Remobilization risk of Cd in aged pig manure biochar under rice rhizosphere influence: Evidence from six-season cultivation.
Biochar is widely used to immobilize cadmium (Cd) in contaminated paddy soils; however, the long-term stability of biochar-adsorbed Cd under rice rhizosphere influence remains poorly understood, raising concerns about its potential secondary release. Herein, we investigated the remobilization behavior and speciation ev...