Dynamic Changes of Colloidal Cd in Wheat Rhizosphere: Implications for Cd Bioavailability in Alkaline Agricultural Soils
Abstract
Cadmium (Cd) contamination poses a serious problem in wheat fields. Although wheat is predominantly cultivated in neutral-alkaline soils, where Cd bioavailability is conventionally considered low, soil colloids constitute a dynamic Cd reservoir capable of releasing Cd 2+ for wheat adsorption. Argosol colloids (North China Plain) caused 1.6-fold higher Cd bioaccumulation in wheat than Aridosol colloids (Loess Plateau), despite having 2.1-fold less colloidal Cd and similar pH (∼9.0). Analysis revealed mineral-organic colloids >50 nm enhance Cd bioavailability via two pathways: disaggregation-released
Fields of Study & Subjects
Heavy metals in environment
Plant Stress Responses and Tolerance
Nanoparticles: synthesis and applications
Publication details
- Journal / source
- Journal of Agricultural and Food Chemistry
- Publisher
- American Chemical Society (ACS)
- Volume
- 74
- Issue
- 10
- Pages
- 8151–8161
- Publication date
- 5 March 2026
- Language
- EN