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The influence of microplastics on the toxic effects and biodegradation of bisphenol A in the microalgae Chlorella pyrenoidosa
Summary
Researchers found that polystyrene microplastics inhibited the biodegradation of bisphenol A (BPA) by the microalga Chlorella vulgaris, with combined exposure showing greater toxicity than either contaminant alone due to BPA adsorption onto microplastic surfaces.
Abstract Bisphenol A (BPA) and Polystyrene (PS) microplastics have attracted much attention due to they were widely distributed in the environment, while their combined toxicity to aquatic organisms has rarely been studied. Therefore, this study explored that the impact of microplastics on the toxic effects and biodegradation of BPA to the microalgae Chlorella pyrenoidosa ( C. pyrenoidosa ). The results indicated that the presence of PS increased the growth inhibition of BPA and also accelerated the degradation efficiency of BPA in the medium of C. pyrenoidosa . When PS and BPA coexisted, the chlorophyll content and the Fv/Fm value decreased with the increased PS concentration due to the hermetic effect and shading effect. Moreover, this study also found that five intermediates were formed during BPA degradation process because of the presence of oxidoreductase and glycosyltransferase. The results of the study provided vital information on the effect of PS on the toxicity and biodegradation of BPA to microalgal.
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