Yang, Danxing and Fang, Wen and Zhang, Hao and Gu, Xueyuan and Chen, Haiyi and Sun, Haitao and Luo, Jun (2024) Migration and Availability of Ni and Cd in Industrial Soils Under Different Leaching Conditions : Insights from DGT and DIFS Models. Journal of Hazardous Materials, 480: 135863. ISSN 0304-3894
Full text not available from this repository.Abstract
Rainfall runoff can mobilize heavy metals in industrial soils, posing environmental risks. The mobility and distribution of heavy metals in different industrial soil layers are often overlooked. This study employed dynamic leaching experiments in layered soil columns with DGT (the diffusive gradients in thin films) measurements and DIFS (DGT-induced fluxes in soils and sediments) model to describe the migration, availability, and resupply ability of metals at different depths in surface and deep soil columns of industrial soils. Results showed significantly higher available concentrations (C DGT and C Soln) of Ni and Cd in surface soils compared to deep soils, likely due to the differences in soil physiochemical properties (contamination, pH, and soil texture). Continuous leaching promoted the migration of available Ni and Cd in surface soils. Maximum values of R Ni (0.79–0.91) and R Cd (0.75–0.80) were observed in the top layer (0–4cm) of the surface soil, consistent with the trends of R Fe. Combined DGT and DIFS model analysis implied higher potential availability and resupply of Ni and Cd in surface soil columns. These findings highlight the importance of considering dynamic leaching effects on heavy metal transport, availability, and release in industrial soils.