Our current adsorbents have a limited capacity for adsorbing Panax notoginseng saponins (PNS).To address this issue, we synthesized a novel bioadsorbent called rosin polymer/diatomite microspheres (RPM/DT).This was done by doping diatomite (DT), an inorganic substance, with rosin-based organic compoundsPNSs adsorption capacity on RPM/DT is 427.96 mg.g-1, which is 6.5 times that of current adsorbents.RPM, without DT, displayed only 125.10 mg.g-1.This considerable difference in adsorption capacity can be attributed to the phys. incorporation of DT into and onto the surface of RPM/DT.In addition, the incorporation plays a crucial role in creating pores, resulting in a remarkable increase in the sp. surface area of RPM/DT (734.55 m2.g-1), surpassing that of RPM (405.17 m2.g-1).Addnl., using RPM/DT resulted in a significant increase in PNS purity, rising from 48.47% to 86.16%.We investigated the isotherm, kinetics, and thermodn. properties of PNS on RPM/DT and found that the adsorption is spontaneous, endothermic, and predominantly chemisorptive.Quantum chem. calculations further revealed the adsorption mechanism of PNS on RPM/DT.The functional monomer mols. RPM/DT interacted with Rb1, involving van der Waals forces, H-bonds, and intermol. electrostatic interactions.In summary, RPM/DT is an efficient and reusable biosorbent with the potential to be used in the separation and enrichment of PNS from crude solutions