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

Interpreting implemented at UFS residences
2007-10-12

The University of the Free State (UFS) has begun to implement interpreting services at student residence meetings on the Main Campus in Bloemfontein, as part of the management of diversity and the racial integration of its residences.

As a pilot project, the interpreting services are being offered since the third term at Emily Hobhouse and Roosmaryn ladies residences, where a significant racial diversity already is present. From next year this service will be extended to all the student residences on the Main Campus.

The interpreting project is being managed by the Department of Afro-asiatic Studies, Sign Language and Language Practice at the UFS.

“Students in training at the Department of Afro-asiatic Studies, Sign Language and Language Practice and senior interpreters from the UFS are currently interpreting during residence meetings,” said Prof. Jackie Naudé, Departmental Chairperson of the UFS’s Department of Afro-asiatic Studies, Sign Language and Language Practice.

“Students in these residences are given the opportunity to be trained to interpret during their residence meetings. Four students from each hostel are being trained as interpreters,” said Prof. Naudé.

According to Prof. Naudé both residences have meetings that take place on a Monday evening at 22:00. Interpreting is also provided at the first-year students’ meetings at Emily Hobhouse on Tuesday evenings.

The interpreters experience the interpreting at the residences as positively and they experience that students often do utilise this service. At Roosmaryn 16-18 students are utilising the interpreting service, while at Emily Hobhouse approximately 18 students are utilising the service.

“The interpreting service definitely contributes to the enhancement of communication during residence meetings. Students can exactly follow what is happening during the meetings. In the past a residences like Emily Hobhouse tried to repeat everything in English, which extended the meetings,” Prof. Naudé said.

With the envisaged extension of interpreting services in hostel meetings to all the hostels on the Main Campus in Bloemfontein, there is a need for interpreters as these meetings will take place simultaneously. Through this initiative, exiting new opportunities are created for aspiring interpreters. The training takes place under leadership of Prof. Annelie Lotriet who holds the ATKV Chair in Interpreting in the department.

Aspiring candidates can contact Mr Cobus Snyman, Manager of the UFS’s interpreting projects at 051 401 9005 in connection with the selection criteria for interpreters.

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 October 2007
 

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