On the association of iron and manganese with organic matter in anoxic marine pore waters

M. D. Krom; E. R. Sholkovitz

doi:10.1016/0016-7037(78)90005-4

On the association of iron and manganese with organic matter in anoxic marine pore waters

M. D. Krom, E. R. Sholkovitz

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Abstract

Experiments were performed to establish directly the extent of association of Fe and Mn with dissolved organic matter in anoxic pore waters from the sediments of Loch Duich, Scotland. Of the dissolved Fe, 74-84% was retained by an ultrafiltration membrane (MW ≥ 1000), in the high molecular weight (HMW) phase, compared with 3-17% of the dissolved Mn. After u.v. oxidation the measured total concentration of Fe increased by 43-70% while that in the HMW phase was reduced to 27-44%. Simultaneously, the concentration of dissolved Mn increased by only 1-12%. It was concluded that most if not all the Fe was organically bound while Mn was present mainly as labile inorganic complexes.

Original language	English
Pages (from-to)	607-611
Number of pages	5
Journal	Geochimica et Cosmochimica Acta
Volume	42
Issue number	6 PART A
DOIs	https://doi.org/10.1016/0016-7037(78)90005-4
State	Published - Jun 1978
Externally published	Yes

ASJC Scopus subject areas

Geochemistry and Petrology

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10.1016/0016-7037(78)90005-4

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title = "On the association of iron and manganese with organic matter in anoxic marine pore waters",

abstract = "Experiments were performed to establish directly the extent of association of Fe and Mn with dissolved organic matter in anoxic pore waters from the sediments of Loch Duich, Scotland. Of the dissolved Fe, 74-84% was retained by an ultrafiltration membrane (MW ≥ 1000), in the high molecular weight (HMW) phase, compared with 3-17% of the dissolved Mn. After u.v. oxidation the measured total concentration of Fe increased by 43-70% while that in the HMW phase was reduced to 27-44%. Simultaneously, the concentration of dissolved Mn increased by only 1-12%. It was concluded that most if not all the Fe was organically bound while Mn was present mainly as labile inorganic complexes.",

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AU - Krom, M. D.

AU - Sholkovitz, E. R.

PY - 1978/6

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N2 - Experiments were performed to establish directly the extent of association of Fe and Mn with dissolved organic matter in anoxic pore waters from the sediments of Loch Duich, Scotland. Of the dissolved Fe, 74-84% was retained by an ultrafiltration membrane (MW ≥ 1000), in the high molecular weight (HMW) phase, compared with 3-17% of the dissolved Mn. After u.v. oxidation the measured total concentration of Fe increased by 43-70% while that in the HMW phase was reduced to 27-44%. Simultaneously, the concentration of dissolved Mn increased by only 1-12%. It was concluded that most if not all the Fe was organically bound while Mn was present mainly as labile inorganic complexes.

AB - Experiments were performed to establish directly the extent of association of Fe and Mn with dissolved organic matter in anoxic pore waters from the sediments of Loch Duich, Scotland. Of the dissolved Fe, 74-84% was retained by an ultrafiltration membrane (MW ≥ 1000), in the high molecular weight (HMW) phase, compared with 3-17% of the dissolved Mn. After u.v. oxidation the measured total concentration of Fe increased by 43-70% while that in the HMW phase was reduced to 27-44%. Simultaneously, the concentration of dissolved Mn increased by only 1-12%. It was concluded that most if not all the Fe was organically bound while Mn was present mainly as labile inorganic complexes.

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JO - Geochimica et Cosmochimica Acta

JF - Geochimica et Cosmochimica Acta

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ER -

On the association of iron and manganese with organic matter in anoxic marine pore waters

Abstract

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