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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

More international recognition for Vice-Chancellor
2013-09-27

27 September 2013

Two international awards will be bestowed on Prof Jonathan Jansen, Vice-Chancellor and Rector of the University of the Free State (UFS), in the coming months for his dedication to Education.

These awards will add to the multiple international and local achievements and awards Prof Jansen has received this year.

He will join the ranks of laureates of Kappa Delta Pi (KDP) during the organisation’s 49th Biennial Conference in Dallas, Texas, from 24 to 26 October 2013. KDP is an international honour society in education, founded by Dr William Bagley at the University of Illinois in 1911. It was established to foster excellence in education and promote fellowship among those dedicated to teaching. KDP comprises 600 chapters and more than 40 000 members.

On 18 May 2014, the University of Vermont in the USA will confer an honorary doctorate on Prof Jansen for his passionate leadership in higher education and his contributions as scholar to benefit students across the world.

In June 2013, Prof Jansen received the Education Africa Lifetime Achievement Award for Africa in New York at a joint function of Education Africa and Brand South Africa. He joined a list of recipients including Sir Bob Geldof, Sir Richard Branson and Archbishop Emeritus Desmond Tutu. The Education Africa Lifetime Achievement Award for Africa is a highly-regarded recognition on the world stage, awarded to individuals who focus the attention of the global community on the obstacles some of the poorest African nations face.

The University of California in the USA awarded him the Alice and Clifford Spendlove Prize in Social Justice, Diplomacy and Tolerance. The award is made in recognition of persons who exemplify in their work the delivery of social justice, diplomacy and tolerance in the diverse local and global society.

Also in the United States, Prof Jansen has been invited to be Messenger Lecturer for Fall 2013 at Cornell University. He will give three lectures and interact with the students and staff of Cornell at various functions.

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