I. Kev taw qhia yooj yim:
Sib txawv ntawm ion pauv resins, chelating resins tsis pauv ions thaum adsorbing hlau ions hauv kev daws teeb meem, tab sis tsim cov txheej txheem nrog cov hlau ions los ntawm kev sib koom ua ke ntawm ntau pawg ntawm cov polymers. Piv txwv li, imidodiacetic acid resin tsim 1: 1 complex nrog divalent hlau ions nyob rau hauv lub weakly acidic thiab nruab nrab ntau yam. Imidodiacetic acid yog ib pab pawg neeg ua haujlwm chelate. Peb hu qhov no resin chelate resin.
II. Kev faib tawm ntawm chelate resins:
Hais txog cov qauv, chelate resins tuaj yeem muab faib ua ob pawg loj. Ib qho yog pawg chelating raws li pawg sab ntawm cov polymer, thiab lwm qhov yog pawg chelating ntawm cov saw tseem ceeb ntawm cov polymer.
1. Cov pab pawg chelating yog nyob rau sab pawg, thiab pawg chelating ua raws li pawg sab ntawm cov polymer. L yog ligand thiab Mn + yog hlau ion
2. Cov pab pawg chelating yog nyob rau ntawm cov saw tseem ceeb, thiab pawg chelating yog nyob rau ntawm cov saw tseem ceeb ntawm cov polymer.
3. Chelates muaj cov yam ntxwv hauv qab no:
(1). Chelating nyhuv: Chelates ruaj khov dua li cov sib txuas sib txuas monocoordination, piv txwv li, tri (ethylenediamine) cobalt complex Co(NH2CH2CH2NH2) 3 yog ruaj khov dua li hexammine cobalt Co(NH3)6. Qhov tshwm sim ntawm kev ruaj ntseg ntxiv vim yog qhov tsim ntawm chelation rings ntawm ntau ligands thiab hlau ions yog hu ua chelation nyhuv.
(2) Txoj cai ruaj ntseg. Kev ruaj ntseg ntawm cov hlau chelates txawv nrog hom chelate pawg, cov qauv ntawm chelates thiab hom hlau ions, thiab feem ntau muaj cov cai hauv qab no:
①. Nplhaib qauv, tsib yuan yog ruaj khov piv rau rau yuan nplhaib. Yog hais tias lub nplhaib chelate muaj ob daim ntawv cog lus, qee zaum lub nplhaib rau-tus tswv cuab yog qhov ruaj khov dua.
Kev ruaj ntseg ntawm cov complex tsim los ntawm tib lub ligand nrog cov hlau sib txawv ions nce nrog qhov nce ntawm cov nqi zoo thiab txo qis ntawm ionic radius.
