Heavy metal distribution in sediment profiles of the Pearl River estuary, South China

Li, Xiangdong; Wai, Onyx W. H.; Li, Y.S.; Coles, Barry J.; Ramsey, Michael H.; Thornton, I.

doi:10.1016/s0883-2927(99)00072-4

Cited by 339 publications

(190 citation statements)

References 18 publications

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“…1) using a gravity corer equipped with an automatic clutch and reverse catcher. Each core was then sliced into sections at 10-cm intervals from 0 to 1 m and at 20-cm intervals from 1 to 2 m in depth (Li et al, 2000a). The physicochemical properties including organic matter (loss on ignition at 450 C for 6 h) and particle size distribution were determined according to the methods described by Mudrich et al (1996).…”

Section: Sampling and Sample Preparationmentioning

confidence: 99%

“…Afterwards, trace and major elements were determined by inductively coupled plasma-atomic emission spectrometry (ICP-AES, Perkin-Elmer Optima 3300DV). The details of the total metal concentration measurements can be found elsewhere (Li et al, 2000a).…”

Section: Chemical Analysismentioning

confidence: 99%

“…The second is the enriched trend at the top layers of the profiles in the western coastal zones, which indicates the accumulation of metal pollutants from adjacent land sources under relatively stable and normal sedimentation processes, particularly in recent years. The last is the uniform pattern in the inter-tidal area, where strong mixing is caused by tidal currents, and the high salinity of the marine water facilitates the element diffusion through the profiles (Li et al, 2000a).…”

Section: Metal Concentrations In the Profilesmentioning

confidence: 99%

“…the lithogenous component (Rubio et al, 2000). As for Mg and Ca (PC 3), both are usually affiliated to the marine water and sedimentation processes (Li et al, 2000a), and show apparent distinct patterns from other elements in the PCA.…”

Section: Selection Of Normalizer Elementsmentioning

confidence: 99%

“…slow current) and high clay contents may facilitate the pollutant deposition in the western shallow water areas. The inputs from the main tributaries and marine traffic, and strong mixing effects can cause elevated heavy metal concentrations in the east channels (Li et al, 2000a).…”

Section: Metal Enrichment By the Linear Baseline Modelmentioning

confidence: 99%

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Multivariate statistical study of heavy metal enrichment in sediments of the Pearl River Estuary

Liu

Shen

et al. 2003

Environmental Pollution

374

159

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analysis identified the heavy metal accumulation layers of sediment profiles and showed the various sources of metals in the estuary. AbstractThe concentrations and chemical partitioning of heavy metals in the sediment cores of the Pearl River Estuary were studied. Based on Pearson correlation coefficients and principal component analysis results, Al was selected as the concentration normalizer for Pb, while Fe was used as the normalizing element for Co, Cu, Ni and Zn. In each profile, sections with metal concentrations exceeding the upper 95% prediction interval of the linear regression model were regarded as metal enrichment layers. The heavy metal accumulation mainly occurred at sites in the western shallow water areas and east channel, which reflected the hydraulic conditions and influence from riparian anthropogenic activities. Heavy metals in the enrichment sections were evaluated by a sequential extraction method for possible chemical forms in sediments. Since the residual, Fe/Mn oxides and organic/sulfide fractions were dominant geochemical phases in the enriched sections, the bioavailability of heavy metals in sediments was generally low. The 206 Pb/ 207 Pb ratios in the metal-enriched sediment sections also revealed the influence of anthropogenic sources. The spatial distribution of cumulative heavy metals in the sediments suggested that the Zn and Cu mainly originated from point sources, while the Pb probably came from non-point sources in the estuary. #

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Section: Sampling and Sample Preparationmentioning

confidence: 99%

Section: Chemical Analysismentioning

confidence: 99%

Section: Metal Concentrations In the Profilesmentioning

confidence: 99%

Section: Selection Of Normalizer Elementsmentioning

confidence: 99%

Section: Metal Enrichment By the Linear Baseline Modelmentioning

confidence: 99%

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Multivariate statistical study of heavy metal enrichment in sediments of the Pearl River Estuary

Liu

Shen

et al. 2003

Environmental Pollution

374

159

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Anthropophile elements in river sediments: Overview from the Seine River, France

Chen

Gaillardet

Bouchez

et al. 2014

Geochem Geophys Geosyst

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In contrast to larger river systems that drain relatively pristine basins, little is known about the sediment geochemistry of rivers impacted by intense human activities. In this paper, we present a systematic investigation of the anthropogenic overprints on element geochemistry in sediments of the humanimpacted Seine River, France. Most elements are fractionated by grain size, as shown by the comparison between suspended particulate matter (SPM) and riverbank deposits (RBD). The RBD are particularly coarse and enriched in carbonates and heavy minerals and thus in elements such as Ba, Ca, Cr, Hf, Mg, Na, REEs, Sr, Ti, Th, and Zr. Although the enrichment/depletion pattern of some elements (e.g., K, REEs, and Zr) can largely be explained by a binary mixture between two sources, other elements such as Ag, Bi, Cr, Cd, Co, Cu, Fe, Mo, Ni, Pb, Sb, Sn, W, and Zn in SPM in Paris show that a third end-member having anthropogenic characteristics is needed to account for their enrichment at low water stage. These ''anthropophile'' elements, with high enrichment factors (EFs) relative to the upper continental crust (UCC), display a progressive enrichment downstream and different geochemical behaviors with respect to the hydrodynamic conditions (e.g., grain size) compared to elements having mainly a natural origin. Our findings emphasize the need for systematic studies of these anthropophile elements in other human-impacted rivers using geochemical normalization techniques, and stress the importance of studying the chemical variability associated with hydrodynamic conditions when characterizing riverine element geochemistry and assessing their flux to the ocean.

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Trace Elements in Sediments and Mussels – Spatial Distribution, Chemical Partitioning, and Risk Assessment

Khairy

Kolb

Schmidt

et al. 2010

CLEAN Soil Air Water

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Sediment samples were collected from 30 different locations in Abu Qir Bay (Mediterranean Sea), East Alexandria, Egypt and analyzed for trace elements. The highest concentrations of most of the elements were observed in the nearshore stations in the vicinity of the major anthropogenic activities as industrial settlements, waste-water discharges, and agricultural drainage. In addition, mussel samples of Mactra corallina and Tapes decussata were collected corresponding to the sediment samples. Concentrations of As, Cd, Cr, Mn, and Zn in the mussel tissues were higher than concentrations in sediments, thus indicating their relatively high bioavailability. Sequential extraction procedure was performed on selected sediment samples. Significant correlations were observed between the concentrations of Cu, Mn, Pb, and Zn in the exchangeable fraction of the sediments and the corresponding tissues of M. corallina. The output of the risk assessment applied on the sediments revealed that adverse ecological effects to benthic species could occur and that a higher level of risk is expected from the exposure to Cd, Cr, Hg, and Zn. No adverse carcinogenic or non-carcinogenic human health effects are expected from the consumption of the two mussel species from Abu Qir Bay.

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Heavy metal distribution in sediment profiles of the Pearl River estuary, South China

Cited by 339 publications

References 18 publications

Multivariate statistical study of heavy metal enrichment in sediments of the Pearl River Estuary

Multivariate statistical study of heavy metal enrichment in sediments of the Pearl River Estuary

Anthropophile elements in river sediments: Overview from the Seine River, France

Trace Elements in Sediments and Mussels – Spatial Distribution, Chemical Partitioning, and Risk Assessment

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