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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

Eusebius McKaiser talks about the magic of books
2013-03-19

 

Eusebius McKaiser
Photo: Johan Roux
19 March 2013

If you want to turn around this country in terms of the rot in education, you have to start reading. You have to read for your degree."

This was the message from writer and political analyst, Eusebius McKaiser, at a public lecture hosted by the UFS Library and Information Services to celebrate South African Library Week.

Addressing the audience that consisted mostly of students, McKaiser, author of “A Bantu in my bathroom,” said it is not too late to start reading.

"We claim we are too busy as adults, but what is the opportunity cost of not reading? I think we lose our humanity, our sense of awe in the world around us when we stop reading as adults. Instead of saying we are too busy, we will do well to ask ourselves what is the cost of no longer reading as much as we did when we were children."

Reading from some of his favourite books, McKaiser spoke about writing techniques and the magic of books. He read excerpts from JM Coetzee's book “Disgrace,” which he considers to be the most important South African novel. He also read paragraphs from books by Rian Malan, James Baldwin and K Sello Duiker – calling the latter a genius.

Reflecting on the role of fiction, McKaiser said the genre is misunderstood and not utilised sufficiently by academics. "We see fiction as something restricted to the English Department or literary departments. I think fiction can be used as a tool in many departments in the humanities. It gives more real material for exploring complicated questions in the humanities and thought experiments that resemble life."

McKaiser also discussed the role of librarians and writers, saying writers should write what they like, but should not ignore the context. "As academics, librarians, teachers, we have to write for the context in which we teach. We have to order books for the context in which we are librarians and as academics we must not write textbooks for students who live in New York. We have to write textbooks for students who come from townships.”

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