Trace metal fractionation in the Pichavaram mangrove–estuarine sediments in southeast India after the tsunami of 2004

Ranjan, Rajesh Kumar; Singh, Gurmeet; Routh, Joyanto; Ramanathan, Alagappan

doi:10.1007/s10661-013-3167-6

Cited by 21 publications

(7 citation statements)

References 45 publications

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“…The indirect and the most important value of mangroves lie in their protective role (Marchand et al 2012; Ranjan et al 2013). Mangrove forests help in protecting the coastlines by preventing erosion and loss of land cover by depositing large quantities of silt.…”

Section: Introductionmentioning

confidence: 99%

“…The trees with their mat-like pneumatophore roots have high binding capacity for fine-grained clay and silt-rich sediments. Notably, mangrove sediments are characterized by their high organic matter (OM) content, poor nutrient quality, high amount of sulfide, and low oxygen levels (Ranjan et al 2013). This makes mangrove sediments a sink (Aderinola et al 2009), or for that matter even a source for various metal-bound particles that actively participate in the ongoing biogeochemical reactions (Marchand et al 2012).…”

Section: Introductionmentioning

confidence: 99%

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Temporal and spatial distribution of trace metals in the Rufiji delta mangrove, Tanzania

Minu

Routh

Dario

et al. 2018

Environ Monit Assess

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Spatial and temporal distribution of trace metals and their cycling is a key issue for understanding the ongoing biogeochemical processes in coastal environments. Sediment cores were collected from six different sampling locations from the Rufiji delta mangrove forests in southeastern coastal Tanzania that are perceived to be impacted by urban development and agricultural activities in the catchment, and pollution in upstream sections of the Rufiji River. The chronology and sediment accumulation rates at these sampling sites were derived based on the distribution of 210Pbexcess method. The trace metals (As, Cd, Cr, Cu, Ni, Pb, and Zn) were sequentially extracted as per the BCR method and analyzed. The results indicate that the mass accumulation rates range from 0.40 g cm−2 year−1 (cores NR3 and NR4) to 1.75 g cm−2 year−1 (core SR1). Trace metals in the cores are mainly associated with the residual phase and their abundances in sediments are ranked as Cr > Zn > Ni > Cu > Pb > Cd. The results imply that trace metals in the Rufiji delta mangroves are mainly of crustal origin, and they are less sensitive to weathering. Further, these metals are least available for uptake by plants and they pose limited threat to the biota.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Temporal and spatial distribution of trace metals in the Rufiji delta mangrove, Tanzania

Minu

Routh

Dario

et al. 2018

Environ Monit Assess

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“…Because of the channel in the lower reaches, monthly water discharge and sediment loads have greatly increased since regulation was enacted, especially from June to July. Much attention has been given to comparing trace element concentrations Environ Monit Assess (2014) 186:7211-7232both before and after an ecological event (Ye et al 2011;Ranjan et al 2013). Huang et al (2012) applied HJ-1 microsatellite remote sensing data to monitor and evaluate the effect of wetland restoration through water transfer projects in the YRD.…”

Section: Introductionmentioning

confidence: 99%

Contamination assessment of arsenic and heavy metals in a typical abandoned estuary wetland—a case study of the Yellow River Delta Natural Reserve

Xie

Sun

Zhang

et al. 2014

Environ Monit Assess

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Coastal and estuarine areas are often polluted by heavy metals that result from industrial production and agricultural activities. In this study, we investigated the concentration trait and vertical pattern of trace elements, such as As, Cd, Ni, Zn, Pb, Cu, and Cr, and the relationship between those trace elements and the soil properties in coastal wetlands using 28 profiles that were surveyed across the Diaokouhe Nature Reserve (DKHNR). The goal of this study is to investigate profile distribution characteristics of heavy metals in different wetland types and their variations with the soil depth to assess heavy metal pollution using pollution indices and to identify the pollution sources using multivariate analysis and sediment quality guidelines. Principal component analysis, cluster analysis, and pollution level indices were applied to evaluate the contamination conditions due to wetland degradation. The findings indicated that the concentration of trace elements decreased with the soil depth, while Cd increases with soil depth. The As concentrations in reed swamps and Suaeda heteroptera surface layers were slightly higher than those in other land use types. All six heavy metals, i.e., Ni, Cu, As, Zn, Cr, and Pb, were strongly associated with PC1 (positive loading) and could reflect the contribution of natural geological sources of metals into the coastal sediments. PC2 is highly associated with Cd and could represent anthropogenic sources of metal pollution. Most of the heavy metals exhibited significant positive correlations with total concentrations; however, no significant correlations were observed between them and the soil salt and soil organic carbon. Soil organic carbon exhibited a positive linear relationship with Cu, Pb, and Zn in the first soil layer (0-20 cm); As, Cr, Cu, Ni, Pb, and Zn in the second layer (20-40 cm); and As, Cr, Cu, Ni, Pb, and Zn in the third layer (40-60 cm). Soil organic carbon exhibited only a negative correlation with Cd (P<0.05), in the second and third layers. As, Cr, Cu, Ni, Pb, and Zn exhibited lower geoaccumulation index values (I geo values), which averaged less than 0 in the three soil layers, this finding indicates that the soils have remained unpolluted by these heavy metals. The mean concentrations of these trace elements were lower than Class I criteria. The degradation wetland restoration suggestions have also been provided in such a way as to restore the reserved flow path of the Yellow River. The results that are associated with trace element contamination would be helpful in providing scientific directions to restore wetlands across the world.

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“…Samples processed for speciation are treated with reagents of increasing chemical activity, with the selection of reagents depending on the element of interest (e.g.Boszke et al. 2006;Kozak et al 2008;Ranjan et al 2013). Water-leachable salts are among the most commonly analysed chemical fractions and have been determined by titration methods (e.g.Szczuciński et al …”

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confidence: 99%

Applications of geochemistry in tsunami research: A review

Chagué‐Goff

Szczuciński

Shinozaki

2017

Earth-Science Reviews

154

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Trace metal fractionation in the Pichavaram mangrove–estuarine sediments in southeast India after the tsunami of 2004

Cited by 21 publications

References 45 publications

Temporal and spatial distribution of trace metals in the Rufiji delta mangrove, Tanzania

Temporal and spatial distribution of trace metals in the Rufiji delta mangrove, Tanzania

Contamination assessment of arsenic and heavy metals in a typical abandoned estuary wetland—a case study of the Yellow River Delta Natural Reserve

Applications of geochemistry in tsunami research: A review

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