Machakos: 14-Year-Old Girls Transform Maize Cobs into Water Solution

Young Innovators from Machakos Use Maize Cobs to Revolutionize Water Purification

At just 14 years old, Jemima Abuga and Shannita Nduku are making waves in the world of science. These two Grade Nine students from Tala SA Primary and Junior Secondary School in Machakos County have developed a low-cost water purification system using discarded maize cobs. Their invention is not only a testament to their ingenuity but also a potential solution to one of Kenya’s most critical challenges: access to clean and safe drinking water.

The idea came from an ordinary moment at home. Jemima noticed that when her younger sister disposed of maize cobs in a nearby dirty dam, the water appeared clearer after a few days. This simple observation sparked a scientific curiosity that led to months of experimentation and research.

With support from their teachers, the girls began testing different forms of maize cobs—powdered, activated charcoal, and more—to see how they could remove impurities from water. They used simulated contaminated water mixed with lead ions, methylene blue, and turbidity-causing particles. The results were promising: the water became clearer, and heavy metals were significantly reduced.

Their project has not only earned them recognition at the National Science Congress but also a trophy and certificates. However, for Jemima and Shannita, the real reward lies in the potential impact of their innovation on communities that lack access to clean water.

“We believe this method can help people who don’t have access to clean water. It’s cheap, safe, and uses something every household can easily find,” said Jemima.

Science teacher Moreen Okilo supports the girls’ vision. She believes that their solution could be a game-changer in areas like Kibra and other informal settlements where contaminated water poses serious health risks, including nerve disorders caused by heavy metals.

The school’s headteacher, Asumpta Kiswii, credits the institution’s internet connectivity for enabling the students to conduct deeper research and refine their ideas. This highlights the importance of digital resources in fostering innovation among young learners.

Matungulu sub-county director of education Lilian Gitahi praised the girls’ creativity and encouraged other schools to follow suit. She emphasized that the Competency-Based Curriculum (CBC) is about applying knowledge in practical ways.

While the girls are thrilled with their achievements, they hope to take their idea further. They dream of presenting their project to the government for large-scale implementation. “Everything is possible. An idea that changes one village can one day change the whole world,” said Shannita.

Other Innovations from Machakos

In addition to Jemima and Shannita’s groundbreaking work, another student from Katine Technical Training Institute in Machakos County has made headlines for his innovative approach to hair braiding. Daniel Mutie Kioko, a student at the institute, has been creating hair braids from sisal. His inspiration came from the need for an alternative to synthetic braids, particularly for women with allergies.

The process involves transforming raw sisal into a smooth and durable product. Daniel explained that the material is processed through several stages before it becomes ready for use. His creation offers a natural and eco-friendly option for hair styling.

These examples highlight the growing trend of young innovators in Machakos, who are using local resources to solve real-world problems. From water purification to sustainable beauty products, these students are proving that innovation does not always require expensive materials or advanced technology.

The Power of Observation and Education

Jemima and Shannita’s journey underscores the importance of observation and curiosity in scientific discovery. Their project began with a simple question: Could maize cobs purify water? Through experimentation and collaboration, they turned that question into a viable solution.

Their story also emphasizes the role of education in nurturing talent. Support from teachers, access to information, and a curriculum that encourages practical application all played a part in their success.

As these young innovators continue to explore new possibilities, their work serves as an inspiration to others. It shows that even the most basic observations can lead to meaningful breakthroughs, especially when paired with determination and the right resources.

In a world where access to clean water remains a global challenge, solutions like those developed by Jemima and Shannita offer hope. Their story is a reminder that innovation can come from anywhere, and that sometimes, the simplest ideas can have the greatest impact.