mounted on Bricolage, Participatory Action Research and Critical Emancipatory Research as theoretical bases. He leads the NRF-sponsored project on the creation of Sustainable Learning Environments in schools. In this Participatory Action Research project, 28 PhD and 22 MEd students participate under the guidance of 15 academics. The project has relationships with the Global Network project (St Petersburg University), the Post-Colonial Education project (West Indies University) and the Discourse, Power, Resistance project (Plymouth University and now University of London). He has served as guest editor in the following ISI-indexed, peer-reviewed and accredited journals: the South African Journal of Higher Education (2010 and 2014), the South African Journal of Education (2011), Communitas (2012), the Journal of New Generation Sciences (2012), the Journal for Transdisciplinary Research in Southern Africa (2013) and the Journal of Education Studies (2013).

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