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20 December 2024 | Story Leonie Bolleurs | Photo Supplied
Yolandi Schoeman
Dr Yolandi Schoeman is redefining the future of ecological restoration with innovative solutions for both Earth and space.

Dr Yolandi Schoeman, a Senior Lecturer in Ecological Engineering in the Centre for Mineral Biogeochemistry at the University of the Free State (UFS) and the Ecological Engineering Institute of Africa, was fascinated by the synergy between engineering and the natural sciences from a young age.
 
She said that the potential within ecological engineering to regenerate ecosystems at all scales, from the microscopic to vast landscapes, really drew her in. “This field offers solutions not only for daily sustainability challenges but also for the threats to planetary health and human well-being. However, when I was starting out, ecological engineering wasn't recognised as a formal career path in South Africa, and studying it in the United States wasn't feasible for me at the time. So, I explored various educational paths in civil engineering and natural sciences, aiming to merge these disciplines in my projects and research. My ultimate goal has been to establish and develop the field of ecological engineering both in South Africa and across Africa,” she explained. 

Conventional and extreme ecological engineering

Dr Schoeman’s work in ecological engineering spans two main areas: conventional and extreme ecological engineering. On the conventional side, she says she is focusing on projects like designing constructed wetlands to naturally treat water, implementing urban greening initiatives to cool cities and manage stormwater, and regenerating various habitats to strengthen biodiversity. In terms of extreme ecological engineering, she focuses on developing innovative solutions for ecosystems that have been severely impacted by disasters like industrial accidents or natural calamities. 

Additionally, she is leading efforts in astro-ecological engineering, applying these principles to rehabilitate severely damaged terrestrial environments while exploring their potential for extraterrestrial applications, advancing both sustainability and ecological restoration.

There are two moments in her journey that Dr Schoeman recalled helped shape her career. One was being invited to participate in the 2006 Brightest Young Minds initiative, hosted by the University of Stellenbosch. She said that it was the first platform where she could really develop and share her ideas and vision in ecological engineering. “I contributed to a publication titled Engineering Engineering, which focused on integrating nature into every facet of development and operations. That experience validated my vision of combining engineering and natural systems.”

The other experience came during her studies in Executive Leadership at the Skolkovo School of Management in Moscow. “I was tasked with leading a multidisciplinary, international team that had to create a sustainability strategy for a major international iron, steel and vanadium company. The project pushed me to defend sustainability solutions that would alter the way this industrial giant operated. It was a deeply challenging process that changed my perception of true sustainability and what it means to deliver solutions that are both impactful and make business sense. That moment forced me to step out of the comfort zone of conventional sustainability and reorient my path toward pursuing solutions that seemed almost impossible, but necessary.”

Advancing ecological engineering across Africa

Two of the most important research projects she has been involved in include advancing ecological engineering across Africa and restoring and managing ecosystems that are considered beyond conventional repair. The first project involved establishing an international institution that spearheads various innovative research areas, including exploring floating treatment wetlands, different types of constructed wetlands, and technologies for smarter ecosystem management in urban and rural contexts. “This comprehensive project has substantially elevated the global understanding and application of ecological engineering, addressing a spectrum of sustainability challenges,” she said.

In the second project she worked with a team that tackled severely degraded environments like post-mining landscapes, heavily polluted industrial sites, and areas where ecosystem functionality has been drastically compromised. She also aims to develop the projects further and to collaborate with agencies like NASA to design life-support systems for future space habitats. “These systems are not limited to space applications, but are also designed to address complex planetary health issues in extreme environments on Earth, such as war zones, nuclear disaster areas, and sites affected by climatic catastrophes,” she remarked.

Dr Schoeman is also responsible for the "Astroecological Engineering System" (AES). “This system uniquely integrates terrestrial ecological engineering principles with astro-ecological technologies to deal with some of the most challenging environmental restoration projects on Earth and potentially in future space habitats,” she stated, adding that AES is specifically designed for restoring heavily degraded or contaminated ecosystems – situations where traditional restoration methods are inadequate. 

Pushing the boundaries of what’s possible 

She believes AES is a versatile tool for addressing some of the most daunting environmental challenges we currently face. This passion for handling seemingly insurmountable problems is what drives her work. 

“These are the issues that often push the boundaries of what's possible in ecological engineering. Each project that seems 'impossible' provides an opportunity not just to solve a problem, but to innovate and create methods that can be applied globally. It's about turning what was once thought unachievable into tangible, impactful realities that improve our environment and our relationship with the natural world. I truly believe that humanity holds the pen that can rewrite our future.”

About the future, she says that over the next 15 years she would like to see extreme ecological engineering, supported by astro-ecological insights, evolve into a foundational strategy in global environmental management. This approach will be key in scenarios where traditional restoration methods are inadequate. “My goal is to integrate these advanced, resilient techniques into mainstream disaster response and urban planning processes worldwide, preparing ecosystems and communities to withstand and adapt to future ecological stresses,” she said.

She also envisions a future where the principles of extreme and astro-ecological engineering are routinely taught in academic institutions and incorporated into public policy. “By raising awareness and building expertise on a global scale, I aim to cultivate a new generation of engineers – those who are not only equipped to take on severe environmental crises on Earth but are also prepared for the ecological challenges we may face in space. This ambitious vision drives a shift towards more resilient and adaptive management of Earth's ecosystems, ensuring they thrive amidst the challenges of the 21st century.”

News Archive

Nanotechnology breakthrough at UFS
2010-08-19

 Ph.D students, Chantel Swart and Ntsoaki Leeuw


Scientists at the University of the Free State (UFS) made an important breakthrough in the use of nanotechnology in medical and biological research. The UFS team’s research has been accepted for publication by the internationally accredited Canadian Journal of Microbiology.

The UFS study dissected yeast cells exposed to over-used cooking oil by peeling microscopically thin layers off the yeast cells through the use of nanotechnology.

The yeast cells were enlarged thousands of times to study what was going on inside the cells, whilst at the same time establishing the chemical elements the cells are composed of. This was done by making microscopically small surgical incisions into the cell walls.

This groundbreaking research opens up a host of new uses for nanotechnology, as it was the first study ever in which biological cells were surgically manipulated and at the same time elemental analysis performed through nanotechnology. According to Prof. Lodewyk Kock, head of the Division Lipid Biotechnology at the UFS, the study has far reaching implications for biological and medical research.

The research was the result of collaboration between the Department of Microbial, Biochemical and Food Biotechnology, the Department of Physics (under the leadership of Prof. Hendrik Swart) and the Centre for Microscopy (under the leadership of Prof.Pieter van Wyk).

Two Ph.D. students, Chantel Swart and Ntsoaki Leeuw, overseen by professors Kock and Van Wyk, managed to successfully prepare yeast that was exposed to over-used cooking oil (used for deep frying of food) for this first ever method of nanotechnological research.

According to Prof. Kock, a single yeast cell is approximately 5 micrometres long. “A micrometre is one millionth of a metre – in laymen’s terms, even less than the diameter of a single hair – and completely invisible to the human eye.”

Through the use of nanotechnology, the chemical composition of the surface of the yeast cells could be established by making a surgical incision into the surface. The cells could be peeled off in layers of approximately three (3) nanometres at a time to establish the effect of the oil on the yeast cell’s composition. A nanometre is one thousandth of a micrometre.

Each cell was enlarged by between 40 000 and 50 000 times. This was done by using the Department of Physics’ PHI700 Scanning Auger Nanoprobe linked to a Scanning Electron Microscope and Argon-etching. Under the guidance of Prof. Swart, Mss. Swart en Leeuw could dissect the surfaces of yeast cells exposed to over-used cooking oil. 

The study noted wart like outgrowths - some only a few nanometres in diameter – on the cell surfaces. Research concluded that these outgrowths were caused by the oil. The exposure to the oil also drastically hampered the growth of the yeast cells. (See figure 1)  

Researchers worldwide have warned about the over-usage of cooking oil for deep frying of food, as it can be linked to the cause of diseases like cancer. The over-usage of cooking oil in the preparation of food is therefore strictly regulated by laws worldwide.

The UFS-research doesn’t only show that over-used cooking oil is harmful to micro-organisms like yeast, but also suggests how nanotechnology can be used in biological and medical research on, amongst others, cancer cells.

 

Figure 1. Yeast cells exposed to over-used cooking oil. Wart like protuberances/ outgrowths (WP) is clearly visible on the surfaces of the elongated yeast cells. With the use of nanotechnology, it is possible to peel off the warts – some with a diameter of only a few nanometres – in layers only a few nanometres thick. At the same time, the 3D-structure of the warts as well as its chemical composition can be established.  

Media Release
Issued by: Mangaliso Radebe
Assistant Director: Media Liaison
Tel: 051 401 2828
Cell: 078 460 3320
E-mail: radebemt@ufs.ac.za  
18 August 2010
 

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