While micronanoplastic pollution is among the most severe anthropogenic threats, ocean acidification is an equally concerning ecological issue. Several studies have highlighted the toxicological effects, interactions, and behavior of micronanoplastics across different environmental domains. However, their role in accelerating ocean acidification remains poorly understood. Ocean acidification refers to the decrease in seawater pH due to increased dissolution of atmospheric carbon dioxide into the ocean. This phenomenon poses a serious threat to marine life and ecosystem functioning. Based on current evidence regarding the behavior and interactions of micronanoplastics in marine systems, it can be proposed that these polymer particles may play a significant role in accelerating seawater acidification. This chapter focuses on exploring the evidence linking micronanoplastic pollution to ocean acidification and aims to comprehensively examine its causes, mechanisms, and consequences.
Athulya P. A., Chandrasekaran N. & Rajendran D., 2026. Insights into the role of micronanoplastics in accelerating ocean acidification. In: Chandrasekaran N., Marcos R. & Manzo S. (Eds.), Micronanoplastics: From Source to Sink, pp. 61-85. Elsevier. Chapter.
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