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Table 2 Langmuir and Freundlich model parameters of different apatite at pH 5.5

From: Remediation of copper contaminated soil by using different particle sizes of apatite: a field experiment

Ce (mmol L−1) Material Langmuir Freundlich
KL Qm R2 P KF 1/n R2 P
0–10 NAP 43.15 742.9 0.9628 <0.05 592.1 0.1751 0.9500 <0.01
0–1 NAP 72.73 637.7 0.9815 <0.05 752.9 0.2439 0.9480 <0.01
0–1 MAP 20.84 232.4 0.9616 <0.05 243.6 0.2739 0.8882 <0.05
0–1 OAP 22.03 0.7455 0.9460 <0.05
  1. The adsorption isotherms of MAP and OAP in 0–10 mmol L−1 were not fitted by Langmuir and Freundlich models and OAP in 0–1 mmol L−1 were not fitted by Langmuir models, so their model parameters are not listed