Microplastics are defined as fragments smaller than 5 mm. If these fragments are small enough, they may cross the human blood-brain barrier. Literature indicates that microplastics can adsorb heavy metals such as lead, copper, and zinc. The adsorption phenomenon means that microplastics can both be harmful on their own and act as a vehicle for introducing other toxins to the body. This study investigates a possible association between microplastic count and heavy metal concentration in drinking water samples and suggests a novel technique to achieve these results. Traditionally, microplastics are quantified through a sediment filtration and microscopy. The proposed method requires only one field sample to determine the presence of both pollutants, further refining the identification of microplastics in the field of community water quality. In the proposed method, water was treated with prepared microplastics and shaken with lead, copper, and zinc to simulate the conditions of a pipe system. The microplastic particles were isolated and treated with a chelating agent. After filtration, the filtrate was further extracted and analyzed using ICP-OES to determine heavy metal concentration. Microplastic count was obtained through microscopy. It is theorized that an increased microplastic count will be correlated with an increased concentration of heavy metals, putting communities with aging infrastructure at risk for heavily polluted drinking water. The methods are cost-effective enough to show promise of being replicated by other institutions, hopefully introducing a more standardized and accessible method for assessing water contamination.
Tapping Into Trouble: Investigating Microplastics and Heavy Metals in Birmingham’s Water
Category
Student Abstract Submission