Factors Affecting Metal Accumulation, Mobility and Availability in Intertidal Wetlands of the Scheldt Estuary (Belgium)

Laing, Gijs Du; Moortel, Annelies Van de; Lesage, Els; Verloo, Marc

doi:10.1007/978-1-4020-8235-1_11

Cited by 8 publications

(6 citation statements)

References 34 publications

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“…Dissolved organic ligands have the ability to form soluble complexes with trace metals (Du Laing, 2008). Ranking of measured binding strengths for DOM were Cd > Pb > Cr with average values of 10.7 ± 0.7, 9.5 ± 0.1, and 7.3 ± 0.1 (Fig.…”

Section: Complexation Analysesmentioning

confidence: 97%

Characterization of dissolved organic matter from a restored urban marsh and its role in the mobilization of trace metals

ElBishlawi

Jaffé

2015

Chemosphere

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Dissolved organic matter (DOM), although highly variable and not very well characterized, plays a role in many important environmental reaction and transport processes, including trace metal mobilization. This study characterizes heterogeneous DOM from the pore-water of a restored urban tidal marsh, using chemical, optical, and electrochemical methods for dissolved organic carbon/nitrogen ratios (C:N: 1.8-6.4), spectroscopic characteristics (decreased aromaticity in amended sediments), element ratios (maximum sediment-associated trace metal concentrations measured<30 cm), and metal complexation properties (logKc: Cd: 10.7±0.7>Pb: 9.5±0.1>Cr: 7.3±0.1>Cu: 5.07±0.53), all as a function of sediment depth. Specific DOM properties from the restored marsh were then compared to pore-water samples from a natural marsh and a simulated wetland microcosm which resulted in similar values, while the reference humic acid significantly differed in properties from field DOM. The results revealed that reference humic acids do not accurately represent the complexity of natural heterogeneous DOM, whereas a simulated wetland microcosm may provide a reasonable representation of natural DOM. Clear differences between amended and original soil (transition below 30 cm) were observed in DOM and trace metal properties including: lower DOM content, higher logKc values, less DOM complexity, development of a iron-sulfide redox buffering pool, and greater affinity for metals in the solid phase occurring in the amended sediments.

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Section: Complexation Analysesmentioning

confidence: 97%

Characterization of dissolved organic matter from a restored urban marsh and its role in the mobilization of trace metals

ElBishlawi

Jaffé

2015

Chemosphere

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“…The main natural sources of metals into the aquatic system are the weathering of soils and rocks and precipitation; or from anthropogenic activities such as industrial, domestic, and urban sewage runoffs (Rippey 1982;Caccia and Millero 2003;Du Laing et al 2008;Nduka and Orisakwe 2009;Sundaray et al 2012). Elevated concentrations of total Zn were observed at station 9.…”

Section: Dissolved Nitrogenmentioning

confidence: 99%

“…Heavy metals are deemed to be dangerous pollutants and have raised environmental concern due to their toxicity, persistence and non-degradability, bioaccumulation in organisms, and ultimately their effect on human health (Burgos and Rainbow 2001;Kress et al 2004;Otero et al 2005;Kurun et al 2007;Du Laing et al 2008). Special attentions have been paid to Cd, Cu, Pb, Zn and many other heavy metals.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the characteristic of nutrients, total metals, and fecal coliform in Sibu Laut River, Sarawak, Malaysia

et al. 2014

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The concentrations of nutrients (nitrogen and phosphorus), total metals, and fecal coliform (FC) coupling with chlorophyll-a (chl-a), 5-day biochemical oxygen demand (BOD 5 ) and other general environmental parameters were evaluated at the sub-surface and near-bottom water columns of 13 stations in the Sibu Laut River during low and high slack waters. The results indicated that inorganic nitrogen (mainly nitrate) was the primary form of nitrogen whereas organic phosphorus was the major form of phosphorus. The abundance of total heavy metals in Sibu Laut River and its tributaries was in the order of Pb \ Cu \ Zn \ Cd. Fecal coliform concentration was relatively low along Sibu Laut River. The shrimp farm effluents contributed a substantial amount of chl-a, BOD 5 , nutrients, and FC to the receiving creek except for total metals. Nevertheless, the influence was merely noticeable in the intake creek and amended rapidly along Selang Sibu River and brought minimal effects on the Sibu Laut River. Besides, the domestic sewage effluents from villages nearby also contributed a substantial amount of pollutants.

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“…Wetlands are known to interact through biological, geochemical, and hydrological processes with chemical elements in surface waters, resulting in immobilization or release of metals (Du Laing, 2008). The New Jersey Meadowlands contain estuaries located in the New York City/Northern New Jersey metropolitan area, where state and federal agencies have increased interests in restoring wetlands.…”

Section: Introductionmentioning

confidence: 99%

“…In tidal wetlands, the complexities of tidal cycles and their effects on the hydrology and biogeochemistry need to be considered in addition to the biogeochemical processes (Catallo, 2003;Du Laing, 2008;Ma et al, 2008;Seybold, 2002;Taillefert, 2002). Depending on hydrologic conditions, marsh soils can be a) flooded with water levels above the surface, b) saturated with no excess flood-waters, or c) with water level below surface to a certain depth (Inglett et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Trace metal dynamics in the sediments of a constructed and natural urban tidal marsh: The role of iron, sulfide, and organic complexation

ElBishlawi

Shin²,

Jaffé

2013

Ecological Engineering

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a b s t r a c tTwo tidal marshes in the New Jersey Meadowlands, one constructed and one natural were characterized to compare their ability to immobilize trace metals (Cd, Cr, Cu, Mn, Pb, and Zn). Surface and pore waters were sampled four times a year between 2008 and 2010 and sediment cores were collected yearly in the constructed marsh and once in 2010 in the natural marsh. Interactions of trace metals with redox active species such as iron and sulfide as well as with organic matter were investigated. Precipitation with sulfides played a major role in immobilizing certain trace metals, including Cr, Mn, and Pb. At both sites, the presence of sulfide did not preclude the presence of dissolved trace metals in pore-water at concentrations exceeding their metal sulfide solubility product. Thermodynamic equilibrium modeling indicated these dissolved metals remained in solution due to an association with heterogeneous dissolved organic carbon. No net trace metal accumulation in the surficial sediments of the constructed marsh was noted between 2007 and 2010. This implied that a dynamic equilibrium of trace metal flux into and out of the sediments was established, rather than a long-term net accumulation of trace metals. In the constructed marsh, little difference was found between the immobilization potential in the area of intermittent flooding (high marsh) and the area of sustained flooding (low marsh). The newly constructed wetland immobilized significantly more Cr, Mn, and Zn than the natural marsh and similar concentrations of Cd, Cu, and Pb. This may be due to increased redox buffering through a larger FeS buffering pool against tidally induced oxygen delivery.

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Factors Affecting Metal Accumulation, Mobility and Availability in Intertidal Wetlands of the Scheldt Estuary (Belgium)

Cited by 8 publications

References 34 publications

Characterization of dissolved organic matter from a restored urban marsh and its role in the mobilization of trace metals

Characterization of dissolved organic matter from a restored urban marsh and its role in the mobilization of trace metals

Assessment of the characteristic of nutrients, total metals, and fecal coliform in Sibu Laut River, Sarawak, Malaysia

Trace metal dynamics in the sediments of a constructed and natural urban tidal marsh: The role of iron, sulfide, and organic complexation

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