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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

State of our campuses: UFS extends vacation as from 28 September until 7 October 2016
2016-09-28

In solidarity with the call for free education for the poor and missing middle, a discussion was held with the University Management Committee this morning, in consultation with the student leadership, and after careful assessment of operational matters on all three campuses of the University of the Free State (UFS), we agreed upon the following:
 
1.    All classes, tests, and assignments will be suspended until Friday 7 October 2016. This means that the university will close on Wednesday 28 September 2016 for an extended vacation until 7 October 2016. The academic programme will resume on Monday 10 October 2016.
                     
2.    This will allow the entire university time to demonstrate solidarity, in collaboration with student leadership, academic and support staff, and the broader community in support of free higher education for the poor and missing middle.
                  
3.    The administration of the university will continue on Thursday 29
September 2016, and staff will have access to their offices to plan the additional academic support for students, to consider the re-scheduling of the academic calendar, to engage with the Department of Higher Education and Training in relation to the students’ demands, and to continue with support services during the extended vacation.
 
4.    The university management and student leadership will also, over the next three days, engage in discussions to provide for a platform that is conducive to continued collaboration between students and the university leadership.
 
5.    The suspension of tests, classes, and assignments will also allow time for a social compact and code of ethics for protests to be agreed upon and signed between student leadership and the university management.

 In respect of the Qwaqwa Campus, some protesting students yesterday intimidated others and forcibly removed staff, as well as security personnel. Today, university property was burnt. In view of our commitment to the safety of staff, students, and university property at the campus, it was necessary to evacuate the campus – including residences – with immediate effect. However, residential students are allowed to remain on campus until midday tomorrow (28 September 2016).

The university leadership again wants to emphasise its support for a national policy of free education for the poor and missing middle and stresses its support for peaceful protests on matters that are of concern to our students.
 
We further understand the frustration of many students and their parents/guardians at the closure of the campuses and the impact it has on academic staff, staff in the Support Services, our security personnel, teaching, learning, projects, assignments, lectures, tests, fieldwork, and the academic calendar in general, and commit to do all in our power to ensure the delivery of quality education to all our students under difficult circumstances.


Released by:
Lacea Loader (Director: Communication and Brand Management)
Telephone: +27 51 401 2584 | +27 83 645 2454
Email: news@ufs.ac.za | loaderl@ufs.ac.za
Fax: +27 51 444 6393

 

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