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(A) The fractioning of Cd was tested as the incubation proceeded for 30 days. (B) The residual fraction percentage for four CnZVI groups after 30 days, where CnZVI/0 corresponds to CnZVI-6 with 0 mg/kg CA, CnZVI/1 corresponds to CnZVI-6 with 50 mg/kg CA, CnZVI/5 corresponds to CnZVI-6 with 250 mg/kg CA, and CnZVI/10 corresponds to CnZVI-6 with 500 mg/kg CA.
