Abstract
Heavy metal pollution, driven by industrialization, urbanization, and inadequate waste management, poses significant environmental and health risks. Toxic elements such as lead (Pb), mercury (Hg), cadmium (Cd), and arsenic (As) persist in ecosystems and bioaccumulate within biological systems, leading to severe health effects. Major contamination sources include industrial processes, agricultural practices, and improper waste disposal. Unlike organic pollutants, heavy metals do not degrade over time, allowing long-distance transport and deposition in soils and sediments. Traditional remediation methods often generate secondary waste, while adsorption techniques face material regeneration challenges. Natural chelating agents like chlorophyll, integral to photosynthesis, offer a promising alternative due to their ability to form stable complexes with heavy metals, reducing their bioavailability and toxicity. This study explores chlorophyll's potential in sequestering heavy metals through Density Functional Theory (DFT) to analyze the electronic structure and bonding characteristics of metal-chlorophyll complexes, aiming to develop sustainable and eco-friendly remediation strategies.
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