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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

UFS hosts first International Congress on Calvin Research in Africa
2010-08-31

Present at the Calvin Research Conference were, from the left: Dr Frank Ewerszumrode (OP), Faculty of Catholic Theology at the University of Mainz in Mainz, Germany; Prof. Dr Herman Selderhuis, President of the International Congress on Calvin Research; Prof. Dolf Britz, Director of the Jonathan Edwards Centre Africa at the UFS; and Ntabanyane Tseuoa, Masters student in the Jonathan Edwards Centre at the UFS.
Photo: Leonie Bolleurs

The first International Congress on Calvin Research in Africa was this week presented on the Main Campus of the University of the Free State (UFS) in Bloemfontein. This was the tenth Calvin Research Conference presented. The conference is presented every four years.

The theme of the congress was: Reconciliation in the Theology of Calvin. Presentations were made about, amongst others, Calvin’s viewpoint regarding slavery and social justice. There was also a discussion about the extraordinary interest to record the original Calvin texts in databases and to make it available to researchers worldwide.

According to Prof. Dolf Britz, Director of the Jonathan Edwards Centre at the UFS, the objective of the congress was to study original Calvin sources critically. “An important part of the congress’ work is to publish an important part of Calvin’s work in a comprehensive text critical edition. This process is already well advanced and includes a number of unknown texts,” said Prof. Britz.

With its research on Calvin, the UFS emphasises the study of original theological sources. “This approach makes the Faculty of Theology part of the UFS’s strategy towards internationalisation. This is also one of the reasons why the UFS was selected by Yale University in America as partner in the recent establishment of the Jonathan Edwards Centre Africa,” said Prof. Britz, whose brainchild it was to also include young upcoming researchers with the study of original sources and classical languages such as Latin.

The congress was attended by researchers and academics from across the world. Twenty young, emerging researchers formed part of this group that was invited by the UFS. According to Prof. Britz, these young researchers are the top achievers at their respective universities, such as the North-West University, Stellenbosch University, Mukanyo Theological College in the Pretoria area and the UFS.

At this event, attended by more than 70 world-renowned Calvin scholars from countries like, amongst others, Taiwan, Japan, South Korea, Finland, Switzerland, France, The Netherlands, America, Germany and Hungary; UFS academics like Prof. Eric de Boer, Extraordinary Professor in Classical and Reformed Theology and students like Rev. Ntabanyane Tseuoa from Lesotho, read and presented papers as well.

According to Prof. Britz this congress was a very good opportunity to introduce the UFS to the rest of the world.

Media Release
Issued by: Mangaliso Radebe
Assistant Director: Media Liaison
Tel: 051 401 2828
Cell: 078 460 3320
E-mail: radebemt@ufs.ac.za  
31 August 2010
 

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