Toxicological Assessment of Intermediates in Natural Attenuation of p-Xylene to Marine Microalgae
The toxic effects of p-xylene, 4-methylbenzyl alcohol, p-methyl benzaldehyde, and p-toluic acid on two marine microalgae (Phaeodactylum tricornutum Bohlin, and Skeletonema costatum) were investigated. p-Xylene was the most toxic to Pha. tricornutum with a 96 h EC50 value of 6.76 mg L−1. Based on the 96 h EC50 values for two microalgae, the toxicity of the four chemicals, in descending order, was: p-xylene, p-methyl benzaldehyde, 4-methylbenzyl alcohol, then p-toluic acid. The results showed that the toxicity of the transformed products of p-xylene was lower than that of p-xylene.
Keywordsp-Xylene Intermediates Marine microalgae Toxicity
This work was supported by the National Marine Hazard Mitigation Service, Ministry of Natural Resources of the People’s Republic of China through its Commissioned Research Scheme (Grant No. 2018AA019).
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