Table 1 Adsorption isothermal parameters of PO₄^3- on plane trees’ bark biochar/ZnAl-LDH (10 mg adsorbents, 25 mL of 20–150 mg/L PO₄^3-, 6 h, 25 °C).

Temperature/℃

Langmuir

Freundlich

\(\:{\varvec{Q}}_{\varvec{m}\varvec{a}\varvec{x}}\)

/(mg·g⁻¹)

\(\:{\varvec{k}}_{\varvec{L}}\)/

(L·mg⁻¹)

R²

\(\:\varvec{k}\)_F

/(mg^1−1/n·L^1/n·g⁻¹)

\(\:\frac{1}{\varvec{n}}\)

R²