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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

A bridge to the future for school leavers
2009-03-04

 
Ms Merridy Wilson-Strydom, Research Consultant at the Centre for Higher Education Studies and Development at the UFS. 
 Photo: Supplied)

Thousands of learners in the country’s high schools fail to qualify for post-school education and training. Now a unique project funded by the Ford Foundation and being piloted at the University of the Free State (UFS) seeks to provide such learners with a lifeline.

The 2008 Grade 12 results showed once again that the schooling system is – and has been for a long time – in the throes of a severe crisis. The most disturbing feature of this crisis is that the system does not produce learners with the required level of literacy, numeracy and other cognitive skills to further their education or to become part of the country’s workforce.

Clearly this situation is untenable in a developing country such as ours, facing the immense challenges of a severe skills shortage, poverty and unemployment. We cannot afford to have hundreds of thousands of young people walking the streets without any prospect of a decent living and a future of opportunity.

The UFS and partners in the Free State Higher Education Consortium (FSHEC) have devised a unique programme to help underprepared and even unprepared school-leavers who have fallen through the cracks of the school system.

“We are hoping to make a meaningful contribution to the challenging field of creating educational opportunities for post-school study and the world of work through the generous support of the Ford Foundation,” says Ms Merridy Wilson-Strydom, Research Consultant at the Centre for Higher Education Studies and Development at the UFS.

“The Skills for a Changing World Programme is specifically aimed at removing barriers to educational opportunities for school-leavers who are not able to access higher education – mainstream or extended degrees. At the moment there are few, if any, meaningful opportunities for those learners who come through the school system un/underprepared,” she says.

The primary target group for the NQF Level-5 Programme is young people between the ages of 18 and 25 who are currently excluded from post-schooling educational opportunities. The duration of the programme is one year.

According to Ms Wilson-Strydom, the core modules of the activity-driven curriculum are English Literacy and Language Development, Mathematical Literacy, Information and Communication Technology and Your Global Positioning System (YGPS), which focuses on study skills and critical life skills, e.g. dealing with diversity. Students will also be supported to make informed choices about their future study or career directions.

“The development of the core-module materials is almost complete and from the second semester we plan to test the programme by means of a pilot project, which will be conducted on the UFS’s South Campus in Bloemfontein,” says Ms Wilson-Strydom.

“The pilot study will involve a group of 20-50 learners who have finished Grade 12 but do not qualify for the UFS bridging programme known as the Career Preparation Programme or any other higher-education programmes,” says Ms Wilson-Strydom.

Although not yet accredited, the project team aims to have the programme accredited as a Higher Certificate and is also exploring the possibility of registering the programme as a Short Learning Programme.

“One of the challenges with access and bridging programmes in the country is that students do not obtain a formal qualification for their bridging year. Hence those who do not continue with higher-education study (or cannot continue for various reasons such as finances), do not gain the recognition they should get for what they have learnt during their bridging year.”

“Our focus on developing the Skills for a Changing World Programme as a qualification in its own right is a key innovation in the current education and training landscape,” says Ms Wilson-Strydom.

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  
4 March 2009
 

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