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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

Guest lecture: Mr Pretorius, CEO of McCarthy Limited
2004-11-05

The challenges facing business leaders in a rapidly changing South Africa

“The world we used to know does not exist anymore. Leaders are continually dealing with crisis and opportunities, in a high-pressure environment,” said Mr Brand Pretorius, honorary professor from the University of the Free State , delivering his 13th guest lecture on the challenges facing business leaders in a rapidly changing South Africa .

Mr Pretorius, CEO of McCarthy Limited, identified certain trends which are responsible for changes to the South African business environment. He said the South African business environment is ever-changing, fast moving, complex and unpredictable. “As business people we have to deal with the impact,” he said.

“Years ago we were globally isolated. Now we live in a shrinking borderless world with crumbling trade barriers. Globilisation of our economy is accelerating. For South African business leaders this creates a sea of export opportunities,” he said.

Although there are ongoing demands for substantial profit growth from shareholders, the days of focussing only on their interests are gone, said Mr Pretorius. Stakeholder commitment now enjoys high priority and business leaders have to deal with the challenges accompanying black economic empowerment and employment equity.

Customers are also well-informed and demanding. Business leaders could easily loose the loyalty of their customers because of a hyper-competitive environment with an oversupply of goods and services.

Mr Pretorius stated that staff want to be involved and are looking for meaning in their workplace. Employers also have to deal with HIV/Aids in their workplaces. Trauma, absenteeism and financial implications could have a great effect on the viability of a business.

Against these changes Mr Pretorius pointed out the challenges business leaders are facing. In doing so a number of questions arise. The external business climate is characterised by turbulence and change. Internally there is a need for stability and meaning. How do we handle both challenges effectively?

Because of changes strategy decay is taking place and past strategies become irrelevant. Mr Pretorius said that business leaders need to modify their business models to prevent the downfall of their companies.

It is important for leaders to know what is happening in their world. “Continuous innovation is a critical success factor. The reality is that innovation is the only insurance against irrelevance,” he said.

Because of a changed environment leaders must perform and transform, simultaneously. How do we strike a balance between focused transformation and the achievement of world class performance, asked Mr Pretorius? “We need to bring about meaningful and sustainable empowerment, in order to create an inclusive economy and society. Leadership and management profiles should reflect the diversity of our teams, however at the same time every effort should be made to stop the brain drain and retain the expertise of experienced white managers.”

He also stated that leaders have an important role to play in terms of employment creation and corporate caring. “Sustainable stability and prosperity will not materialise without efforts in this regard.”

Mr Pretorius said that above challenges could be addressed by developing the ability to focus on creating a better future, rather than defending the past, a long-term vision, facing new realities, enhancing the value of brands and mobilising IT and the Internet to serve the business and customers better.

Retaining a positive vision of the future, embracing change and transformation, building your business according to the right principles and values and aspiring to be the best are some of the guidelines, according to Mr Brand, for future business success. He stated that creating a value advantage above one’s competitors, customer satisfaction and retention and inspirational leadership will add to the success of one’s business.

“We are indeed living in the era of the ultimate challenges, but also the ultimate opportunities. Let me clearly state that I have hope – in my view the tide has turned. Every day I experience small miracles inspired by ordinary people making an extraordinary difference,” said Mr Pretorius.

 

Media release
Issued by: Lacea Loader
Media Representative
Tel: (051) 401-2584
Cell: 083 645 2454
E-mail: loaderl.stg@mail.uovs.ac.za
5 November 2004

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