Harnessing Hemp: A Natural Solution for PFAS Removal in Water

Per- and polyfluoroalkyl substances (PFAS) represent a class of synthetic organofluorine compounds characterized by numerous fluorine atoms bonded to an alkyl chain. These chemicals are extensively utilized in the manufacturing of materials resistant to oil, heat, grease, stains, and water. The persistence of PFAS in the environment, coupled with their bioaccumulative nature, poses a significant threat as they can contaminate drinking water supplies. Our primary objective is to investigate the ability of hemp plants, when placed in a hydroponic system, to extract PFAS from water. This study leverages the bioaccumulative properties and hydrophilic nature of hemp, which make it well-suited for hydroponic growth. Specifically, we aimed to determine the extent to which hemp plants can extract perfluorooctanoic acids (PFOAs) from water. The experimental procedure commenced with the germination of hemp seeds using the wet paper towel method, where the seeds were placed between damp paper towels until sprouting occurred. Subsequently, we established a positive control comprising 228 microliters of PFOA diluted in 3 liters of spring water, along with a negative control consisting solely of 3 liters of spring water. Sixteen hemp plants were divided into two groups, with half assigned to the positive control hydroponic system and the remainder to the negative control hydroponic system.Throughout the experiment, samples were collected at three-day intervals to monitor the reduction in PFOA contamination. We anticipate that the hemp plants will significantly reduce the levels of PFOAs in the water. Results from the negative control group, which contained no PFOAs, should confirm the absence of PFOAs in the plants. Conversely, results from the positive control group, featuring a predetermined quantity of PFOA, are expected to indicate PFOA presence in the plants, signifying a decrease in water contamination. In conclusion, our research represents a crucial step towards ensuring access to clean water for all, addressing the pressing need as millions of people are projected to lack access to essential services by 2030 unless progress is substantially accelerated. By employing hemp hydroponics to eliminate harmful chemicals from water sources, we present an innovative and scalable solution with the potential to improve global water sanitation and public health.