World Environment Day is not just about oceans, it’s about everything to do with the environment, whether it is water or the food that we grow or the soil or the air. Anything that affects the environment.
This year’s theme is Beat Plastics Pollution to make people more aware of the harmful effects of plastic on the environment.
Extended Curriculum Programme coordinator in the Faculty of Applied Sciences Beatrice Opeolu drives activities to create awareness around climate change and the environment as the leader of the Climate Change and Environment Research Focus Area.
She teaches water quality management to Environmental Management and Environmental Health BTech students and recently she has started focusing more on environmental toxicology.
“This would be the study of poisons in the environment,” explained Opeolu.
For the last decade, Opeolu’s research concentrated on monitoring different kinds of pollutants in water and food samples, searching for the presence of heavy metals, phenols and polycyclic aromatic hydrocarbons (PAHs), perfluorinated compounds and pharmaceuticals.
(The dominant sources of PAHs in the environment are human activities such as wood-burning or combustion of biofuels, improper waste disposal).
She started off researching how the PAH level in food changes depending on how it is processed (fats are converted to PAH differently when food is grilled versus fried or boiled) and then moved on to checking PAH levels in freshwater systems. She discovered PAH levels were higher in the sediments than in the water, which means different effects for organisms that live and feed on sediment materials versus others in the water column.
Now she is moving from purely monitoring water to look at the entire cycle of exposure.
Specifically, she is concentrating on various pollutants in water, figuring out at what levels these pollutants become toxic to the environment. Not only does she want to investigate what pollutants are present but she wants to figure out what this means for the environment and what remediation can be affected.
“So the long-term plan is to be able to develop a material that we can use, as individuals and on an industrial scale, to remediate a combination of the pollutants. I’ve done research into heavy metals, several organic compounds including pharmaceuticals; so it would be great to have a single material that can remediate up to four pollutants because that would be more cost-effective,” said Opeolu.
She is currently setting up a laboratory space on the Bellville campus in the Horticulture department where she can oversee two or three postgraduate students. Here she will expose organism such as Daphnia (planktonic crustaceans specifically bred to be used in the laboratory), microalgae and bacteria to various pollutants in controlled environments.
Eventually, she wants to be part of a Water Institute on campus so that she can draw on the expertise of colleagues in various fields to develop water remediation systems and solutions.
* Today, 5 June is World Environment Day and the Applied Sciences Department hosts a Symposium on District Six Campus. Themed Beat Plastic Pollution, the symposium will feature six speakers talking about various effects of plastic pollution.
** On Friday 8 June renowned toxicologist Prof Augustine Arukwe from the Norwegian University of Science and will deliver a public lecture at the Saretec building on Bellville Campus followed by a panel discussion, between 12 am and 2 pm.
Written by Theresa Smith
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