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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

Faculty of Education hosts global education conference
2015-11-09



The Faculty of Education at the University of the Free State hosted the Annual conference of the South African Education Research Association (SAERA).  From the left are Profs André Keet, Director of the Institute for Reconciliation and Social Justice, Sechaba Mahlomaholo, Dean: Faculty of Education, Carlos Torres, keynote speaker and Professor of Social Sciences and Comparative Education, and former Director of the UCLA-Latin American Center, and Azlam Fataar, SAERA president.

National and global issues, trends, and research were discussed at the annual conference of the South African Education Research Association (SAERA), hosted by the Faculty of Education at the University of the Free State.

Considered as the highlight for educators, education researchers, and education policy makers, this conference is linked directly to the World Education Research Association (WERA), and to the American Education Research Association (AERA).

More than 400 delegates from national and international universities, as well as other interest groups such as the Department of Higher Education and Training of South Africa, have submitted abstracts on a variety of topics, spanning the different disciplines in education.

Keynote Speaker, Prof Carlos Torres, Professor of Social Sciences and Comparative Education, and former Director of the UCLA-Latin American Center, explained the importance of global citizenship education.

“The requirements to enable global citizenship education are clarification, bare essentials, principles, teaching methods, and agents. Global citizenship education is an intervention in search of a theory.”

Prof Torres's areas of theoretical research focus on the relationship between culture and power, the interrelationships of economic, political, and cultural spheres, and the multiple and contradictory dynamics of power among, and within, social movements that make education a site of permanent conflict and struggle.

Prof Teboho Moja, policy researcher and policy analyst for higher education in South Africa, spoke enthusiastically about changes taking place currently in higher education, changes that are driven by the recent demands of university students. Her keynote address dealt with equality and equity in higher education in South Africa.

“This conference is taking place whilst ‘something’ is happening in South Africa. This ‘something’ had to happen to achieve equity in higher education. Recent events on campuses left me proud to see the unity amongst students. Will the next phase in transformation and reform see that the doors of learning will be opened to all, as stated in the Freedom Charter?”

Prof Moja has authored articles on higher education reform issues in areas such as the governance of higher education, policy processes, and impact of globalisation on higher education.

“Hosting a conference of this magnitude validated the research work of the Faculty of Education in particular. It also positioned the Faculty positively in the national and international conversations around education research and gave the Faculty the opportunity to showcase its research, teaching, community engagement, and most importantly its organisational skills,” said Prof Sechaba Mahlomaholo, Dean of the Faculty of Education. According to Prof Mahlomaholo, staff (academic and support) in the Faculty have benefited greatly from listening to and networking with outstanding scholars from across the broad spectrum of education disciplines in the world. “These scholars also role modelled excellence in education research, which both our students and academic staff are now working towards emulating and surpassing,” he said.


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