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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 launches journal on name change
2008-11-14

 

At the launch of the journal on name change were, from the left: Prof. Johan Lubbe, research associate of the Unit for Language Management at the UFS and guest editor of the magazine, Dr Lucie Möller, expert on geographical names and place name expert - and also an occasional member of the United Nations' committee of experts, Dr Peter Raper, research associate of the Unit for Language Management at the UFS, and Prof. Theo du Plessis, Director of the Unit for Language Management at the UFS. The magazine is dedicated to Dr Möller.
Photo: Lacea Loader

UFS launches journal on name change

From all the language issues coved in the English and Afrikaans printed media, the name change of place names is receiving the most attention. This is according to Prof. Johan Lubbe, research associate from the University of the Free State’s (UFS) Unit for Language Management, during the recent launch of a journal on name change on the Main Campus in Bloemfontein.

In the journal it is found, among other, that, as a result of the nature of the new democratic foundation of the ANC controlled government which puts the interests of the majority first, there is a move in the thinking and execution of name change. In this way not only names change but art, culture and heritage matters are democratically thought through and planned.

“As a directive from the South African Language Board (Pansalb), the Unit for Language Management at the UFS annually compiles the SA Language Monitor which reports on the language rights situation in South Africa as mainly reported by the print media. Issues about name change appeared throughout and this is why the unit decided to publish a journal with various perspectives on this,” said Prof. Lubbe, who is also the guest editor of the journal.

Other topics discussed in the journal include, among others, language visibility, a historical overview of the change in place names, the Khoisan influence on naming and naming amongst Xhosa speakers.

In a contribution on language visibility it is found that geographical naming policy and the national language policy does not correlate and language visibility as language mechanism is not considered. In a historical overview on the change of place names it is found that name change was never a calculated, political process and only after 2000 mention was made of a conscious, orchestrated process of name change.

In a further contribution on the name change of Johannesburg International airport, it was found that the government, by ignoring the sentiments of the minority, made itself guilty of splitting the nation in spite of pronunciations that nation building is a priority. Where African languages are concerned, it was found that the English name is increasingly being discarded in favour of the Xhosa name. This is apparently connected to the language debate in South Africa.

The journal, “Kritiese perspektiewe op naamsverandering” (“Critical perspectives on name change”) is a supplement to the “Acta Academica”, an accredited national journal that is independently publishing selected research articles in the human sciences and interdissiplinary fields. Nine cooperators from across the country made contributions to the journal.

Media Release
Issued by: Lacea Loader
Assistant Director: Media Liaison
Tel: 051 401 2584
Cell: 083 645 2454
E-mail: loaderl.stg@ufs.ac.za  
14 November 2008
 

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