Adsorption of metal-etylenediaminetetraacetic acid chelates onto lake sediment

Mika Sillanpää (Corresponding Author), Jaakko Rämö

Research output: Contribution to journalArticleScientificpeer-review

29 Citations (Scopus)

Abstract

The adsorption of Ethylenediaminetetraacetic acid (EDTA) and its metal complexes, Cu, Fe(III), Hg, Mn and Ni, onto lake sediment was studied. The results reveal that EDTA and metal–EDTA complexes, even though being hydrophilic compounds, are indeed adsorbed within one months' contact time to some extent (6.3–24.8%). Less than 10% of Ni–EDTA, Cu–EDTA and EDTA salt was adsorbed, while the mass amount of Mn–EDTA, Hg–EDTA and Fe(III)–EDTA found in sediment exceeded 15% after the contact period. Thus, adsorption of metal–EDTA chelates might be a relevant process in their removal from the aquatic environment. The metal–EDTA chelates in aqueous and solid phases were determined by gas chromatography–nitrogen phosphorus detection (GC–NPD) system. The complexes were extracted by phosphate solution prior to analysis. The ability of EDTA to desorb adsorbed heavy metals from sediments is also discussed.
Original languageEnglish
Pages (from-to)881-885
Number of pages5
JournalChemosphere
Volume45
Issue number6-7
DOIs
Publication statusPublished - 2001
MoE publication typeA1 Journal article-refereed

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chelate
Ethylenediaminetetraacetic acid
Lakes
EDTA
Edetic Acid
Adsorption
lacustrine deposit
Sediments
Metals
adsorption
Acids
acid
metal
Coordination Complexes
Metal complexes
Heavy Metals
aquatic environment
Phosphorus
sediment
Heavy metals

Cite this

Sillanpää, Mika ; Rämö, Jaakko. / Adsorption of metal-etylenediaminetetraacetic acid chelates onto lake sediment. In: Chemosphere. 2001 ; Vol. 45, No. 6-7. pp. 881-885.
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title = "Adsorption of metal-etylenediaminetetraacetic acid chelates onto lake sediment",
abstract = "The adsorption of Ethylenediaminetetraacetic acid (EDTA) and its metal complexes, Cu, Fe(III), Hg, Mn and Ni, onto lake sediment was studied. The results reveal that EDTA and metal–EDTA complexes, even though being hydrophilic compounds, are indeed adsorbed within one months' contact time to some extent (6.3–24.8{\%}). Less than 10{\%} of Ni–EDTA, Cu–EDTA and EDTA salt was adsorbed, while the mass amount of Mn–EDTA, Hg–EDTA and Fe(III)–EDTA found in sediment exceeded 15{\%} after the contact period. Thus, adsorption of metal–EDTA chelates might be a relevant process in their removal from the aquatic environment. The metal–EDTA chelates in aqueous and solid phases were determined by gas chromatography–nitrogen phosphorus detection (GC–NPD) system. The complexes were extracted by phosphate solution prior to analysis. The ability of EDTA to desorb adsorbed heavy metals from sediments is also discussed.",
author = "Mika Sillanp{\"a}{\"a} and Jaakko R{\"a}m{\"o}",
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journal = "Chemosphere",
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Adsorption of metal-etylenediaminetetraacetic acid chelates onto lake sediment. / Sillanpää, Mika (Corresponding Author); Rämö, Jaakko.

In: Chemosphere, Vol. 45, No. 6-7, 2001, p. 881-885.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Adsorption of metal-etylenediaminetetraacetic acid chelates onto lake sediment

AU - Sillanpää, Mika

AU - Rämö, Jaakko

PY - 2001

Y1 - 2001

N2 - The adsorption of Ethylenediaminetetraacetic acid (EDTA) and its metal complexes, Cu, Fe(III), Hg, Mn and Ni, onto lake sediment was studied. The results reveal that EDTA and metal–EDTA complexes, even though being hydrophilic compounds, are indeed adsorbed within one months' contact time to some extent (6.3–24.8%). Less than 10% of Ni–EDTA, Cu–EDTA and EDTA salt was adsorbed, while the mass amount of Mn–EDTA, Hg–EDTA and Fe(III)–EDTA found in sediment exceeded 15% after the contact period. Thus, adsorption of metal–EDTA chelates might be a relevant process in their removal from the aquatic environment. The metal–EDTA chelates in aqueous and solid phases were determined by gas chromatography–nitrogen phosphorus detection (GC–NPD) system. The complexes were extracted by phosphate solution prior to analysis. The ability of EDTA to desorb adsorbed heavy metals from sediments is also discussed.

AB - The adsorption of Ethylenediaminetetraacetic acid (EDTA) and its metal complexes, Cu, Fe(III), Hg, Mn and Ni, onto lake sediment was studied. The results reveal that EDTA and metal–EDTA complexes, even though being hydrophilic compounds, are indeed adsorbed within one months' contact time to some extent (6.3–24.8%). Less than 10% of Ni–EDTA, Cu–EDTA and EDTA salt was adsorbed, while the mass amount of Mn–EDTA, Hg–EDTA and Fe(III)–EDTA found in sediment exceeded 15% after the contact period. Thus, adsorption of metal–EDTA chelates might be a relevant process in their removal from the aquatic environment. The metal–EDTA chelates in aqueous and solid phases were determined by gas chromatography–nitrogen phosphorus detection (GC–NPD) system. The complexes were extracted by phosphate solution prior to analysis. The ability of EDTA to desorb adsorbed heavy metals from sediments is also discussed.

U2 - 10.1016/S0045-6535(01)00025-X

DO - 10.1016/S0045-6535(01)00025-X

M3 - Article

VL - 45

SP - 881

EP - 885

JO - Chemosphere

JF - Chemosphere

SN - 0045-6535

IS - 6-7

ER -