Aspirin Zinc

The challenge of separating and recovering V(V) and Cr(VI) from wastewater is critical for environmental protection and industrial productivity due to the chem. similarities.In this study, a novel zirconium-based adsorbent with superior adsorption performance and selectivity was synthesized using the Sol-Gel method, with a sp. surface area of up to 265.3 m²/g.The maximum adsorption capacities of V(V) and Cr(VI) were 222 and 123 mg/g, resp.The adsorption process followed the Langmuir isothermal adsorption and the pseudo-second-order kinetic model.The adsorption mechanism was thoroughly investigated confirming that the adsorption of V(V) and Cr(VI) on amorphous hydrous ZrO₂ (AHZOs) is chemisorption.At a pH of 3, the values of ΔG⁰ (-46.8 kJ/mol) and E_ads (-5.67 eV) for the main existing form H₃V₁₀O^3-₂₈ on AHZOs are lower than those for the main existing form HCrO^-₄.V(V) replaced the adsorbed Cr(VI) during competitive adsorption to achieve selective adsorption of V(V) with a separation coefficient as high as 3142.The adsorption capacity of V(V) remains above 105 mg/g after five cycles.After adsorption, the purity of Cr(VI) can be increased to above 99.5 %, and a solution of V(V) with a purity higher than 99.25 % can be obtained after desorption.The use of 3 g/L and 100 g/L adsorbent can decrease the single V(V) and Cr(VI) to 1.618 mg/L and 0.36 mg/L, resp., and meet the emission standards

The identification of natural active compounds is typically a cumbersome and time-intensive process due to the necessity for elaborate sample pretreatment, leading to inefficiencies. Although recent advancements have introduced methods for targeted screening of these active compounds, they still demand intricate sample handling, and in severe cases, critical active compounds may be lost or degraded beyond detection. This study capitalizes on the novel discovery that Fe₃O₄ magnetic nanoparticles (MNPs) can be stably immobilized onto a magnetized steel probe of the electrostatic field induced spray ionization mass spectrometry (EFISI-MS) platform. By employing a method that targets the isolation of active compounds using MNPs paired with biomaterials (such as enzymes and cell membranes), we fixed complexes of cell membranes bound to Fe₃O₄ MNPs onto the magnetized probe through magnetic adsorption. This modified probe enables direct sampling from fresh plants, followed by EFISI-MS analysis. Employing this method, we successfully identified three gastroprotective compounds (schaftoside, isoschaftoside and 4-allyl-2,6-dimethoxyphenyl glucoside) directly from fresh Dendrobium huoshanense in situ, eliminating the need for preliminary sample treatment. The structures of these compounds were confirmed through total synthesis and comparative analysis with standards. Further biological experiments demonstrated that these compounds not only enhanced the survival rate of MNNG induced GES-1 cells in vitro in a dose-dependent manner but also significantly ameliorated gastric mucosal injury in a mouse model. Furthermore, the conventional approach using Fe₃O₄ MNPs combined with cell membranes to extract components from D. huoshanense failed to detect active compound 4-allyl-2,6-dimethoxyphenyl glucoside. This demonstrates that our newly developed methodology not only facilitates the direct in situ identification of plant derived active compounds but also significantly improves the detection rate of these bioactive substances.