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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

Dr Oprah Winfrey praises our university
2011-08-24

 

Dr Oprah Winfrey after receiving her honorary doctorate degree.
Photo: Rian Horn

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Transcription (pdf document)
 

“I came 8 000 miles to say, thank you, Vrystaat!” and “God bless South Africa,” were the words Dr Oprah Winfrey used yesterday to respectively open and close her address to an overflowing Callie Human Centre on our Bloemfontein Campus.

Our university awarded an honorary doctorate in Education to Dr Winfrey during a stately, yet warm and cheerful affair yesterday, which saw the 4 500 seater Callie Human Centre packed to the rafters with adoring fans, staff members and students. 

The honorary doctorate is in recognition of her unparalleled dedication to improving the lives and futures of so many by improving education and ensuring that it is accessible to all. Through her award-winning show, The Oprah Winfrey Show (which concluded this year after 25 years of entertainment and service), and the various charity organisations she has established, Dr Winfrey has harnessed the power of her iconic stature in the struggle to eradicate poverty and make education accessible to all.

The ceremony’s audience was entertained by South African music legend, Ms Sibongile Khumalo, the Bloemfontein Children’s Choir, Bartimea School for the Deaf and Blind’s Sign Language Choir, and several other musical performers as well as dancers.

Dr Winfrey could not hold back her tears when Mr John Samuel, interim Director of our International Institute for Studies in Race, Reconciliation and Social Justice, described her as an “honorary daughter of South Africa”. She proved just how much the country means to her when she joined in the singing of the South African national anthem, Nkosi Sikeleli, despite struggling with the words in some parts.

According to Dr Winfrey, her interest in our university began after she had read an article by Prof. Jonathan Jansen, Vice-Chancellor and Rector, in which he emphasised the need for South Africans to stop accepting mediocrity, if ever the country is to develop to its full potential.

She asked Mr Samuel to convey her message of support to Prof. Jansen and the wheels, which led to today’s great event, were set in motion. 

She also expressed her admiration of the transformation process at our university and our commitment to “reconciliation, peace and harmony”. “What has happened at the University of the Free State is nothing short of a miracle and this is truly what the New South Africa is about,” she said to loud cheers from the audience. 

To emphasise her point, she called the five workers from the Reitz video to the stage and used their forgiveness and acceptance of the students responsible for the video as an example of the healing achieved at the UFS. 

“Having seen this forgiveness has allowed me to expand my vision of what we can be.” She also delivered a message of encouragement and reminded students that anyone, despite their circumstances and background, could become successful and grow to overcome their obstacles, as she had done.

“Anyone can be successful if they put their mind to it, work hard and are diligent,” she said. “We must all strive for more than success, though, and fulfil the highest expression of ourselves as humans by realising who you are and what you are meant to be.”

Following her address, Dr Winfrey answered several questions from our students, giving them advice on, among other things, how to choose a career that is right for them, and good characteristics to look for in leaders and peers.

She also mentioned that several learners from the Oprah Winfrey Leadership Academy, which has its very first group of Grade 12 learners this year, would be visiting our university next month in order to help them select a university to attend next year.

 

Media Release
25 June 2011
Issued by: Lacea Loader
Director: Strategic Communication
Tel: 051 401 2584
Cell: 083 645 2454
E-mail: news@ufs.ac.za
  

 

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