Abstract
Microplastic (MP) particles are becoming more prevalent in aquatic systems every year and are posing a global threat to several organisms. Several studies have reported the direct or indirect toxicity of heavy metals (HMs) and MPs on marine and freshwater organisms; however, the combined toxicity effects of HM and MP adsorption behavior are poorly understood. On the other hand, HM and MP particles are distinct environmental pollutants that persist for long periods. Previous research literature has suggested that MPs have strong relations with many organic pollutants, including polycyclic aromatic hydrocarbons, polychlorinated biphenyls, and HMs. The affiliation of MPs and HMs could change their ecological components, bioavailability, and potential toxic effects, leading to ecological risks. This chapter summarizes sources of HM pollution in the marine environment, the various factors that influence MP adsorption performance, the sorption mechanism, and the fate of MP adsorption on environmental pollutants. Further detailed investigation will be needed to understand the potentially toxic effects of adsorbed HMs on MP particles for various food traffic levels and human health.
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