Synthesis and adsorption properties of magnetic resin microbeads with amine and mercaptan as chelating groups

Abstract

Three magnetic chelating resins containing amino and mercapto groups were prepared by the suspended condensation polymerization of 2-chloroethoxymethyl thiirane with diamines. The magnetic resins were microbeads whose diameter was in the range of 10 to 45 m. The structure of the resins was characterized by XPS, IR, and elemental analysis. Their adsorption properties for Hg(II), Au(III), Pd(II), Pt(IV), Ag(I), Cu(II), Zn(II), and Pb(II) were investigated. The experimental results show the magnetic resins have high affinity for Hg(II) and noble metal ions. In the competitive adsorption, the resins predominantly adsorbed Hg(II) or Pd(II) in the coexistence of Cu(II), Zn(II), and Mg(II). Desorption of Pd(II) loaded on the resins was studied by using 2M hydrochloric acid solution containing 1% thiourea as desorbent. A high desorption ratio (up to 96.5%) was observed, and repeated adsorption/desorption operations showed the probability of repeated use of the magnetic resins.

Modified Mesoporous Silicate MCM‐41 for Zinc Ion Adsorption: Synthesis, Characterization and Its Adsorption Behavior

“…1,7 The polymeric adsorbents derivatized from imidazole and thiol functional groups have been used in noble metal separation. [8][9][10] Following our work on the synthesis of new modified mesoporous sorbents, 11 in this paper, we report the synthesis of amino-thiol-functionalized mesoporous silica MCM-41, its properties and sorption behavior for 18 metal ions.…”

Adsorption Properties of Thiol-Functionalized Mesoporous Silica

“…Сорбцию проводили во фталатном буфере (рН 4,01) в течение 12 ч при 22 °С с перемешиванием [4]. Полученные максимальные сорбци-онные ёмкости (СЕ) по Pt 2+ и Pd 2+ для Thio-SBA-15 сравнимы с СЕ полимерных сорбентов [5][6][7]. 12,5).…”

Resins IV: Preparation and characterization of terpolymer resins prepared from biphenol, thiourea and formaldehyde

“…[4][5][6][7][8][9][10] These terpolymers can be used as ion exchangers, 5,11 high temperature resistance material, [12][13][14][15] semiconductors, 16,17 antioxidants, 18 optical storage data, 19 moulding materials, 3,20 etc. From the literature data, it has been noted that thiol/mercapto and amine group possessing resin used as a chelating resin [21][22][23] and biphenol containing resin exhibits thermosetting, electrical insulating property 24 and in many other electronic device application. 19 In continuation to our earlier communication, [25][26][27] in this article, synthesis and characterization of terpolymer resins prepared from biphenol, thiourea, and formaldehyde are incorporated.…”