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

New schools, restructuring part of streamlined Faculty of Health Sciences
2017-10-12

 Description: Health Sciences staff 2 Tags: Faculty of Health Sciences, five-school structure, Prof Gert van Zyl, Pathology, Biomedical Sciences  

From the left, front are: Dr Jocelyn Naicker,
Prof Gert van Zyl, Prof Magda Mulder;
back from left: Prof Chris Viljoen,
Marlene Viljoen, Deputy Director: Faculty of Health Sciences;
Prof Nathaniel Mofolo; and Prof Santie van Vuuren.
Photo: Rulanzen Martin


Numerous developments, such as the creation of two new schools and one newly restructured School of Medicine in the Faculty of Health Sciences at the University of the Free State (UFS), will catapult this renowned faculty to even greater heights.

Five-school structure to increase access
 
A five-school structure was proposed at the annual Faculty Management retreat in July 2016. The previous three-school model included the Schools of Medicine, Nursing, and Allied Health Professions.

The current School of Medicine has been restructured and will henceforth be known as the School of Clinical Medicine. The Schools of Pathology and Biomedical Sciences have been added to the faculty. “So, three new schools were in fact created within the faculty,” said Prof Gert van Zyl, Dean of the faculty.   

“There was also a request from the National Health Laboratory Services to group academics that is rendering services in pathology into a new School of Pathology.” This is what motivated the faculty management to create two new schools.

Esteemed academics appointed 

With the creation of the new schools, there were also new appointments within the Faculty of Health Sciences. Dr Jocelyn Naicker has been appointed as the new part-time Head of the School of Pathology, Prof Chris Viljoen was appointed as the part-time Head of the School of Biomedical Sciences, and Prof Nathaniel Mofolo as the new Head of the School of Clinical Medicine. Prof Santie van Vuuren remains Head of the School of Allied Health Professions, and Prof Magda Mulder as the head of the School of Nursing. 

Research outputs to remain as usual
The addition of the new schools will not impact research output. “In the past, research was done across departmental boundaries between all the departments in the faculty,” Prof Van Zyl said. The advantages of adding two additional schools are that the workload will be distributed among the five schools. The heads of schools will work within their respective disciplines and related areas, and will eliminate the duplication of administrative functions.

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