Impact of Co-Contaminants (Microplastics and Others) on Heavy Metal/Metalloid Toxicity and Accumulation in Plants

Abstract

Ecosystem and environmental degradation have been escalated, resulting in significant contamination of agricultural soils with heavy metals, metalloids, and co-contaminants such as microplastics. This article examines the influence of co-contaminants, particularly microplastics, on the toxicity and accumulation of heavy metals and metalloids in plants. Heavy metal contamination, including cadmium (Cd), arsenic (As), and lead (Pb), presents significant risks to plant development, agricultural productivity, and food safety. The presence of co-contaminants, such as microplastics, further complicates the problem by interacting with heavy metals, altering their behavior and enhancing their absorption by plants. The article analyzes current studies on the effects of microplastics, in conjunction with toxic metals, on plant health. Microplastics may facilitate the absorption of heavy metals by plant roots, modify soil properties, or enhance the bioavailability of specific metals, hence increasing their accessibility to plants. This combination often results in heightened toxicity, oxidative stress, and alterations in plant metabolism. This article examines how the interplay of microplastics and heavy metals might intensify detrimental effects on plants, leading to elevated metal accumulation in consumable plant tissues and heightened risks to human health. This study underscores the importance of including heavy metals and microplastics in environmental, forestry, and agricultural research by examining their synergistic effects. It promotes comprehensive research and the advancement of sustainable plantation, agroforestry and agriculture techniques to protect plants from the cumulative threats posed by these pollutants, ensuring safer and healthier food production for future generations.