According to the analysis of XRD and EXAFS, we have identified the main Zn species formed on biochars. To examine these results, the pHs of the samples withdrawn at 2 h and the concentrations of CO32− and Si species in the samples withdrawn at 120 h in kinetics experiments were determined. For comparison, these determinations were also conducted on their corresponding blank samples (0.1 g of biochar + 25 mL of water). The concentrations of PO43−, Ca2+, and Mg2+ were also determined. The samples in kinetics experiments are denoted as B + Zn, and the blank samples are denoted as B.