Seasonal distribution of dissolved iron in the surface water of Sanggou Bay, a typical aquaculture area in China

Zhu, Xunchi; Zhang, Ruifeng; Liu, Sumei; Wu, Ying; Jiang, Zengjie; Zhang, Jing

doi:10.1016/j.marchem.2016.12.004

Cited by 23 publications

(19 citation statements)

References 62 publications

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“…There are many techniques for separation and detection of TMs, including gas chromatography (Wang and Cui, 2016), capillary zone electrophoresis (Kubáň and Timerbaev, 2014), supercritical fluid chromatography (Henry and Yonker, 2006), atomic absorption spectrometry (Ribeiro et al, 2017), inductively coupled plasma mass spectrometry (Zhu et al, 2017), and atomic emission spectrometry (Vidal et al, 2016). Among the analytical techniques, electroanalytical techniques are the most universal analytical tool due to the simultaneous quantitative and qualitative determinations of TMs in various matrices with high levels of convenience and rapid and straightforward analytical processes.…”

Section: Introductionmentioning

confidence: 99%

Species, Spatial-Temporal Distribution, and Contamination Assessment of Trace Metals in Typical Mariculture Area of North China

et al. 2020

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The species, spatial-temporal distribution, sources, correlations with physiochemical factors, and the contamination of trace metals (Cu, Pb, Cd, and Zn) were investigated in a typical mariculture area of North China. The concentrations of three species of trace metals, including total dissolved, dissolved reactive, and dissolved inert, were obtained. The total dissolved concentrations of Cu, Pb, Cd, and Zn ranged within 1.75-8.08, 0.43-2.75, 0.07-0.29, and 2.58-30.28 µg/L, respectively. These ranges were measured over 5 months (March, May, July, September, and November) and their concentrations decreased in the following order: Zn > Cu > Pb > Cd. The concentrations of Cu, Pb, Cd, and Zn decreased from nearshore to offshore, showing a distinctly regional variation. All concentrations of trace metals over the whole mariculture area were lower than the grade-II seawater quality standard of China. The relationships between trace metals with micronutrient metal (Fe) and other environmental factors (i.e., temperature, chlorophyll a, salinity, dissolved oxygen, and conductivity) were studied in detail. Discharged industrial and aquaculture effluents, uptake by organisms, and atmospheric deposition were found to be possible sources of trace metals in the studied area. Sea current and physicochemical parameters were factors that possibly influenced the spatial-temporal distribution of trace metals.

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Section: Introductionmentioning

confidence: 99%

Species, Spatial-Temporal Distribution, and Contamination Assessment of Trace Metals in Typical Mariculture Area of North China

et al. 2020

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“…Fe is the fourth most abundant element in the Earth’s crust, after oxygen, silicon and aluminum 3 , with an abundance of 5~6% 4 , 5 . The Fe concentration in water is proportionally less due to its low solubility 6 , with reports of Fe concentrations in natural water sources ranging from 10 −6 M in river water, 10 −6 –10 −9 M in coastal water and 10 −11 M in ocean water 7 . Total Fe pools include species such as Fe(II) (ferrous) and Fe(III) (ferric) Fe, organically and inorganically complexed Fe, colloidal Fe and particulate Fe 8 .…”

Section: Introductionmentioning

confidence: 99%

Speciation determination of iron and its spatial and seasonal distribution in coastal river

Zhu

Pan

et al. 2018

Sci Rep

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In this study, the speciation of iron (Fe), including total Fe (TFe) and acidified dissolved Fe (ADFe), was assessed by fast cathodic absorption stripping voltammetry, using a gold electrode and 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP) as a novel complexing agent for Fe. The validity and accuracy of this method were compared with the standard spectrophotometry and tested by the standard samples. Under optimized conditions, the Fe response was linear within the range of 0.01 to 1 μM with a detection limit of 1.2 nM. To further validate this method, the variation in concentrations of TFe and ADFe were investigated at twelve sampling stations in a local coastal river, in both the dry and wet season. Additionally, to further understand the interaction between Fe and environmental factors, the relationships between the concentration of Fe species and dissolved oxygen (DO) and salinity were also discussed.

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“…Our analytical results versus the consensus values of the reference samples were 0.94 ± 0.07 nM versus 0.95 ± 0.02 nM for SAFe D2, and 10.4 ± 0.20 nM versus 10.2 ± 1.20 nM for SLEW‐3 (NRC, Canada) (Zhang et al, ). More details on dFe analysis can be found in Zhang et al () and Zhu et al (). Samples analyzed to show high dFe concentrations were diluted to dFe levels close to the seawater end‐member and reanalyzed.…”

Section: Methodsmentioning

confidence: 99%

The Remobilization and Removal of Fe in Estuary—A Case Study in the Changjiang Estuary, China

Zhu

Zhang²,

et al. 2018

JGR Oceans

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Dissolved iron (dFe) delivered by rivers plays a vital role in supporting primary productivity in coastal ecosystems. River‐borne Fe is generally removed in estuaries due to the salt‐induced flocculation. However, effects of the river mouth bar area on the variations of dFe concentration are frequently overlooked. Here we show the results of quasi‐synchronous observation conducted in three water channels in the mouth bar area of the Changjiang Estuary during both spring and neap tides in July 2014. dFe showed high spatial variation, from 2.63 to 690 nM, with higher values commonly found in the inner study area. An episode of significant Fe remobilization was observed in the inner mouth bar before the removal in the subsequent fresh‐saline water mixing process. Averaged dFe concentration increased from 45.2 ± 22.9 nM at Xuliujing to 188 ± 185 nM in the inner salinity (S) ≤ 1 water, then decreased to 10.3 ± 9.53 nM in the outer S > 1 water. Budget calculations revealed that the Changjiang input was the largest terrestrial source for dFe, while desorption from particles was the main reason for dFe enhancement in the study area. The entire mouth bar area was identified as a net sink for dFe, whereas, its S ≤ 1 and S > 1 zones were a source and a sink, respectively. We suggest that the mouth bar area diversifies the biogeochemical behavior of Fe in the estuary and enhances Fe output flux. Our study offers a new insight for better understanding the behavior of Fe and other particle‐reactive elements in large dynamic estuaries.

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Seasonal distribution of dissolved iron in the surface water of Sanggou Bay, a typical aquaculture area in China

Cited by 23 publications

References 62 publications

Species, Spatial-Temporal Distribution, and Contamination Assessment of Trace Metals in Typical Mariculture Area of North China

Species, Spatial-Temporal Distribution, and Contamination Assessment of Trace Metals in Typical Mariculture Area of North China

Speciation determination of iron and its spatial and seasonal distribution in coastal river

The Remobilization and Removal of Fe in Estuary—A Case Study in the Changjiang Estuary, China

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