A Detailed Review Study on Potential Effects of Microplastics and Additives of Concern on Human Health

Claudia Campanale, Carmine Massarelli, Ilaria Savino, Vito Locaputo, Vito Felice Uricchio, Claudia Campanale, Carmine Massarelli, Ilaria Savino, Vito Locaputo, Vito Felice Uricchio

Abstract

The distribution and abundance of microplastics into the world are so extensive that many scientists use them as key indicators of the recent and contemporary period defining a new historical epoch: The Plasticene. However, the implications of microplastics are not yet thoroughly understood. There is considerable complexity involved to understand their impact due to different physical-chemical properties that make microplastics multifaceted stressors. If, on the one hand, microplastics carry toxic chemicals in the ecosystems, thus serving as vectors of transport, they are themselves, on the other hand, a cocktail of hazardous chemicals that are added voluntarily during their production as additives to increase polymer properties and prolong their life. To date, there is a considerable lack of knowledge on the major additives of concern that are used in the plastic industry, on their fate once microplastics dispose into the environment, and on their consequent effects on human health when associated with micro and nanoplastics. The present study emphasizes the most toxic and dangerous chemical substances that are contained in all plastic products to describe the effects and implications of these hazardous chemicals on human health, providing a detailed overview of studies that have investigated their abundance on microplastics. In the present work, we conducted a capillary review of the literature on micro and nanoplastic exposure pathways and their potential risk to human health to summarize current knowledge with the intention of better focus future research in this area and fill knowledge gaps.

Keywords: additives; human health; microplastics; nanoplastics.

Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Appearance of the deposition and stratification of plastic materials in a Spanish canyon (Source: [16]).
Figure 2
Figure 2
Layering of plastic materials in an area of Southern Italy.
Figure 3
Figure 3
Detail of the plastic stratigraphy.
Figure 4
Figure 4
Chemical structure of some classes of halogenated flame retardants.
Figure 5
Figure 5
Greater fields of use of brominated flame retardants (BFRs) (Source data: [135]).
Figure 6
Figure 6
Overview of scientific studies focused on the effects of micro and nanoplastics on human health. Colored squares represent pollutants (organic and inorganic) that could be present in environmental matrices (free or associated with micro and nanoplastics) and that could enter into the human body through different entry routes.

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