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06 March 2019 | Story Ruan Bruwer | Photo Varsity Sports
Tharina van der Walt
Tharina van der Walt, a first-year student, won the hammer-throw item at the first Varsity Athletics meeting in Stellenbosch on Friday – the only gold medal for the Kovsies.

Hammer thrower Tharina van der Walt was the bright spark for the University of the Free State (UFS) at the first Varsity Athletics meeting in Stellenbosch on Friday.

Van der Walt, who recently turned 19 and is one of three first-year students in the UFS team of 25 athletes, bagged the only gold medal for the Free State students. She won the hammer throw with a distance of 53,12 m.

The UFS ended in fourth place behind NWU (first), UJ (second), and Tuks (third).

Six athletes achieved second places. Both Sokwakana Mogwasi (100 m) and Ts’epang Sello (800 m) came within a whisker of claiming victory.  Mogwasi lost the 100 m by 00:04 seconds, but in the process improved her personal best from 11,89 to 11,58. Sello (2:08,47) was in the lead for most of the 800 m but was eventually defeated by Niene Muller of Tuks by less than half a second.

Mogwasi was also second in the 200 m with a fast 24,92. Other silver medals were obtained by Yolandi Stander in the discus (52,70 m), Peter Makgato in the long jump (7,66 m), and Marné Mentz in a very fast 1500 m race. Mentz (04:26,63) chopped more than five seconds off her previous best time of 4:32,00. Her time was the third fastest ever in the 1 500 m at Varsity Athletics.

There were three third places: Sefako Mokhosoa (15,47 – triple jump), Petrus Jacobs (14,55 – 110 m hurdles), and the women’s 4x100 m relay team (Mogwasi, Elsabé du Plessis, Joviale Mbisha, and Micháela Wright).

Four athletes just missed out on podium positions, achieving fourth places.

The second Varsity athletics meeting will take place in Potchefstroom on 15 March 2019.

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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