Fig. 11. (a) Changes of adsorption capacity with adsorption time for CR over the HPSCHMs sample at different temperature (adsorbent dose: 100 mg L⁻¹; pH = 7, initial CR concentration: 100 mg L⁻¹), and (b) thermodynamics fitting for CR on the HPSCHMs sample (adsorbent dose: 100 mg L⁻¹; pH = 7, initial CR concentration: 100 mg L⁻¹).