Fig. 4. (a and b) Adsorption kinetics of BPS and BPA onto COF-1 and COF-2 (C₀ = 30 mg L⁻¹, T = 303 K, t = 3 h, m/V = 0.2 g L⁻¹); (c and d) adsorption isotherm of BPS and BPA onto COF-1 and COF-2 at 303 K; (e and f) adsorption isotherms of BPS and BPA onto COF-2 at different temperatures (C₀ = 10–80 mg L⁻¹, T = 303–323 K, t = 24 h, m/V = 0.2 g L⁻¹).