Fig. 1.

Total adsorption capacity of Pb²⁺ by SIDF under the simulated gastrointestinal model (contact time 1 to 5 represent 0, 5, 10, 20, 30 min in simulated stomach; contact time 6 to 11 represent 0, 5, 10, 20, 30, 60 min in simulated small intestine)(a); Net adsorption process of Pb²⁺ by different SIDF samples in the simulated stomach (b) and simulated small intestine (c). SIDF-0, SIDF-40, SIDF-80, SIDF-120 and SIDF-160 indicates the SIDF was treated by DHPM under 0, 40, 80, 120 and 160 MPa, respectively