Combined Toxicity of Multi-Walled Carbon Nanotubes and Cu²⁺ on the Growth of Ryegrass: Effect of Surface Modification, Dose, and Exposure Time Pattern.

ABSTRACT: The escalating release of multi-walled carbon nanotubes (MWCNTs) into the environment has raised concerns due to their potential ecotoxicological impacts. However, their combined phytotoxicity with heavy metals such as copper (Cu) is still unclear. This study investigated the individual and combined toxic effects of MWCNTs (MWCNT, MWCNT-OH, and MWCNT-COOH) and Cu²⁺ on ryegrass (Lolium multiflorum), uniquely considering different addition orders. The results show that Cu severely inhibited the growth of ryegrass while MWCNTs exhibited a hormesis effect on ryegrass. When MWCNT and Cu were combined, the malondialdehyde (MDA) content in ryegrass showed a 32.39% increase at 20 mg/L MWCNT exposure, suggesting reduced oxidative stress. However, at the higher concentration of 100

SUBMITTER: Xie W 

PROVIDER: S-EPMC11547606 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature