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

University publishes its Integrated Report
2013-08-23

23 August 2013

The university is proud to have published an integrated report in line with the King III requirements on corporate governance. The university is one of the first universities – if not the first – in South Africa to do so. The UFS sees integrated reporting as a public process through which we report to all our stakeholders, using evidence-based data, on the achievements and challenges of a public university.

Our first Integrated Report reviews the overall performance, non-financial and financial, of the UFS for the 2012 academic year. It is the first report of its kind delivered to stakeholders and guided by the King III framework which recommends integrated, sustainable performance that is reported in a way that enables stakeholders to make an informed assessment of an institution.

The Integrated Report notes that the conditions under which higher education institutions operate have become more demanding in the last two decades and there is a growing need for universities to be more explicit and transparent about the manner in which their core functions (teaching, research and public duty), as well as its administrative operations, are defined by and support good governance, sustainability and corporate citizenship.

The university welcomes this opportunity to present in public an integrated account of itself. In particular, the UFS sees this report as an opportunity to align more strongly its financial and non-financial reporting in pursuit of organisational sustainability and social transformation in South Africa.

Prof Jonathan Jansen, Vice-Chancellor and Rector, notes in the report that in the past four years the university has made significant progress in respect of its two foundational commitments, the Academic Project and the Human Project.

There are now more students entering the university who satisfy the higher requirements set for admission. “This will improve the throughput and graduation rates of incoming students, ensuring their personal success and satisfaction with higher education.” The establishment of a state-of-the-art Postgraduate School, for example, is expected to increase the number, quality and success rates of postgraduate students.

The research output has increased steadily and the contribution of the new Senior Professors project, as well as the five research clusters, have helped to improve the quality of research and the spread of postgraduate recruitment beyond South Africa.

On transformation, the Vice-Chancellor observes that “We have made significant progress in building inclusive, democratic and embracing campus cultures which affirm the value and dignity of all students and staff. With the steady increase of black students in a majority black campus, our goal remains to retain our diversity in a university that serves as an experiment in teaching students to live and learn and love together.”

Financial sustainability is a major commitment and the UFS has not only maintained its record of unqualified audits, but has steadily built a culture of risk management and performance evaluation throughout the system. Internal auditing is a strong instrument in our arsenal to secure financial and operational compliance in every department of the university.

“What integrates the systems and functions of the university is the alignment of everything we do with our two pillars, the Academic and Human Projects, built on a solid foundation of professional support services as described in the Strategic Plan adopted in 2012. In the process of preparing the Integrated Report we discovered how much still needs to be done to align the still disparate and independent activities of the three campuses, seven faculties and more than 100 departments of this large university,” according to the Vice-Chancellor.

The report is available at: http://www.ufs.ac.za/content.aspx?id=184.

 

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