Turning science into solutions for safer water

What if a simple, affordable sensor could help detect toxic metals in the water we depend on?

This is the focus of research being advanced by Dr Kgotla Masibi, a postdoctoral researcher at the National Research Foundation-iThemba Laboratories for Accelerator-Based Science (NRF-iThemba LABS), who recently showcased his work at the 2026 Annual Young Scientists Conference (AYSC), held from 13–15 September at Walter Sisulu University’s Mthatha Campus in the Eastern Cape.

Organised by the Academy of Science of South Africa (ASSAf), the conference brought together early-career researchers, academics and industry stakeholders to share research and explore solutions to pressing societal challenges.

Under the theme “Assuring Sustainable Water Availability and Safe Sanitation Systems to Achieve the Goals of Agenda 2063,” Dr Masibi delivered an oral presentation titled “Silver Nanocomposite for Rapid Detection of Heavy Metal Contamination in Water.”

His research explores the development of a low-cost, sustainable and portable sensor capable of detecting toxic heavy metals, particularly lead (Pb²⁺) and cadmium (Cd²⁺), in water. These contaminants pose serious environmental and public health concerns, highlighting the importance of accessible technologies for monitoring water quality.

The research developed a silver nanocomposite sensor that demonstrated strong performance in detecting the targeted metals and successfully quantified them in tap-water samples. The study also points to the potential of the technology for water-quality monitoring in resource-limited settings.

Beyond presenting his research, Dr Masibi used the conference to connect with the wider scientific community. “The most rewarding part of my research journey has been the opportunity to connect with fellow researchers, both locally and internationally,” he says. “While much of my work is laboratory-based, I have been pleasantly surprised by the level of interest it has generated within the scientific community. It is particularly fulfilling to see how research can spark meaningful discussions, create opportunities for collaboration, and demonstrate the potential to address real-world challenges. Knowing that my work can contribute to broader scientific and societal impact has been incredibly motivating.”

Looking ahead, Dr Masibi is focused on bridging the gap between laboratory discovery and real-world application.

“As a materials scientist with a passion for developing innovations that benefit society, the big question I would still love to answer is: how do we successfully translate promising laboratory research into tangible technologies that people can use in their everyday lives?” he says. “I am particularly interested in seeing our proof-of-concept studies evolve into functional prototypes and, ultimately, commercial products for environmental monitoring – that would be a highly fulfilling achievement in my research career.”

Dr Mlungisi Nkosi, Head of the Materials Research Department at NRF-iThemba LABS, says he is encouraged by the direction and impact of Dr Masibi’s work.

“His work on developing a green-synthesised silver nanocomposite for the rapid detection of toxic heavy metals addresses an important environmental and societal challenge, particularly the need for affordable and sustainable water-quality monitoring solutions,” says Dr Nkosi. “What is particularly encouraging is the progress demonstrated through his research in the past two and a half years, including the high sensitivity, stability and selectivity of the developed sensor, as well as its successful application to real water samples.”

The HOD added that Dr Masibi’s participation at the AYSC provided an important platform to share these findings and demonstrate how research conducted at NRF-iThemba LABS can contribute to addressing challenges that directly affect communities.

He encouraged Dr Masibi to continue pursuing this important research with the same commitment and curiosity.

“I also encourage other young researchers at NRF-iThemba LABS and elsewhere to pursue research that not only advances scientific knowledge but also seeks practical solutions to challenges facing society,” he says. “Through such research, we can strengthen the impact of science and contribute meaningfully to sustainable development in South Africa and across the continent.”