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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

SAFOS seeks to integrate folklore studies into education
2015-10-15

From the left are: Bahedile Letlala, Dr Elias Malete, Hannetjie du Toit, Dr Sara Motsei, Dr Edwin Mohatlane and Prof Mogomme Masoga.

The University of the Free State was proud to host the national conference of the Southern African Folklore Society which took place on 7-9 October 2015 on the Bloemfontein Campus. The focus of the conference was on how to integrate folklore studies into the 21st century.

Keynote speakers for the conference included Prof Antoinette Tidjani-Alou (Professor of French and Comparative Literature at University Abdou Moumouni), Prof Mogomme Alpheus Masoga (University of Venda), and Prof Mohlomi Moleleki (University of the Free State).

The speakers approached their subjects in great detail, tackling issues surrounding identity, social cohesion, and orality on the African context. One of the main co-ordinators of this event, Dr Elias Malete from the Department of African Languages at the UFS, highlighted one of the speaker’s topics, which focused on the importance of harnessing a collectivistic culture, as the African context does not entertain individualism. When asked about how such a conference fits into the UFS context, and where it could be applied, Malete mentioned the burning issue of the language policy review. He believes that: “The language should be inclusive, in as much as our theme says we cannot entertain individualistic approaches, but need to include everybody.” This is achieved through working with the Language Departments,” he said.

In particular, the topic presented by Prof Moleleki from the Department of African Languages, explored how the self-perception of an African, both as an integral member of his society as well as an independent individual, not only informs but also underpins his identity.

In all the topic discussed, the importance of coherence, transparency, and correctness was noted.

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