Potential capacity of coprecipitation of dissolved organic carbon (DOC) with iron(III) precipitates

Satoh, Yasuhiro; Kikuchi, Keiko; Kinoshita, Shingo; Sasaki, Hidetada

doi:10.1007/s10201-006-0184-y

Cited by 20 publications

(26 citation statements)

References 23 publications

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“…At pH > 4 the iron surface is covered by insoluble oxide layers [18,22]. Whether the contaminant is reduced or not, it might be removed from the aqueous phase by adsorption and/or co-precipitation [15, [25][26][27]. Therefore, "contaminant removal" and "contaminant reduction" should never be interchanged randomly.…”

Section: Quantification Of Reactive Species In a Fe 0 /H 2 O Systemmentioning

confidence: 99%

An analysis of the evolution of reactive species in Fe0/H2O systems

Noubactep¹

2009

Journal of Hazardous Materials

135

102

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Section: Quantification Of Reactive Species In a Fe 0 /H 2 O Systemmentioning

confidence: 99%

An analysis of the evolution of reactive species in Fe0/H2O systems

Noubactep¹

2009

Journal of Hazardous Materials

135

102

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“…The trophic status of this lake is on the boundary between meso-and eutrophic (Satoh et al 1996). The anoxic hypolimnion is formed from late July or early August to late October or early November (Satoh et al 1996(Satoh et al , 2001(Satoh et al , 2002(Satoh et al , 2006.…”

Section: Methodsmentioning

confidence: 99%

“…The sampling station was the same as that used in Satoh et al (1996Satoh et al ( , 2001Satoh et al ( , 2002Satoh et al ( , 2006. Water samples from 40 cm above the lake bottom were collected nine times from April to November 2007 using a hand-made vinyl tube sampler (Satoh et al 2006).…”

Section: Methodsmentioning

confidence: 99%

“…Changes in the concentrations of some constituents with time were recorded, and it was concluded that (1) it is quite possible that naturally occurring iron (II) in the hypolimnetic anoxic waters coprecipitates naturally occurring dissolved organic carbon (DOC) when iron (II) is oxidized to iron (III), (2) up to about 50% of the DOC is potentially coprecipitable, and (3) only part of the potentially coprecipitable DOC may coprecipitate in situ. As Satoh et al (2006) pointed out, the coprecipitation of DOC with Fe(III) precipitates makes a part of the DOC unavailable to the microbial loop in the water column. At the same time, the coprecipitated DOC becomes available to the microbial loop at the lake bottom.…”

Section: Introductionmentioning

confidence: 97%

“…However, these studies deal with the reactions between natural or artificial dissolved organic matter and artificial Fe(III) precipitates. Satoh et al (2006) were the first to demonstrate the potential capacity of the coprecipitation of naturally occurring dissolved organic matter upon oxidation of naturally occurring Fe(II) in an anaerobic hypolimnion of a lake. They collected anaerobic hypolimnetic water from Lake Onogawa using an airtight hand-made tube sampler.…”

Section: Introductionmentioning

confidence: 99%

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Reverse process of coprecipitation of dissolved organic carbon with Fe(III) precipitates in a lake

et al. 2009

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Enhanced carbon loss from anoxic lake sediment through diffusion of dissolved organic carbon

2016

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Lakes are highly relevant players in the global carbon cycle as they can store large amounts of organic carbon (OC) in sediments, thereby removing OC from the actively cycling pool. However, sediment OC can be released to pore water under anoxic conditions and diffuse into the water column. In carbon budgets of lake ecosystems, this potential OC loss pathway from sediments is generally disregarded. Combining field observations and incubation experiments, we quantitatively investigated dissolved OC (DOC) diffusion from sediments into anoxic water of a boreal lake. We observed substantial increases of bottom water DOC (26% in situ, 16% incubation), translating into a DOC flux from the sediment that was comparable to anoxic sediment respiration (3.3 versus 5.1 mmol m−2 d−1). Optical characterization indicated that colored and aromatic DOC was preferentially released. Reactivity assays showed that DOC released from anoxic sediment enhanced water column respiration and flocculation in reoxygenated water. Upon water oxygenation, flocculation was the most important loss pathway removing ~77% of released DOC, but the remaining ~23% was mineralized, constituting a pathway of permanent loss of sediment OC. DOC diffusion from lake sediment during anoxia and subsequent mineralization in oxic water during mixing increases overall OC loss from anoxic sediments by ~15%. This study enlarges our understanding of lake ecosystems by showing that under anoxic conditions significant amounts of DOC can be released from OC stored in sediments and enter the active aquatic carbon cycle again.

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Potential capacity of coprecipitation of dissolved organic carbon (DOC) with iron(III) precipitates

Cited by 20 publications

References 23 publications

An analysis of the evolution of reactive species in Fe0/H2O systems

An analysis of the evolution of reactive species in Fe0/H2O systems

Reverse process of coprecipitation of dissolved organic carbon with Fe(III) precipitates in a lake

Enhanced carbon loss from anoxic lake sediment through diffusion of dissolved organic carbon

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