Oceanic trace metal scavenging: the importance of particle concentration

Honeyman, Bruce D.; Balistrieri, Laurie S.; Murray, James

doi:10.1016/0198-0149(88)90038-6

Cited by 228 publications

(119 citation statements)

References 48 publications

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“…In continental margin water of the Middle Atlantic Bight, the value was -0.62 (Santschi et al, 1999). However, the intercept in this study was in the magnitude of 10 1 -10 2 lower than those determined by Honeyman et al (1988) and Santschi et al (1999), suggesting that 234 Th affinity for TSM is apparently lower than that in the other areas due to dilution effect of algal blooming.…”

Section: Distributions Ofcontrasting

confidence: 51%

“…7 in order to investigate 234 Th reactivity for TSM. Relationships between values determined in this study and compiled by Honeyman et al (1988) have good correlations with gradients of -0.48 and of -0.42, respectively. This demonstrates that adsorption efficiency for TSM is nearly the same; nevertheless, the observed area is quite different.…”

Section: Distributions Ofmentioning

confidence: 72%

“…6(a) and (b). 210 Po activity in plankton has a negative relation to chlorophyll a; however, the activity has no relation to TSM, indicating that 210 Po has a stronger affinity This study Honeyman et al (1988) Log Kd (ml/g) for Honeyman et al (1988) 234 Th (dpm/100 L) and 210 Po (dpm/100 L), and C p is the TSM concentration (mg/L).…”

Section: Distributions Ofmentioning

confidence: 99%

“…The marine geochemistry of 234 Th (t 1/2 = 24.1 d) and 210 Po (t 1/2 = 138.4 d) of the naturally occurring 238 U decay-series has received considerable attention because it can reveal valuable information regarding the fate and scavenging processes of trace elements between the dissolved and particulate phases in the ocean (Turekian et al, 1974;Bacon et al, 1976Bacon et al, , 1980Bacon, 1988;Santschi et al, 1979Santschi et al, , 1999Tanaka et al, 1983;McKee et al, 1984McKee et al, , 1991Honeyman et al, 1988;Wei and Murray, 1991, 1992, 1994. 234 Th and 210 Po are well known for being particle-reactive chemical property, although they may not follow the same geochemical pathway.…”

Section: Introductionmentioning

confidence: 99%

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Scavenging of 234Th and 210Po in surface water of Jinhae Bay, Korea during a red tide

Kim

Yang

2004

Geochem. J.

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This observation was carried out on the surface seawater of Jinhae Bay, southeastern Korea during a red tide in July, 1991 in order to understand the removal processes of reactive trace elements using natural radionuclides of 234 Since the 1970s, Jinhae Bay has been investigated by many researchers and the NFRDI (National Fisheries Research and Development Institute) for chemical and physical characteristics in seawater and sediment and for the occurrence and magnitude of algal blooming throughout the year, except for winter (Park, 1975a, b;Lee et al., 1981;Yang and Hong, 1982;Yang et al., 1984;Yang and Hong, 1988;Hong et al., 1991;Lee et al., 1993). Lee et al. (1993) reported that the formation of a sub-oxic or an anoxic environment in the bottom waters of Jinhae Bay resulted in a remarkable exhaustion of dissolved oxygen by the degradation of organic matter accumulated on surface sediments, as well as by the stratification of the water mass. Spatial and temporal variations of low oxic water mass strongly depend on the stratification, which is affected by meteorological and maritime conditions. Although many studies have been conducted in Jinhae Bay, the residence time and the fate of reactive trace metals in seawater have not yet been studied. Under a red tide environment, there have been few investigations of the scavenging processes of reactive trace metals with tracers of short-lived 234 Th and 210 Po in the coastal surface area. The objectives of this study, therefore, are to understand the removal processes of reactive trace elements using co-tracers of 234 Th and 210 Po during algal blooming, and to estimate the residence time of 234 Th in the surface seawater of Jinhae Bay.

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Section: Distributions Ofcontrasting

confidence: 51%

Section: Distributions Ofmentioning

confidence: 72%

Section: Distributions Ofmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Scavenging of 234Th and 210Po in surface water of Jinhae Bay, Korea during a red tide

Kim

Yang

2004

Geochem. J.

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“…De nombreux travaux (laboratoire, terrain, modèles) montrent l'importance de ces phases colloïdales ou particulaires sur la distribution des éléments en trace dans les eaux marines [1,2,7,11,13,15,19,25,27,30,34] pour les raisons suivantes :…”

Section: Extension Des Recherchesunclassified

Importance des phases colloïdales et particulaires présentes dans les environnements marins

Moulin¹

1995

Radioprotection

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RÉSUMÉABSTRACT This paper constitutes a bibliographic review on the colloidal and particulate phases occurring in marine waters (nature, weighable importance, characteristics and associated analytical techniques) and their impact on radionuclide (or analogue) distribution in the marine environment. The first part points out the different techniques used to characterise the colloidal and particulate phases (in particular, transmission electron microscopy) in marine systems. From this study, other research areas are underlined. The second part shows the importance of the colloidal and particulate phases (even if their weighable importance is low) on the distribution of trace elements in marine systems. In particular, the studies underline, besides the importance of sorption phenomena at colloid/particle interfaces, the major role of phenomena such as the particle/particle (or colloid/colloid) interactions leading to coagulation/sedimentation processes. The understanding of the whole phenomena relies on complementary experimental approaches such as study of model and natural systems (marine or coastal waters). 233Article published by EDP Sciences and available at http://www.radioprotection.org or http://dx

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A revised global estimate of dissolved iron fluxes from marine sediments

Dale

Nickelsen

Scholz

et al. 2015

Global Biogeochemical Cycles

151

228

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Literature data on benthic dissolved iron (DFe) fluxes (μmol m À2 d À1 ), bottom water oxygen concentrations (O 2BW , μM), and sedimentary carbon oxidation rates (C OX , mmol m À2 d À1 ) from water depths ranging from 80 to 3700 m were assembled. The data were analyzed with a diagenetic iron model to derive an empirical function for predicting benthic DFe fluxes: DFe flux ¼ γ Á tanh COX O2BW where γ (= 170 μmol m À2 d À1 ) is the maximum flux for sediments at steady state located away from river mouths. This simple function unifies previous observations that C OX and O 2BW are important controls on DFe fluxes. Upscaling predicts a global DFe flux from continental margin sediments of 109 ± 55 Gmol yr À1 , of which 72 Gmol yr À1 is contributed by the shelf (<200 m) and 37 Gmol yr À1 by slope sediments (200-2000 m). The predicted deep-sea flux (>2000 m) of 41 ± 21 Gmol yr À1 is unsupported by empirical data. Previous estimates of benthic DFe fluxes derived using global iron models are far lower (approximately 10-30 Gmol yr À1 ). This can be attributed to (i) inadequate treatment of the role of oxygen on benthic DFe fluxes and (ii) improper consideration of continental shelf processes due to coarse spatial resolution. Globally averaged DFe concentrations in surface waters simulated with the intermediate-complexity University of Victoria Earth System Climate Model were a factor of 2 higher with the new function. We conclude that (i) the DFe flux from marginal sediments has been underestimated in the marine iron cycle and (ii) iron scavenging in the water column is more intense than currently presumed.

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Oceanic trace metal scavenging: the importance of particle concentration

Cited by 228 publications

References 48 publications

Scavenging of 234Th and 210Po in surface water of Jinhae Bay, Korea during a red tide

Scavenging of 234Th and 210Po in surface water of Jinhae Bay, Korea during a red tide

Importance des phases colloïdales et particulaires présentes dans les environnements marins

A revised global estimate of dissolved iron fluxes from marine sediments

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