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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

UV belê in gehalte met strategiese fokusgroepe - Volksblad
2006-02-09

Verslaggewer
DIE Universiteit van die Vrystaat (UV) gaan vanjaar R10 miljoen beskikbaar stel om sekere van sy akademiese en navorsingsaktiwiteite in strategiese fokusgroepe te bedryf.

 

Volgens prof. Frederick Fourie, rektor en visekanselier van die UV, is hierdie ’n belegging in gehalte wat sal help om die UV nasionaal en internasionaal van ander universiteite in die wêreld te onderskei.

Tydens die amptelike opening van die UV verlede week het Fourie beklemtoon dat die strategiese fokusgroepe veel meer behels as net ’n herorganisering van gevestigde navorsingsgebiede.

“Sulke fokusgroepe behels ’n gefokusde deskundigheidsgebied en nie slegs navorsing nie, maar ook sterk voorgraadse en veral nagraadse onderrig en ’n potensieel sterk wetenskaplike grondslag vir samelewingsdiens.

“Strategiese fokusgroepe sal georganiseer word op die grondslag dat hierdie kennisgebiede op kort termyn die vlagskepe van die UV kan word. Dit beteken dat hierdie die gebiede is waarin die UV nou of in die toekoms waarskynlik ’n kompeterende voorsprong sal hê.”
Hy het gesê dit is belangrik dat die UV hom in die volgende fase van sy ontwikkeling posisioneer, nie net as ’n goeie onderrig- en navorsingsuniversiteit nie, maar ook as ’n universiteit wat in strategies belangrike kennisgebiede uitblink. Dit is noodsaaklik om energie en hulpbronne so te rig.

Nie alle akademiese en navorsingsaktiwiteite gaan egter hierdeur geraak word nie. ’n Breë ondersteuningsgrondslag is die afgelope paar jaar geskep vir uitnemende navorsing deur alle akademiese personeellede in hul eie navorsingsgebiede. Dié inisiatief sal naas die nuwe fokusgroepinisiatief steeds voortgaan.

Fourie sê die strategiese fokusgroepbenadering sal in lyn wees met die benadering wat ontwerp word deur die Nasionale Navorsingsraad (NNR) om nasionale prioriteite in berekening te bring. Breedweg is die vyf strategiese gebiede vir die UV voorlopig die volgende:
1. Voedselproduksie, voedselgehalte en voedselsekuriteit vir Afrika.
2. Ontwikkeling en streeksontwikkeling binne die Afrika-konteks.
3. Maatskaplike transformasie binne die Suider-Afrikaanse en Afrika-konteks.
4. Waterhulpbron- en ekostelselbestuur.
5. Tegnologie vir die toekoms. (’n Aparte fokusgroep rakende die chemiese nywerheid kan dalk bepaal word).

“Binne elk van hierdie gebiede kan ’n aantal nisgebiede geïdentifiseer word. Die fokusgebiede dek sowel die geestes- as die natuurwetenskappe, maar uiteraard kan en moet dit nie alles vir almal probeer wees nie,” sê Fourie.

Die presiese formulering en inhoud van die fokus- en nisgebiede sal nog bepaal word tydens gesprekke op die kampus. Dit sal met die hulp van kundiges buite die UV geskied.
Hy sê dit het sin dat ’n mediumgrootte universiteit soos die UV sy menslike hulpbronne, infrastruktuur, finansiële hulpbronne en intellektuele kundigheid sal konsentreer om te verseker dat ’n bydrae gelewer word tot Bloemfontein, die Vrystaat, die land en die Afrika-vasteland.

Hy sê van die uitvloeisels kan ’n belangrike impak op nywerheidsontwikkeling hê, byvoorbeeld in die chemiese bedryf, en dit mag ook ’n grondslag skep vir samewerking met provinsiale, nasionale en internasionale vennote.

Behalwe die R10 miljoen vir die vestiging van die fokusgroepe is daar die afgelope paar jaar groot bedrae beskikbaar gestel vir talle projekte om gehalte in onderrig en leer, in navorsing en ander gebiede te verbeter.

Berig verskyn in Volksblad - Dinsdag, 7 Februarie 2006

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