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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

Ghanaian academic speaks about next generation of African scholars
2013-10-08

 

Attending the seminar were from left: Adv Erika Cilliers, Sisa Mlonyeni (both from the Office of the Public Protector), Prof Adomako Ampofo and Prof Heidi Hudson, Head of the Centre for Africa Studies.
Photo: Jerry Mokoroane
08 October 2013

Prof Akosua Adomako Ampofo, one of the Centre for Africa Studies’newly-appointed advisory board members, addressed students and staff on 3 October 2013. Her topic Are you the scholar Africa needs?enthralled the audience with the passionate way in which she argued for nurturing activist-scholars rather than scholars who simply produce knowledge for the sake of it. “It is more urgent than ever before that … we do not simply see our roles as researchers and teachers, but that we are committed to impacting our communities” for the better – also by “making our knowledge production globally visible,” she argued. Africa is said to contribute less than 0.5 percent of the world’s scientific publications. The fact that most of these – and nearly all of the social science production – emanate from just three nations (Egypt, Nigeria and South Africa) means that many countries are absent from the radar.

According to her, the next generation of African scholars will have to compete within a hostile terrain where private universities are proliferating and costs of higher education are on the rise. These scholars will have to possess 22nd century skills, but a 20th century heart and sensitivity for the continent and its people.

Drawing on Kwame Nkrumah, Prof Ampofo proposed three guiding principles for becoming the scholars Africa needs. Firstly, by having a passion for knowledge as well as an Africa-centred knowledge – “nobody can tell our stories better than we can.”. Secondly, to translate our research into outputs not only in the form of internationally-recognised publications, but also in popular sources that will be read by a much wider public. And lastly, to carrying the torch for teaching and learning in the classroom – preparing our students to serve Africa or, as Nkrumah said, producing “devoted men and women with imagination and ideas, who, by their life and actions, can inspire our people to look forward to a great future.”.

Akosua Adomako Ampofo is a Professor of African and Gender Studies, and Director of the Institute of African Studies at the University of Ghana, Legon. An activist-scholar, her current work addresses African knowledge systems; race, ethnicity and identity politics; gender-based expressions of violence; constructions of masculinities; women and work; and popular culture. She is currently co-editing a volume titled, Transatlantic Feminisms: Women and Gender in Africa and the African Diaspora.In 2010, she was awarded the Sociologists for Women in Society Feminist Activism Award.


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