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29 May 2025 | Story Martinette Brits | Photo Kaleidoscope Studios
Prof Hendrik Swart
Prof Hendrik Swart from the UFS Department of Physics was recently recognised by the Golden Key Honour Society Southern Africa as one of South Africa’s 300 most influential leaders.

Prof Hendrik Swart from the University of the Free State (UFS) Department of Physics was recently honoured at the Golden Key Honour Society Southern Africa’s Black Tie Gala Event, held on 23 May 2025. The event celebrated 300 of South Africa’s most influential leaders across academia, industry, government, and the financial sector.

Prof Swart, who is an NRF B1-rated researcher and currently also holds the SARChI Research Chair in Solid-state Luminescent and Advanced Materials (2023-2027), described the recognition as both meaningful and affirming at this stage of his academic journey.

“Being recognised by such a prestigious organisation is a meaningful acknowledgment of my academic efforts and personal dedication,” he says. “It was a moment of validation and inspiration, reminding me that hard work truly pays off.”

While the exact selection criteria were not publicly detailed, the emphasis was placed on academic excellence, scholarship, and leadership.

This is not Prof Swart’s first recognition from the Golden Key Honour Society. In 2012, the UFS student chapter awarded him honorary membership for his contributions as a mentor and supervisor – an early nod to his lasting impact on student success.

“The student chapter here on campus gave me some recognition by awarding me honorary membership,” he recalled. “It meant a lot to me as a mentor.”

The gala itself offered more than accolades – it created a space for meaningful exchange. Prof Swart reflected warmly on reconnecting with one of his former students from the early 2000s, calling it a highlight of the evening.

Looking ahead, Prof Swart welcomed the society’s plans to continue this initiative across the country.

“This was the first time they had an event like this, but more are expected to follow. I see it as a good initiative to mingle with other sectors in South Africa.”

News Archive

UFS venture cleans up acid mine drainage
2015-07-06

The system that puts oxygen back into the water.

Photo: Supplied

South Africa is one of the most important mining countries in the world, beginning in the 1870s. Although the mining industry has been responsible for significant development and employment, it pollutes the environment and waters sources. Through the joint effort of a well-known mining company, the University of the Free State, and the Technology Innovation Agency (UFS/TIA) SAENSE Group, a new treatment for Acid Mine Drainage (AMD) has been developed.

The system treats the major contaminants found in acid mining wastewater effectively.  
 
The UFS remediation systems use a reservoir tank into which the AMD is pumped. The water then flows passively (without using energy) to the Barium Carbonate Dispersed Alkaline Substrate (BDAS) system. The metals and anions in the AMD react chemically with the barium carbonate and precipitate (form solids). The solids stay in the tank while the clean water is released.

The efficacy and applicability of the research was demonstrated on site in Belfast, Mpumalanga where the team constructed a pilot plant in July 2014. This patented technology has treated 1 814 400 litres of Acid Mine Drainage to date with an outflow water quality that satisfies the South African National Standards (SANS) 241:2006 & 2011 regulations for drinking water.   

Rohan Posthumus from the (UFS/TIA) SAENSE Group said: “At this stage, we do not recommend that the water should be used as drinking water, but certainly it can lower water usage in mines while finding application in dust suppression of washing processes. The team would like to complete a full characterisation of the final released water. There are currently no toxic by-products formed, and even very basic filtration can make the outflow drinking water.”

Prof Esta van Heerden’s research group from the Department of Microbial, Biochemical, and Food Biotechnology has been working on AMD research for some time, but the development of the BDAS system was started in 2013 by post-doctoral student, Dr Julio Castillo, and his junior researcher, Rohan Posthumus.

The data from the BDAS system have led to two publications in peer-reviewed journals as well as a registered patent.

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