Diagenetic cycling of trace elements in the bottom sediments of the Swan River Estuary, Western Australia

Douglas, Grant; Adeney, John A.

doi:10.1016/s0883-2927(99)00070-0

Cited by 39 publications

(18 citation statements)

References 45 publications

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“…The Co/Mn data are within the range detailed above. Fewer data exist for the ratios of Co/Fe, but our derived value is approximately half the value that can be calculated from the estuarine sediment data of Douglas and Adeney (2000), of *1.2 9 10 -4 .…”

Section: Estimating the Association Of Co With Fe And Mn (Oxyhydr)oxidesmentioning

confidence: 45%

“…These processes were shown distinctly in experiments undertaken by Petersen et al (1995). As the authigenic oxides form, they regulate the flux of trace elements into the overlying water (Douglas and Adeney 2000), via coprecipitation and adsorption mechanisms. Co is released to porewaters within the zone of manganese reduction and recycled between oxic and suboxic sediments and porewaters (Heggie and Lewis 1984).…”

Section: Introductionmentioning

confidence: 99%

“…Iron and manganese oxyhydroxides formed within the oxic surface layers of sediment may play an important role in the regulation of trace element concentrations and their vertical distribution in sediments (Douglas and Adeney 2000). Oxygenic oxidation of Mn(II) is slow, allowing it to diffuse through the oxic-anoxic interface, thus enabling the formation of Mn-oxides within the oxic zone (Taillefert et al 2002) and potentially also in the overlying water.…”

Section: Introductionmentioning

confidence: 99%

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The Association of Cobalt with Iron and Manganese (Oxyhydr)oxides in Marine Sediment

et al. 2010

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Formation and dissolution of authigenic Fe and Mn (oxyhydr)oxides influence cycling of trace metals in oxic/suboxic surface sediments. We used the diffusive gradients in thin films technique (DGT) to estimate the association of cobalt with iron and manganese oxides. We compared Co, Fe and Mn maxima measured by DGT in the pore waters of fresh and aged marine sediment cores and estimated the Co/Fe and Co/Mn ratios in the metal oxides. A Mn maximum was not visible in DGT concentration profiles of freshly collected sediment cores, but after ageing the sediment, we observed a distinct Mn peak, presumably due to broadening of the depth range over which the various electron acceptors occur. Estimated Co/Mn ratios from both experiments are within the range of literature values for marine sediments, but the value from the aged experiment is at the lower end of the range. This is attributed to stimulation of sulphate reduction and precipitation of cobalt sulphides. The good correlation between Co and Fe maxima in the fresh sediments is attributed to the similarity of their reactions with sulphide rather than Co being released during authigenic Fe oxide reduction.

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Section: Estimating the Association Of Co With Fe And Mn (Oxyhydr)oxidesmentioning

confidence: 45%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Association of Cobalt with Iron and Manganese (Oxyhydr)oxides in Marine Sediment

et al. 2010

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“…Many studies showed that diagenetically formed Fe-Mn oxyhydroxides play a pivotal role in regulating concentrations of trace metal accumulation, speciation, and distribution along sediment profiles in some estuaries (Lion et al, 1982;Belzile et al, 1989;Buckley, 1989;Belzile and Tessier, 1990;Hamilton-Taylor et al, 1996). However, Douglas and Adeney (2000) found that the diagenetic processes in sediments do not substantially influence the trace metal/Fe ratios. In order to eliminate the effects of diagenetic, granulometric and mineralogical variability of the sediments on trace metal influxes, normalisation to Fe was adopted in the current study.…”

Section: Influx Of Trace Metals Over Timementioning

confidence: 90%

Over one hundred years of trace metal fluxes in the sediments of the Pearl River Estuary, South China

Zhang

et al. 2004

Environmental Pollution

154

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The rapid economic development in the Pearl River Delta (PRD) region in south China in the last three decades has had a significant impact on the local environment.Estuarine sediment is a major sink for contaminants and nutrients in the surrounding ecosystem. The accumulation of trace metals in sediments may cause serious environmental problems in the aquatic system. Thirty sediment cores were collected in the Pearl River Estuary (PRE) in 2000 for a study on trace metal pollution in this region. Heavy metal concentrations and Pb isotopic compositions in the four 210 Pb-dated sediment cores were determined to assess the fluxes in metal deposits over the last one hundred years. The concentrations of Cu, Pb and Zn in the surface sediment layers were generally elevated when compared with the sub-surface layers. There has been a significant increase in inputs of Cu, Pb and Zn in the PRE since the 1970s. The results also showed that different sampling locations in the estuary received slightly different types of inputs. Pb isotopic composition data indicated that the increased Pb in the recent sediments was of anthropogenic origin. The * Corresponding author (X.D. Li), email: cexdli@polyu.edu.hk; fax: (852) 2334 6389; tel: (852) 2766 6041 This is the Pre-Published Version.2 results of trace metal influxes showed that about 30% of total Pb and 15% of total Zn in the sediments in the 1990s were from anthropogenic sources. The combination of trace metal analysis, Pb isotopic composition and 210 Pb dating in an estuary can provide vital information on the long-term accumulation of metals in sediments.

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“…These phases are frequently intimately associated with one another (Perret et al, 2000;Taillefert et al, 2002), making it difficult to separate them by physical and chemical techniques. Decomposition of OM and reductive dissolution of Fe and Mn-oxides, which tend to be highest near the sediment water interface (SWI; Canavan et al, 2006;Douglas and Adeney, 2000), may lead to release of trace metals to the pore waters (Zhang et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

Geochemistry of trace metals in a fresh water sediment: Field results and diagenetic modeling

Canavan¹,

Cappellen²,

Zwolsman³

et al. 2007

Science of The Total Environment

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Concentrations of Fe, Mn, Cd, Co, Ni, Pb, and Zn were determined in pore water and sediment of a coastal fresh water lake (Haringvliet Lake, The Netherlands). Elevated sediment trace metal concentrations reflect anthropogenic inputs from the Rhine and Meuse Rivers. Pore water and sediment analyses, together with thermodynamic calculations, indicate a shift in trace metal speciation from oxide-bound to sulfide-bound over the upper 20 cm of the sediment. Concentrations of reducible Fe and Mn decline with increasing depth, but do not reach zero values at 20 cm depth. The reducible phases are relatively more important for the binding of Co, Ni, and Zn than for Pb and Cd. Pore waters exhibit supersaturation with respect to Zn, Pb, Co, and Cd monosulfides, while significant fractions of Ni and Co are bound to pyrite. A multi-component, diagenetic model developed for organic matter degradation was expanded to include Zn and Ni dynamics. Pore water transport of trace metals is primarily diffusive, with a lesser contribution of bioirrigation. Reactions affecting trace metal mobility near the sediment-water interface, especially sulfide oxidation and sorption to newly formed oxides, strongly influence the modeled estimates of the diffusive effluxes to the overlying water. Model results imply less efficient sediment retention of Ni than Zn. Sensitivity analyses show that increased bioturbation and sulfate availability, which are expected upon restoration of estuarine conditions in the lake, should increase the sulfide bound fractions of Zn and Ni in the sediments.

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Diagenetic cycling of trace elements in the bottom sediments of the Swan River Estuary, Western Australia

Cited by 39 publications

References 45 publications

The Association of Cobalt with Iron and Manganese (Oxyhydr)oxides in Marine Sediment

The Association of Cobalt with Iron and Manganese (Oxyhydr)oxides in Marine Sediment

Over one hundred years of trace metal fluxes in the sediments of the Pearl River Estuary, South China

Geochemistry of trace metals in a fresh water sediment: Field results and diagenetic modeling

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