Trace metals in the coastal soils developed from estuarine floodplain sediments in the Croatian Mediterranean region

Romić, Davor; Romić, Marija; Zovko, Monika; Bakić, Helena; Ondrašek, Gabrijel

doi:10.1007/s10653-012-9449-z

Cited by 58 publications

(33 citation statements)

References 41 publications

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“…9.2). IDW uses the measured values surrounding the interpolation points, which are then weighted according to their distance from the point being interpolated (Carr et al 2008;Romic et al 2012). This interpolation is a relatively easy method because it depends on the distance between the sampling sites and prediction points only.…”

Section: Map Productionmentioning

confidence: 99%

“…When the natural and anthropogenic processes affected together in the floodplain, the behavior of heavy metals was likely to change because of the altered environmental conditions (Romic et al 2012). The presence of metals, like Cu, Zn, or Pb, might be partly attributed to sediment deposition brought by river flow and partly attributed to anthropogenic interventions after reclamation.…”

Section: Enrichment Status Of Heavy Metals In Different Reclamation Zmentioning

confidence: 99%

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Relationships between heavy metal concentrations in soils and reclamation history in the reclaimed coastal area of Chongming Dongtan of the Yangtze River Estuary, China

Zheng

Zhao

et al. 2014

J Soils Sediments

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Purpose Reclaimed coastal wetlands are an important land resource because of the shortage of cultivated land in coastal areas, but few studies have focused on contamination of heavy metals in reclaimed agricultural soils, especially in soils that have experienced long-term agricultural activities. This study was carried out in Chongming Dongtan of the Yangtze Estuary, which has undergone large-scale reclamation activities, with the aim of determining the concentrations and spatial distributions of heavy metals in different reclaimed zones. Materials and methods In this study, 50 soil samples were collected in the study area, which was divided into three zones based on the history of reclamation (post-1998, 1990s, and 1960s) and intertidal flats. Soil metals (Al, Fe, Mn, Cu, Cr, Ni, Zn, and Pb), soil pH, Eh, salinity, soil organic matter (SOM), and grain sizes were analyzed. Correlation analysis and factor analysis were employed to extract the main influencing factors on heavy metals in reclaimed soils. Al-normalization was used to remove the grain-size effect. The enrichment ratio (ER) was applied to reflect the chronological change of heavy metals after reclamation. Inverse distance weighted (IDW) interpolation was used to create spatial distribution maps of the measured heavy metals.Results and discussion There were significant positive correlations (p<0.01) between the fine particle fractions (<20 μm) of soils and metal concentrations. Background deposition of metals in the study area increased relative to the reference values of each zone during the last 50 years. In zone post-1998, the concentrations of Cu, Zn, and Pb after reclamation were lower than those before reclamation, but not for Cr; in zone 1960s and 1990s, the concentrations of Cu, Cr, Zn, and Pb were higher than those before reclamation. In all the zones, the reclamation process had little impact on the mobilization of Ni. Our results showed that after Al-normalization, the differences of heavy metal concentrations between different zones and their spatial distribution patterns were due to the combined effects of both background deposition and anthropogenic processes, particularly in zone 1960s. Conclusions The current heavy metal concentrations were mainly determined by the deposition background in Chongming Dongtan, but the reclamation history had certain effects on heavy metal concentrations in the reclaimed soils. The desalination leaching effect on heavy metals was mainly found for soils with short-term reclamation (zone post-1998), but with longer reclamation history (like zone 1960s and 1990s); long-term agricultural activities had greatly influenced the concentrations of heavy metals.

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Section: Map Productionmentioning

confidence: 99%

Section: Enrichment Status Of Heavy Metals In Different Reclamation Zmentioning

confidence: 99%

Relationships between heavy metal concentrations in soils and reclamation history in the reclaimed coastal area of Chongming Dongtan of the Yangtze River Estuary, China

Zheng

Zhao

et al. 2014

J Soils Sediments

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“…Trace metals may get segregated between fluvial morphologic units due to hydraulic sorting by size and density and due to the different residency time of sediments in different units (Ladd et al 1998). Studying the relation between trace metals concentration in arable soils of two reclaimed land zones (fluvial terraces and polder-type lower-laying terraces) in the study region, Romic et al (2012) found that soils on the fluvial terraces developed from the mixed dredged sediments have higher Cd and Cu concentrations, which is apparently caused by specific land use and traditional agricultural practice.…”

Section: Discussionmentioning

confidence: 99%

“…Surface Quaternary sediments consist mainly of peat and clay (organic marshy deposits), which are underlain by clayey sands, sands of variable grain size, sandy clay, gravelly sands, sandy gravel and Holocene gravels (alluvial sediments), as well as Pleistocene conglomerates. Geomorphology, soil characteristics and reclamation in the study area are described in detail by Romic et al (2012). Agriculture is the main activity in the area of the River Neretva delta, primarily dominated by vegetable production and citrus growing applying irrigation.…”

Section: Study Sitementioning

confidence: 99%

Geochemistry of stream sediments within the reclaimed coastal floodplain as indicator of anthropogenic impact (River Neretva, Croatia)

Kralj

Romić

et al. 2015

J Soils Sediments

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Purpose This study used multi-element signatures of stream sediments to assess both natural and human-induced impact on fluvial system in the River Neretva delta receiving environment over time. The river basin actually comprises several sub-catchments, and the geochemical features of major elements, trace metals radiometric and mineralogical characterisation of river bed sediments were used to assist the interpretation of the environment of deposition and its subsequent modifications caused by various anthropogenic pressures within the river basin. Materials and methods Five sites were chosen for sediment sampling at key locations within the study area with assumed undisturbed, continuous sedimentation process. At each of the sites, three representative cores were taken by scuba divers. Sample sites were selected in order to reflect the influence of different sub-catchments they belong to and the land-use pattern of the surrounding area. Samples were analysed for pH, redox-potential, granulometry, mineralogy, thermogravimetry, major and trace element concentrations and radionuclide activities. The univariate and multivariate statistics were applied. The geochemical normalisation of data was done using Al, the procedure based on calculation of the regression line of the metal on the normaliser followed by testing the ratios metal/ normaliser on all data-points. Results and discussion All studied sediments are classified as silt, ranging from clayey silt to silt and sandy silt. Mineralogically, the sediments were dominated by carbonates and quartz. The chemical contaminant data are generally of good quality, mostly below guideline levels. Sedimentation rates were estimated using vertical distribution of 137 Cs activities. Normalisation of TMs done by using Al shows strong R 2 adj values for the regressions of Al and V, Al and Cr, and Al and Ni. However, Al cannot fairly explain the fluctuation of the concentrations of Cd, Cu, Pb and Zn in sediment cores from all of the sampling sites. Generally, inorganic scavengers such as clay minerals followed by Fe and Mn oxides and S (pyrite and gypsum) seem to be dominant factors controlling TMs in studied sediments. Conclusions Although the River Neretva delta occupies a rather small area, the geochemical features of major and trace elements and 137 Cs activities show complex sediment provenances. Each of the sampling sites reflect exactly different effects of anthropogenic intervention that particularly refer to the changes in river morphology and ecology, along with the altered flow regimes within the catchment on sediment loads and quality.

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“…Borůvka and Kozák (2001) reported that spatial heterogeneity of coastal plain soils differed greatly from that of natural soils due to their anthropogenic origin. With the rapid development of agriculture and industry after reclamation, excessive agro-chemical inputs into these soils can impose a long-term burden on the biochemical cycle (Romic et al, 2012). Li et al (2008) concluded that land use changes in reclaimed regions resulted in soil quality changes and that a redistribution of materials and energy occurred.…”

Section: Introductionmentioning

confidence: 99%

Spatial variability of heavy metals in the coastal soils under long-term reclamation

Wang

Coles

et al. 2014

Estuarine, Coastal and Shelf Science

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Trace metals in the coastal soils developed from estuarine floodplain sediments in the Croatian Mediterranean region

Cited by 58 publications

References 41 publications

Relationships between heavy metal concentrations in soils and reclamation history in the reclaimed coastal area of Chongming Dongtan of the Yangtze River Estuary, China

Relationships between heavy metal concentrations in soils and reclamation history in the reclaimed coastal area of Chongming Dongtan of the Yangtze River Estuary, China

Geochemistry of stream sediments within the reclaimed coastal floodplain as indicator of anthropogenic impact (River Neretva, Croatia)

Spatial variability of heavy metals in the coastal soils under long-term reclamation

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