Effect of iron oxide reductive dissolution on the transformation and immobilization of arsenic in soils: New insights from X-ray photoelectron and X-ray absorption spectroscopy

- Immobility and transformation of As on different Eh soils were investigated.
- μ-XRF, XANES, and XPS were used to gain As distribution and speciation in soil.
- Sorption capacity of As on anaerobic soil was much higher than that on oxic soil.
- Fe oxides reductive dissolution is a key factor for As sorption and transformation.