Exploration of the bio-availability and the risk thresholds of cadmium and arsenic in contaminated paddy soils.

ABSTRACT: Cadmium (Cd) and arsenic (As) contamination risk in paddy soils has raised global concern. In order to scientifically and objectively evaluate the bioavailability of soil Cd, As and the risk of Cd or As threshold in contaminated farmland, this study was conducted to investigate different types of extractants for their potential extraction efficiency of Cd and As. Soils from two different parent materials in Hunan, Yueyang and Yiyang, typical double-cropping rice production areas in the south of China, were used as test soils. The extraction capabilities of 10 extractants (ultrapure water, 0.1 mol/L HCl, 1.0 mol/L NH₄OAc, CaCl₂-DTPA, 0.01 mol/L CaCl₂, 0.1 mol/L CaCl₂, 0.5 mol/L NaH₂PO₄, 0.05 mol/L NaHCO₃, 0.1 mol/L

SUBMITTER: Guan D 

PROVIDER: S-EPMC11665459 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature