POLOKWANE – Makubu Mokgawa has graduated with a PhD in zoology from the University of Limpopo, dedicating the achievement to her late father who had always hoped for a doctor in the family.

Academic journey beginning in 2021

Mokgawa began her studies in 2021 and graduated last Saturday.

A mom to Lesego (18), Refiloe (7) and Kgosi (5), she described the journey as one of the most meaningful of her life.

A journey of resilience and growth

“It wasn’t just about academic achievement, but about growth, resilience, and pushing beyond my limits.

“There were a lot of challenging moments, but each of those shaped me into the person I am today,” she said.

Family pride and first-generation achievement

She said becoming the first doctor in her family made the milestone even more significant.

“It’s a humbling experience because I know I’m not just representing myself, but also my family’s hopes, sacrifices and dreams,” she said, adding that her brother believes she has “opened a door that others after me can walk through more easily”.

Research on microplastics in inland rivers

Mokgawa’s doctoral research focused on microplastics in South Africa’s inland river systems, an area with limited existing data.

She investigated the accumulation of polyethylene terephthalate (PET) microplastics in Mozambique tilapia (Oreochromis mossambicus).

Findings from the Olifants River System

Through laboratory trials and field assessments along the Olifants River System, her study found that PET microplastics accumulate in fish tissues, particularly in the liver and gut.

The research also showed a strong correlation between high microplastic concentrations and severe physiological stress in fish, including metabolic disruptions, tissue necrosis and death.

Academic presentations and acknowledgements

Mokgawa presented her findings at one international conference and three national conferences.

“I’d also like to thank my husband, my mom, brother and sisters for their unconditional love and support they’ve given me through this time. I appreciate each and every one of you.”