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2008 | 6 | 4 | 581-591
Tytuł artykułu

Nanosized centers for mercury(II) ions adsorption on a surface of modified silica

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The present work investigates the adsorptive interactions of Hg(II) ions in aqueous medium with hydroxylated silica, aminopropylsilica and silica chemically modified by β-cyclodextrin. Batch adsorption studies were carried out with various agitation times and mercury(II) concentrations. The maximum adsorption was observed within 15–30 min of agitation. The kinetics of the interactions, tested with the model of Lagergren for pseudo-first and pseudo-second order equations, showed better agreement with first order kinetics (k1 = 3.4 ± 0.2 to 5.9 ± 0.3 min−1). The adsorption data gave good fits with Langmuir isotherms. The results have shown that β-cyclodextrin-containing adsorbent has the largest adsorption specificity to Hg(II): K L = 4125 ± 205 mmol−1. “β-cyclodextrin-NO3-” inclusion complexes with ratio 1: 1 and super molecules with composition C42H70O35 ⊎ 3 Hg(NO3)2 are formed on the surface of β-cyclodextrin-containing silica. [...]
Wydawca

Czasopismo
Rocznik
Tom
6
Numer
4
Strony
581-591
Opis fizyczny
Daty
wydano
2008-12-01
online
2008-10-28
Twórcy
  • O.O.Chuiko Institute of Surface Chemistry, National Academy of Sciences of Ukraine, 03164, Kiev, Ukraine
  • O.O.Chuiko Institute of Surface Chemistry, National Academy of Sciences of Ukraine, 03164, Kiev, Ukraine, v-bel@mail.kar.net
  • O.O.Chuiko Institute of Surface Chemistry, National Academy of Sciences of Ukraine, 03164, Kiev, Ukraine
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11532-008-0068-6
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