H2xMnxSn3-xS6 (x = 0.11-0.25)

A novel reusable sorbent for highly specific mercury capture under extreme pH conditions

Manolis J. Manos, Valeri G. Petkov, Mercouri G Kanatzidis

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

The H2xMnxSn3-xS6 (x 0.11-0.25) is a new solid acid with a layered hydrogen metal sulfide (LHMS). It derives from K2xMnxSn3-xS6 (x 0.5.....0.95) (KMS-1) upon treating it with highly acidic: solutions. We demonstrate that LHMS-1 has enormous affinity for the very soft metal ions such as Hg 2+ and Ag+ which occurs via a rapid ion exchange process. The tremendous affinity of LHMS-1 for Hg2+ is reflected in very high distribution coefficient KdHg values(>106 mL g-1). The large affinity and selectivity of LHMS-1 for Hg 2+ persists in a very wide pH range (from less than zero to nine} and even in the presence of highly concentrated HCI and HNO3 acids. LHMS-1 is significantly more selective for Hg2+ and Ag+ than for the less soft cations Pb2+ and Cd2+. The Hg 2+ ions are immobilized in octahedral sites between the sulfide layers of the materials via Hg-S bonds as suggested by pair distribution function (PDF) analysis. LHMS-1 could decrease trace concentrations of Hg 2+ (e.g.

Original languageEnglish
Pages (from-to)1087-1092
Number of pages6
JournalAdvanced Functional Materials
Volume19
Issue number7
DOIs
Publication statusPublished - Apr 9 2009

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sorbents
Sulfides
Sorbents
Mercury
sulfides
Hydrogen
Metals
hydrogen
metals
affinity
acids
Acids
Human computer interaction
Distribution functions
Metal ions
Cations
metal ions
Ion exchange
ions
selectivity

ASJC Scopus subject areas

  • Biomaterials
  • Electrochemistry
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

H2xMnxSn3-xS6 (x = 0.11-0.25) : A novel reusable sorbent for highly specific mercury capture under extreme pH conditions. / Manos, Manolis J.; Petkov, Valeri G.; Kanatzidis, Mercouri G.

In: Advanced Functional Materials, Vol. 19, No. 7, 09.04.2009, p. 1087-1092.

Research output: Contribution to journalArticle

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