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24 August 2018 Photo Igno van Niekerk
Chemistry changing the world to create a better future
These practical applications of Chemistry are part of the relevant and practically applicable research Prof André Roodt (far left) and his research group are involved in. With him are Dr Ebrahiem Botha, Post-doctoral fellow; Pheelo Nkoe, PhD student; Shaun Redgard, MSc student; and Dr Orbett Alexander, Post-doctoral fellow

Some people have a gift for explaining the most complex concepts in a way anyone could understand. Combine this gift with passion, energy, and enthusiasm, and you are close to describing a meeting with Prof André Roodt

Prof Roodt not only teaches Chemistry, he lives it. He has published more than 320 papers, lectured internationally more than 100 times, and has guided 35 PhD and 48 MSc students to complete their degrees. These figures are likely to conjure up visions of a dusty academic working on pie-in-the-sky theories. 

Adding value

Within minutes you are made aware of the fact that Chemistry is not only a subject confined to classrooms and labs. It is a means of changing the world through research to create a better future. In academic terms, Prof Roodt and his team are involved in ‘Homegeneous Catalysis’, ‘Radiopharmacy: Theranostics’, ‘Metal Benefication’, and ‘Conversion of carbon dioxide and water’. And just when you start to remember how terrifying high-school Chemistry was, Prof Roodt explains the practical nature of what they are doing.

Few of us are aware of the exact processes that produce fuel for our cars, although we probably know that these processes have side effects which are usually detrimental to the environment; but what if the by-products of these processes can be turned into speciality chemicals which could add value in different ways?

Ever wondered how medication know where to go in your body? Well – just imagine highly specialised (clever) pharmaceutical agents giving off their own ‘light’, knowing exactly where to go, showing you where they are going, and knowing what to do in order to provide information and interact with specific cells in your body to assist in healing cells and fighting disease. Exciting.

Passionate people

But, as they say in the ads, that is not all; imagine better ways to generate power, using the natural processes in plants to increase natural oxygen where needed, and to be able to change oxygen levels in the environment.

These practical applications of Chemistry are part of the relevant and practically applicable research Prof Roodt and his research group are involved in.

When you leave Prof Roodt’s office, you realise that this is what the UFS is all about: Global impact. World-class research. Passionate people. And seizing the opportunity to create the future.

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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