Latest News Archive

Please select Category, Year, and then Month to display items
Previous Archive
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

Vice-Chancellor honoured with major awards
2013-05-02

02 May 2013

The University of the Free State (UFS) is proud to announce that Prof Jonathan Jansen, Vice-Chancellor and Rector, has been awarded a number of major awards recently.

The University of California in the United States 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.

“The committee was very impressed with the commitment that Prof Jansen has had to reconciliation and forgiveness as a way to build bridges and to find common ground. Prof Jansen is following in the steps of many of our greatest peace-time leaders and we support his efforts to bring understanding to all cultures,” said Mark Aldenderfer, chair of the awards committee and Dean of the School of Social Sciences, Humanities and Art at the University of California.

Prof Jansen also received the 2013 Academia Award at the Sixth Annual Ubuntu Lecture and Dialogue Awards Ceremony of the Turquoise Harmony Institute on 4 April 2013 in Johannesburg. The Institute aims to foster relations among different faith and cultural traditions to contribute to the well-being of humanity.

According to the organisers, “outstanding individuals who made noteworthy contributions to dialogue, peace and harmony in the society,” are given recognition during the ceremony. The awards are made in a number of different categories. Prof Jansen was among the recipients who included Graca Machel and the South African National Editors Forum (SANEF). Previous winners of Turquoise Awards include Ahmed Kathrada, Chester Williams, Dr Frene Ginwala and Prof Russel Botman.

On 10 May 2013, Prof Jansen was also honoured by Kappa Delta Pi International Honour Society in Education. He was awarded membership of the Laureate Chapter of the society founded in 1911 which “is comprised of men and women who have made distinguished contributions to education, and is limited to 60 living persons”. Prof Jansen joins an exclusive membership of 293 which includes such luminaries as Albert Einstein, Eleanor Roosevelt, Jean Piaget and George Washington Carver.

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.

“This is a significant honour and it will really allow members from across the university to get a deeper appreciation of the work you are doing at UFS and in South Africa more broadly,” said Prof Judith Byfield of Cornell’s Department of History and Director of Graduate Studies at the department’s Africana Studies and Research Centre.

On the local front, City Press published its inaugural 100 World Class South Africans on 28 April 2013. During a rigorous selection process, 100 of our country’s most extraordinary citizens who have achieved world-class status were chosen. Prof Jansen’s achievements procured him a place on this prestigious list in the category: Heroes and Mavericks.

We use cookies to make interactions with our websites and services easy and meaningful. To better understand how they are used, read more about the UFS cookie policy. By continuing to use this site you are giving us your consent to do this.

Accept