Lanthanide metal–organic frameworks as selective microporous materials for adsorption of heavy metal ions. Issue 22 (12th May 2016)

• Record Type: Journal Article
• Authors: Jamali, Abbas; Tehrani, Alireza Azhdari; Shemirani, Farzaneh; Morsali, Ali
• Is Part Of: Dalton transactions. Volume 45:Issue 22(2016)
• Page Start: 9193
• Page End: 9200
• Publication Date: 2016-05-12
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c6dt00782a
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Four microporous lanthanide metal–organic frameworks (MOFs), namely Ln(BTC)(H2 O)(DMF)1.1 (Ln = Tb, Dy, Er and Yb, DMF = dimethylformamide, H3 BTC = benzene-1, 3, 5-tricarboxylic acid), have been used for selective adsorption of Pb(ii ) and Cu(ii ). Abstract : Four microporous lanthanide metal–organic frameworks (MOFs), namely Ln(BTC)(H2 O)(DMF)1.1 (Ln = Tb, Dy, Er and Yb, DMF = dimethylformamide, H3 BTC = benzene-1, 3, 5-tricarboxylic acid), have been used for selective adsorption of Pb(ii ) and Cu(ii ). Among these MOFs, the Dy-based MOF shows better adsorption property and selectivity toward Pb(ii ) and Cu(ii ) ions. Adsorption isotherms indicate that sorption of Pb(ii ) and Cu(ii ) on MOFs is via monolayer coverage. Preconcentration is based on solid-phase extraction in which MOFs were rapidly injected into water samples and adsorption of metal ions was rapid because of good contact with analyte; then adsorbed Pb(ii ) and Cu(ii ) ions were analyzed by FAAS. The optimized methodology represents good linearity between 1 and 120 μg L −1 and detection limit of 0.4 and 0.26 μg L −1 for Pb(ii ) and Cu(ii ), respectively. Subsequently the method was evaluated for preconcentration of target metal ions in some environmental water samples.