New insights into the effects of the herbicide imazethapyr on Cu(II) ecotoxicity to the aquatic unicellular alga Scenedesmus obliquus

- X-ray absorption spectroscopy was used to study the structure of the complex.
- Scanning transmission soft X-ray microscopy was used to study the distribution of Fe in cell.
- Direct microscopic and spectral evidence for the mechanisms involved were provided.
- Cu can induce the change of the distribution of essential trace element in alga.