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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

Read a book SA encourages South Africans to read one book a month
2012-09-20

Campus Principal Dr Elias Malete on the left and Tebogo Ditshego's. With them are Betsy Eister, UFS Director: Library and Information Services and Mathene Mahanke from the Department of Sport, Arts, Culture and Recreation.
20 September 2012

'Read a book SA's" objective is to bring reading into the everyday lives of South Africans. Speaking at Writers’ Day on the Qwaqwa Campus of the University of the Free State last Thursday, Ditshego said reading was essential. “Of all the skills that anyone can ever have, reading is the most fundamental of them all. It improves one's attention, confidence and discipline, amongst others.”

Ditshego asked why South Africa is presently faced with a 25,2% unemployment rate compared to Germany's 6-8%, despite South Africa having more and better natural resources. The answer, according to him, rests with lack of knowledge and critical skills in South Africans.

“Out of 144 countries, South Africa is ranked 133th in as far as the delivery of quality education is concerned. The reason for this is that South Africans lack knowledge, as they do not read enough. Most South Africans read for information, which is different from knowledge,” Ditshego argued.

In his welcoming remarks, Campus Principal Dr Elias Malete challenged authors to continue reminding society of their responsibilities.

“It is also your duty and responsibility to teach diplomacy lessons, to teach about effective leadership that is accountable, fair and transparent,” said Dr Malete.

Amongst the established authors who shared their wisdom with budding writers was Dr KPD Maphalla, a Sesotho literature guru and custodian of Sesotho language and culture. UFS students and learners from Sekgutlong and Tiisetsang secondary schools had the opportunity to showcase their writing skills. They also received expert advice on manuscript development and publishing from Mathene Mahanke from the Free State's Department of Sport, Arts, Culture and Recreation.

The annual Writers' Day is a joint venture of the Campus Principal and the Library and Information Services (LIS).

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