Sublethal and lethal toxicity assessment of lanthanum and gadolinium to Daphnia magna in a 7-day test method.

ABSTRACT: The use of rare earth elements has increased in recent years, leading to a rise in environmental concentrations. Despite the growth in number of studies regarding toxicity, knowledge gaps remain. For Daphnia magna, standardized test methods involve exposure periods of either 48 h or 21 days to assess toxicological effects. In this study, the exposure period was adjusted to 7 days to evaluate sublethal endpoints not measurable in 48-h tests. Additionally, this approach enabled us to obtain results within a shorter time frame than that required for 21-day tests. This study focused on the individual toxicity of lanthanum (La) and gadolinium (Gd) to Daphnia magna. We assessed mortality, feeding rate, somatic growth, and maturity under static conditions, modifying the media by adding MOPS buffe

SUBMITTER: Padilla Suarez EG 

PROVIDER: S-EPMC11802601 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature