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

UFS warmly welcomes prospective students at Open Day
2016-05-19

Description: 2016-05-14 Open Day Blfn Tags: 2016-05-14 Open Day Blfn

Prospective students of 2017 were treated to an Open Day filled with various activities on the Bloemfontein Campus of the University of the Free State.
Photo: Johan Roux

"There is a great deal of political and financial pressure on universities in South Africa, and that is exactly why the country’s future leaders need to be trained at the top universities."

With these words, Prof Jonathan Jansen, Vice-Chancellor and Rector of the University of the Free State (UFS), welcomed prospective students in the Callie Human Centre on the Bloemfontein Campus as part of the Open Day held on 14 May 2016. The UFS is a place where students can fulfil their dreams.

Learners were welcomed warmly on a cold day filled with various activities, and invited to become part of the Kovsie family. Prospective students were treated to many surprises, like a laser show and a performance by South African Music Award-nominated artist, Kyle Deutsch, who performed his popular crowd hit, ‘Back to the beach’, at the informal welcoming ceremony.

Examples of true Kovsies

Prof Jansen said at the official welcoming that graduating from the UFS does two things: It gives a student a Kovsie degree, and it helps to make them decent human beings in a divided country. He encouraged the learners to be as humble as the World 400m champion, Wayde van Niekerk, and to love without borders like Tanya Calitz, the Kovsie Dux of 2015. They are examples of what it means being a true Kovsie.

An information centre – which included on-site applications and a stall with KovsieGear merchandise – was stationed in the H van der Merwe Scholtz Hall, while residences and student associations also had stalls on campus. In the Main Building, parents were able to meet Prof Jansen.

Deans and faculties encourage

Apart from various presentations and interaction with staff, the learners were also welcomed by the deans of their faculties. Prof Danie Vermeulen, Dean of the Faculty of Natural and Agricultural Sciences, said they must study what they love. “Live your own dream. That is why you come to university.”

“The UFS Faculty of Education is a training centre for leaders. We develop leaders with a commitment to serving the community,” said Prof Sechaba Mahlomaholo, Dean of the Faculty of Education.

Click here to see a highlights video of the Bloemfontein Campus Open Day, or here for a video of the Qwaqwa Campus Open Day.

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