Synthesis And Application Of Schiff Base Chelating Resins Of Dialdehyde Starch

Heavy metal ions are things that can cause the body function damage after they enter human body with the food chain.It is attracted more and more attention by all countries' scientists.So people begin to seek for a nature,cheap and good adsorption materials to remove the various heavy metal ion,the natural biological polymer materials become the scientists' first choice.This thesis mainly using potato starch as raw adsorbent material,becoming insolubility starch schiff base of chelating resin,deeply in search of the products.Except for Zn ion,we also discuss the other ions as our absorbents.This thesis mainly discussed:1,Explore and synthesis three different oxidation degree of dialdehyde starch(DAS1?DAS2?DAS3).And then take dialdehyde starch as starch based,after trying to a variety of ligands,we finally confirmed 8-aminoquinoline as aim ligand.The new synthesis of starch based schiff chelating resin—dialdehyde starch 8-amino quinoline(DASQA).In the characterization of analysis,infrared,elemental analysis,Thermogravimetric Analysis,XRD,electron microscope and a series of test method.2,Explore influence factors of the DASQAs.The result shows that when the pH about 5,the adsorption quantity reached to maximize and remain the same,after 2 hours,reaches to adsorption balance,the applied force between resin and ions was chelating force.The adsorption balance meet Langmuir adsorption isothermal model.During the adsorption process,adsorption thermodynamics research shows that is the heat absorption,heating up can improve the adsorption ability of DASQA.3,DASQA3 adsorpt the Various kinds of ions,the Pb(II),Cu(?),Cd(?),Ni(?)and Zn(?)etc.The research shows that the adsorption ability in turn are Cd(?),Zn(?),Pb(?),Ni(?)and Cu(?),and moreover,the best pH is 5,the adsorption balance time is two hours or so.