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

Trevor Manuel and Max du Preez among the recipients of honorary doctorates at UFS graduation
2016-07-02

Description: 4 Hon Docs Tags: 4 Hon Docs

The UFS awarded four honorary doctorates
at its Winter Graduation ceremonies.
The recipients are from left Max du Preez,
Dr Reuel Jethro Khoza, Prof Joel Samoff
and Trevor Manuel at the UFS Chancellor’s
Dinner on 30 June 2016.

Photo: Johan Roux

He is excited about the young minds he saw and interacted with at the graduation ceremony of the University of the Free State (UFS). This is what Max du Preez, one of South Africa’s leading journalists and political analysts, said after receiving an honorary doctorate.

According to Du Preez (Humanities), he was inspired by the Winter Graduation ceremony on 30 June 2016 in the Callie Human Centre on the Bloemfontein Campus. He is happy to finally also call the UFS his alma mater. He grew up in Kroonstad and is a true Free Stater, but previously graduated at the Stellenbosch University.

The UFS awarded four honorary doctorates – the others to Prof Joel Samoff (Humanities), Trevor Manuel and Dr Reuel Jethro Khoza (both Economic and Management Sciences) – and two Chancellor’s medals at the morning ceremony on 30 June 2016. Chancellor’s medals were awarded to Antony Osler and Marguerite van der Merwe (née Osler).

Manuel impressed by amount of soul

At the Chancellor’s Dinner, which was held in the Centenary Complex on the Bloemfontein Campus on 30 June 2016, Du Preez said he feels honoured. He said South Africans must embrace the diversity of the country, and the UFS is a good example. “If the University of the Free State can make it, South Africa can make it.”

Manuel, a former South African Finance Minister, said he is honoured by the amount of soul he experienced from Dr Khotso Mokhele, UFS Chancellor, and Prof Jonathan Jansen, Vice-Chancellor and Rector of the UFS. “We cannot tolerate what is wrong (in the country) and need to push the boundaries of what is right,” he said.

UFS stands out regarding understanding


Dr Khoza, a distinguished thinker and businessman, also thanked the UFS at the Chancellor’s Dinner. “We shall strive to be known less for what we say, but rather more for what we do,” he said about the country.
According to Prof Samoff, Professor in Africa Studies at Stanford University (USA), “South Africa has committed itself to building a democratic, non-racist, and non-sexist society”. “Where the University of the Free State stands out, is in its understanding that societal change – ‘transformation’, to use the current terminology – is not an outcome, but a process. A difficult process.”

 

Media Enquiries

Contact person: Lacea Loader (Director: Communication and Brand Management)
Tel: +27(0)51 401 3422/2707 or +27(0)83 645 2454
Email: news@ufs.ac.za | loaderl@ufs.ac.za
Fax: +27(0)51 444 6393

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