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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

Emotional health of vulnerable children needs urgent intervention
2014-02-04



In South Africa, thousands of children under the age of 18 are orphaned as a result of HIV/Aids. Experts are worried that these orphans and vulnerable children will experience serious socio-emotional problems and behaviour disorders, should urgent intervention programmes not be implemented urgently.

A study was undertaken by the Centre for Development Support at the UFS, in conjunction with Stellenbosch University and the Houston University in America. The research found that in the Free State province alone, about 15% of orphans and vulnerable children showed signs of psychiatric disorders. Almost half of the children in the study showed signs of abnormal or maladjusted behavioural functioning.

The research team believes that the South African government and the numerous non-governmental organisations put too much emphasis on the physical needs of orphaned and vulnerable children and that their socio-emotional or mental wellbeing receives very little attention.

The nominal financial grant is a welcome relief for some of the needs of this risk group. Researchers are worried, though, that the lack of reliable and culturally-sensitive diagnostic methods for the early detection of psychiatric disorders may pose a challenge when the children reach puberty.

The current study is focusing on the detection of emotional behavioural problems even before adolescence. Questionnaires were distributed across the Free State at clinics, schools and non-governmental organisations dealing with these children. The questionnaires enabled researchers to establish the children's socio-emotional needs.

"Overcrowding in houses where orphans and vulnerable children often live is directly linked to poor socio-emotional health in children," says Prof Lochner Marais from the Centre for Development Support. "The state institutions offering programmes for orphans and vulnerable children overemphasise the physical and/or financial needs of these children. The programme provides, for example, food for the children, grants for the [foster] parents, assistance with school clothes and ensures clinic visits for the children. Of these, only the supply of food has a direct impact on the improved mental health of children."

The study provides, for the first time, a profile of the state of mind of this group, as well as the emotional impact of HIV/Aids – an "urgent matter" according to Dr Carla Sharp from the University of Houston's Department of Psychology. According to Dr Sharp, much more could be done to assist foster parents in addressing the emotional needs of these children. The early detection of behavioural disorders should be the key in intervention programmes.

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