Microplastic-Enhanced Chromium Toxicity in Scenedesmus Obliquus: Synergistic Effects on Algal Growth and Biochemical Responses

Microplastic-enhanced chromium toxicity in Scenedesmus obliquus: Synergistic effects on algal growth and biochemical responses

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This study found that polystyrene microplastics intensified the toxic effects of chromium, a heavy metal, on freshwater algae when both were present together. The combined exposure caused greater damage to algal growth, photosynthesis, and cellular defense systems than either pollutant alone. Since algae are the foundation of aquatic food chains, this synergistic toxicity could ripple through ecosystems and ultimately affect the safety of water and food sources for humans.

Individual and Combined Toxicity of Polystyrene Microplastics and Chromium in Artemia franciscana: Impacts on Survival, Growth, Biochemical and Physiological Responses

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A 21-day exposure study found that polystyrene microplastics and chromium individually and synergistically impaired survival, growth, protein levels, and antioxidant defenses in the brine shrimp Artemia franciscana, with combined toxicity exceeding either contaminant alone. This demonstrates that microplastics act as carriers and amplifiers of heavy metal toxicity in aquatic organisms, raising concerns about real-world ecosystems where both pollutants co-occur.

Effects of Microplastic on the Growth and Nutrient Absorption of Microalgae

Effects of microplastic combined with Cr(III) on apoptosis and energy pathway of coral endosymbiont

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Researchers found that polyethylene microplastics combined with chromium affected coral endosymbiont density, chlorophyll content, and key enzymes involved in apoptosis and energy metabolism, revealing compounded stress on reef-building corals.

The influence of microplastics on the toxic effects and biodegradation of bisphenol A in the microalgae Chlorella pyrenoidosa

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Researchers discovered that polystyrene microplastics worsen the toxic effects of the common chemical bisphenol A (BPA) on green algae, suggesting that microplastics in aquatic environments can amplify the harm caused by other pollutants and may have cascading effects on aquatic food chains.