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23 November 2021 | Story Leonie Bolleurs | Photo Tania Allen
Dr Jana Vermaas and Ketshepileone Matlhoko are working on research that leaves your washing clean and fresh without the use of any detergents, which is also beneficial to the environment.

Cold water or hot water? Omo or Skip? Laundry blues is a reality in most households and when you add stains to the equation, then what was supposed to be part of your weekly household routine, becomes frustrating and time consuming. 

Researchers at the University of the Free State (UFS) are conducting research that is putting a whole new environmentally friendly spin on laundry day.

Sustainability and environmental conservation

Dr Jana Vermaas, Lecturer in the Department of Sustainable Food Systems and Development at the UFS, is passionate about textiles and sustainability – almost a decade ago, she conducted a study on the efficacy of anolyte as a disinfectant for textiles.

She describes the process: “During electrochemical activation, a dilute solution of natrium chloride/salt passes through a cylindrical electrolytic cell where the anodic and cathodic chambers are separated. Two separate streams of electrochemically activated water are produced. Anolyte as water was produced at the positive electrode and has a low pH, high oxidation-reduction potential and contains dissolved chloride, oxygen, and hydroxyl radical. It also has an antimicrobial effect.”

The benefits of this process are in line with her enthusiasm for environmental conservation. 

According to Dr Vermaas, the amount of water and chemicals used to clean textile articles is massive. “Chemicals used to disinfect, for example, hospital laundry, are hazardous. Not all laundries in the industry have a closed loop system or try to remove the chemicals before the wastewater is discarded.”

“Different amounts of detergents have various effects on our fauna and flora. Due to their low biodegradability, toxicity, and high absorbance of particles, detergents can reduce the natural water quality, cause pH changes in soil and water, lead to eutrophication (too many nutrients), reduce light transmission, and increase salinity in water sources.”

“But with the catholyte and anolyte process, water returns to its original status, which means that the water solution becomes inactive again after production where it existed in a metastable state while containing many free radicals and a variety of molecules for 48 hours. Thus, no chemicals are left in the wastewater. The water can therefore be recycled, not as potable water but, for example, to flush toilets or to water plants.

“We should do what we can to save water,” she says. 

Should you, like Dr Vermaas, also feel strongly about protecting the environment and want to obtain one of these machines that leaves your washing clean and fresh without the use of any detergents, you will be able to find such an appliance in South Arica. However, it does not come cheap. “It is a bit costly for residential use, but might be more accessible in the future,” states Dr Vermaas, who is of the opinion that it is a more sustainable option for commercial laundries.

Detergency properties and colourfastness 

Recently, more research has been conducted on this topic, but with a focus on the detergency properties of the catholyte to clean different textile fibres (natural and synthetic). Catholyte, she explains, is water produced at the negative electrode with a high pH, low oxidation-reduction potential, containing alkaline minerals. It also has surface active agents that increase the wetting properties, and it is an antioxidant. 

“A master’s student in the department, Ketshepileone Matlhoko, will be submitting her dissertation at the end of November on the possibility of using the catholyte as a scouring agent to clean raw wool,” says Dr Vermaas. 

The department is also conducting studies to investigate the influence of both catholyte and anolyte on colourfastness.

*Graphic: Production of electrolysed water (Nakae and Indaba, 2000). Diagram: Supplied



News Archive

Wayde, Karla crowned as KovsieSport’s best
2015-10-21

 

The pride of KovsieSport. From the left, are: Ox Nche
(UFS Junior Sportman of the Year), Karla Mostert
(Senior Sportswoman of the Year), Wayde van Niekerk
(Senior Sportsman of the Year), and Brett Walraven
(on behalf of his sister, Nicole Walraven – Junior Sportswoman of the Year).
Photo: Hannes Naude

The journey does not belong to him alone, but to everyone at KovsieSport.

These were the words of University of the Free State’s (UFS) Wayde van Niekerk, after being named as KovsieSport’s Senior Sportsman of the Year on Wednesday 21 October 2015.

The South African sports star walked away with the award for the third consecutive year, while the Protea netball defender, Karla Mostert, was crowned Senior Sportswoman for the first time.

The Junior Bok, Ox Nche, and the Protea hockey player, Nicole Walraven, were named as Junior Sportsman and Junior Sportswoman of the Year respectively.

Nche represented South Africa’s U20 rugby team this year at the Junior World Championships, played for the Shimlas, and was named the UFS Rugby Club’s best junior player.

Walraven made her debut for South Africa in 2015. She was crowned jointly as the best player at the Provincial U21 tournament, and was also Hockey South Africa’s U21 Player of the Year.

Van Niekerk won gold in the 400 metres at the World Championships in Beijing, becoming only the fourth athlete in history to run the 400 m in less than 44 seconds, and the 200 metres in less than 20 seconds.

“This is precious, and something I will cherish as an athlete: being part of KovsieSport,” he said.

“I arrived at the UFS as a high school boy, started as a junior, and was accepted immediately.”

“I really appreciate everybody who played such a huge part in my life.”

Mostert was named as Player of the Series in the Brutal Fruit series, as well as the Varsity series this year. She was also a star for the Proteas at the World Cup.

“This (the award) is definitely a good way to end my time at Kovsies. This is something one is trying to achieve for years, so it really is a highlight.”

She said it was difficult to describe how much KovsieSport is doing for its athletes, and this was the reason why the UFS achieves so many successes in sport.


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