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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.

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Premiere of the documentary on King Moshoeshoe - Address by the Rector
2004-10-14

Address by the rector and vice-chancellor of the University of the Free State, prof Frederick Fourie, at the premiere of the documentary on King Moshoeshoe, Wednesday 13 October 2004

It is indeed a privilege to welcome you at this key event in the Centenary celebrations of the University of the Free State.

We are simultaneously celebrating 100 years of scholarship with 10 years of democracy

Today is a very important day with great significance for the University. This Centenary is not merely a celebration of an institution of a certain age. It is a key event in this particular phase of our history, in our transformation as an institution of higher learning, in taking the creation of a high-quality, equitable, non-racial, non-sexist, multicultural and multilingual university seriously.

This is about building something new out of the old, of creating new institutional cultures and values from diverse traditions.

It is about learning together - as an higher education institution - about who we are where we come from – to decide where we are going.

It is about merging the age-old tradition of the university, of the academic gown, with the Basotho blanket, the symbol of community engagement.

Then why is it important that we remember Moshoeshoe, where does he fit into our history?

In the Free State province, where large numbers of Basotho and Afrikaners (and others) now live together, a new post-apartheid society is being built in the 21st century.

The challenge is similar to that faced by Moshoeshoe 150 years ago. As you will see tonight, he did a remarkable thing in forging a new nation out of a fragmented society. He also created a remarkable spirit of reconciliation and a remarkable style of leadership.

Not all people in South Africa know the history of Moshoeshoe. Many Basotho – but not all – are well versed in the history of Moshoeshoe, and his name is honoured in many a street, town and township. Many white people know very little of him, or have a very constrained or even biased view of his role and legacy. In Africa and the world, he his much less known than, for instance, Shaka. (In Lesotho, obviously, he is widely recognised and praised.)

We already benefit from his legacy: the people of the Free State share a tradition of moderation and reconciliation rather than one of aggression and domination.

With Moshoeshoe, together with Afrikaner leaders and reconciliators such as President MT Steyn and Christiaan de Wet, we have much to be thankful for.

Our challenge is take this legacy further: to forge a new society in which different cultural, language and racial groups – Basotho, Afrikaners and others – will all feel truly at home.

Bit by bit, on school grounds, on university campuses, in each town and city, people must shape the values and principles that will mould this new non-racial, multicultural and multilingual society.

A shared sense of history, shared stories and shared heroes are important elements in such a process.

Through this documentary film about King Moshoeshoe, the UFS commits itself to developing a shared appreciation of the history of this country and to the establishment of the Free State Province as a model of reconciliation and nation-building.

Moshoeshoe is also a strong common element, and binding factor, in the relationship between South Africa / the Free State, and its neighbour, Lesotho.

For the University of the Free State this also is an integral part of real transformation – of creating a new unity amidst our diversity.

Transformation has so many aspects: whilst the composition of our student and staff populations have been changing, many other things change at the same time: new curricula, new research, new community service learning projects.

In also includes creation of new values, new (shared) histories, new (shared) heroes.

It includes the incorporation of the Qwaqwa campus, which serves a region where so many of the children of Moshoeshoe live, including her majesty Queen Mopeli.

We see in Moshoeshoe a model of African leadership – of reconciliation and nation-building – that can have a significant impact in South Africa and Africa as a whole.

We also find in the legacy of King Moshoeshoe the possibility of an “founding philosophy”, or “defining philosophy”, for the African renaissance.

To develop this philosophy, we must gain a deeper understanding of what really happened there, of his role, of his leadership.

Therefore the University of the Free State will encourage and support further research into the history, politics and sociology of the Moshoeshoe period, including his leadership style.

We hope to do this in partnership with National University of Lesotho.

The Moshoeshoe documentary is one element of a long-term project of the UFS. The other elements of the project that we are investigating are possible PhD-level research; a possible annual Moshoeshoe memorial lecture on African leadership; and then possible schools projects and other ways and symbols of honouring him.

It is my sincere wish that all communities of the Free State and of South Africa will be able to identify with the central themes of this documentary, and develop a shared appreciation for leaders such as King Moshoeshoe and the legacy of peace, reconciliation and nation-building that they have left us.

Prof. Frederick Fourie
Rector and Vice-Chancellor
University of the Free State
13 October 2004.

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