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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

Lessons of The Spear
2012-08-14

 Discussing weighty issues at the UFS were from left: Prof. Jonathan Jansen; Vice-Chancellor and Rector; Nic Dawes, Editor-in-Chief, Mail & Guardian; Max du Preez: Investigative journalist and political columnist; Ferial Haffajee: Editor, City Press; and Justice Malala: Political commentator and newspaper columnist.
Photo: Johan Roux
14 August 2012

What were South Africans left with after The Spear? More importantly, what did we learn from The Spear?

These were the issues discussed at a seminar, Beyond the Spear, on the controversial Brett Murray painting at the Bloemfontein Campus of the University of the Free State (UFS) on Monday 13 August 2012.

The university hosted this seminar, Beyond the Spear, in conjunction with acclaimed journalists, to look deeper into the lessons that South Africans learnt from this painting and the reaction from the public and politicians following soon after it went on display at the Goodman Gallery in Johannesburg.

The four panellists, Mr Justice Malala (political analyst, journalist and host of the news show, The Justice Factor), Mr Nic Dawes (editor in chief of Mail & Guardian), Mr Max du Preez (investigative journalist and political columnist) and Ms Ferial Haffajee (editor of City Press), all presented their views and experiences on the public’s perceptions of this artwork.

In his opening remarks, Prof. Jonathan Jansen, Vice-Chancellor and Rector, said the purpose of the seminar was to help us make sense of what happened. Prof. Jansen also chaired this seminar.

“This being South Africa, there will be more ‘Spears’. More public crises will unfold that divide the nation and that will stir the emotions. We need to understand what happened so that we are better prepared to deal with the coming ‘Spears’.”

Issues on leadership, South Africa’s hurtful past and the freedom of expression were some of the topics raised by the panellists.

“This has taught us that South Africans – especially the older generation – still need to vent their anger… White South Africa must be patient and allow black citizens to shout at them,” said Mr Du Preez. He warned that this anger should serve a constructive purpose. In reaction to a question if Brett Murray did not disrespect Pres. Jacob Zuma’s dignity with his controversial painting, he said that this painting was “…rude and disrespectful.”

“It was meant to be. It was not honouring him.” He said that politicians will do anything, including messing with the country’s stability, to further their own interests. “From now on we need to be far more alert, far more cynical about our politicians.”

Mr Dawes shared his experience and said that the debates around The Spear were very painful considering where the nation has come from. He said the painting opened up painful pasts and difficult spaces. “It is up to the media to open up these difficult spaces.” He said the painting also brought up questions of how South Africans deal and live with pain. “South Africa must live with its past. The debate should now be how to preserve space for the country’s ghosts and how its citizens could get the resilience to deal with it.”

Ms Haffajee, who was caught in the crossfire between freedom of expression and human dignity and who refused to remove a picture of the painting from the City Press website, said that the media was viciously played by politicians.

“This had shown that achieving freedom took many lives, but it took very little to kill it.” She said The Spear is art that it is part of a rich cultural heritage of protest art.

Mr Malala said with the debates around The Spear painting, something died in South Africa. “The debate was taken away from us. We let politicians get to us.”

After the panellists delivered their presentations, Prof. Jansen led a discussion session between the audience and the panellists.
 

 

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