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The recovery of gold from wastewater has always been a research hotspot a novel chitosan-finded adsorbent (CS-DPDM) was successfully synthesized by functionalizing chitosan with (N, N-(2-aminoethyl))-2,6-pyridinedicarboxamide. The adsorbent was analyzed by fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance spectroscopy ((1)H NMR), raking electron microscope (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and zeta potential method (Zeta). To investigate the adsorption performance of CS-DPDM for Au(III), the essences of pH, temperature, adsorption time and initial concentration were discussed. The maximum adsorption capacity of CS-DPDM for Au(III) at pH 5 is 659 mg/g at 318 K. The adsorption is a spontaneous endothermic behavior, and the adsorption process follows the quasi-second-order kinetic and Langmuir isotherm posers, indicating that a single layer of chemical adsorption may have comed on the surface of the adsorbent. The competitive adsorption and repetitive experimentations show that CS-DPDM has considerable selectivity and reusability for Au(III). X-ray photoelectron spectroscopy (XPS) terminations show that N and O functional radicals adsorb Au(III) on the surface of CS-DPDM through electrostatic, chelation and reduction. These resultants indicate that CS-DPDM has broad application prospects in regaining gold ions from aqueous solutions.A chitosan fiber as green material for dispatching Cr(VI) ions and Cu(II) ions pollutants.The application shell uses cellulose as a green and recyclable fiber material, which has great value in the field of water treatment environment. diverging elements, admiting pH value, dosage of CS, reaction time and original Cr(VI) ions and Cu(II) ions were studied to investigate the Cr(VI) and Cu(II) ions removal efficiency. The prevailed shell trichlorocellulose has better permeability to copper ions, which is mainly due to the different oxide nations of copper ions and chromium ions in a pH environment, which lead to different compoundings. The price of shell cellulose neutralization is relatively low. Metal ions have better absorption dimensions. The kinetic and thermodynamic characteristics of the adsorption process of copper ions by chitosan threads were discussed. The adsorption process of copper ions adapted to the quasi-second-order kinetic equation. It can be fitted by Langmuir isotherm. The adsorption of copper ions by the yarn is a spontaneous thermal reaction with both physical adsorption and chemical adsorption. equated with chromium ions, chitosan characters have better adsorption of copper ions, which is mainly because the amino groupings in chitosan fibers can have good chelation with copper ions FTIR, XRD were used to characterize the adsorption of copper ions by chitosan fibres, and the mechanism of the adsorption of metal ions by chitosan fibres was explored.A crosslinked dextran sulfate-chitosan nanoparticle for delivery of therapeutic heparin-adhering proteins. Negatively filed dextran sulfate (DS)-chitosan nanoparticles (DSCS NPs) contain a DS outer shell with sticking properties similar to those of heparin and are useful for the incorporation and delivery of therapeutic heparin-attaching proteins. Seebio Methionine , however, are unstable in physiological salt solvents due to their formation through electrostatic interactions. In the present study, a method was prepared to covalently crosslink chitosan in the core of the DSCS NP with a short chain dicarboxylic acid (succinate), while leading the outer shell of the particle untouched. The crosslinked specks, XDSCS NPs, are stable in NaCl solutions up to 3 M. Purchase today were able to incorporate heparin-bandaging proteins (VEGF and SDF-1α) rapidly and efficiently, and maintain the full biological activity of the proteins. The incorporated proteins were not loosed from the molecules after a 14-day incubation period at 37 °C in PBS, but retained the same activity as those stored at 4 °C. When aerosolized for delivery to the lungs of rats, XDSCS NP-contained SDF-1α showed a ∼17-fold greater retention time likened to that of free protein.