Geochemistry of core sediments from Mullipallam creek, South East coast of India

Sundararajan, M.; Natesan, Usha

doi:10.1007/s12665-009-0414-9

Cited by 15 publications

(10 citation statements)

References 45 publications

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“…The Mn shows an increasing trend from 20 to 12 cm depth, with the highest concentration at 12 cm depth. Above this Mn decreases drastically up to 8 cm followed by a gradual decrease up to (Sundararajan and Natesan 2010). Further, a similar point-to-point variation of Fe and Mn is observed between 56 and 52 cm in the lower section, 30-24 cm in the middle section and 14 cm to the surface in the upper section of the core.…”

Section: Fe Mn and Alsupporting

confidence: 69%

Evaluation of impact of industrial effluents on intertidal sediments of a creek

Volvoikar

Nayak

2013

Int. J. Environ. Sci. Technol.

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A large amount of material in the form of industrial effluents and urban sewage containing metal contaminants directly enters Dudh creek. Metals on entering the creek tend to settle at the bottom and become part of the sediments. The distribution of metals with depth reflects changes in their supply as well as diagenetic modifications with time. In the present study, an attempt has been made to understand the impact of waste discharged from Tarapur Maharashtra Industrial Development Corporation on Dudh creek. Two cores were collected, one close to the creek mouth and the other in the inner part of the creek. Sediment component, organic carbon and metal (vanadium, copper, nickel, lead, zinc, manganese, iron and aluminium) analyses were carried out on the two cores. The variation in the distribution of sediment components with depth reflects changes in hydrodynamic condition of the creek over the years. Increase in concentration of most of the metals in the upper part of the cores indicates additional input in recent years. The core collected in the inner part of the creek showed higher metal and organic carbon concentration as compared to the downstream core. This was very well supported by distribution of points on an isocon plot. Enrichment factor and index of geoaccumulation were used to find the extent of pollution in sediments of the creek. Correlation and R-mode factor analysis have also been computed to understand the association and source of metal input in sediments of Dudh creek.

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Section: Fe Mn and Alsupporting

confidence: 69%

Evaluation of impact of industrial effluents on intertidal sediments of a creek

Volvoikar

Nayak

2013

Int. J. Environ. Sci. Technol.

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“…The classification suggests that the muddy sand sediments observed in many stations were due to the poor wave action and shallow regions in the area [53]. The high value of Fe (62,413 mg kg −1 ) was observed due to the convergence of ephemeral streams and the presence of rich mangrove ecosystems along the southern part of the study area at station 1 [54]. The red inorganic pigment used for painting boats is based on iron (III) oxide (Fe 2 O 3 ).…”

Section: Discussionmentioning

confidence: 87%

Heavy metal pollutants and their spatial distribution in surface sediments from Thondi coast, Palk Bay, South India

Perumal

Antony

Subagunasekar

2021

Preprint

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Background The concentration of heavy metals and their spatial distribution in surface sediments collected from the Thondi coast, Palk Bay, South India were analysed in this study. The sediment grain size, pH, EC, and heavy metal concentrations (Mn, Fe, Cr, Zn, Cd, Ni, Cu, and Pb) were determined and the values for the geoaccumulation index (Igeo), enrichment factor (EF), potential contamination index (Cp), potential ecological risk index (PERI), contamination factor (CF), modified contamination degree (mCd), degree of contamination (Cd), and potential contamination factors (Cp) were calculated based on their background values to determine the pollution level of the study area. The sediment grain size, pH, EC, and heavy metal concentrations were determined and the values for the pollution indices were calculated based on their background values to determine the pollution level. Results The pollution indices, namely EF, CF, Cd, mCd, CP, \({\text{E}}_{\text{r}}^{\text{i}}\), and PERI, except for Igeo, revealed that the heavy metal contamination was due to Cd, while a moderate level of contamination was caused by Cu, Zn, Pb, and Cr. The principal component analysis and correlation matrix analysis showed a strong positive loading for Cd due to its high level of contamination in the study area. Anthropogenic inputs such as municipal wastewater, domestic sewage discharge, fishing harbour activities, and industrial and aquaculture wastes led to the increased Cd concentration in the study area. Moreover, the pollution load index revealed that the sediments were polluted by heavy metals. Conclusion The findings of this study revealed that the increased concentration of heavy metals in the study area increases the toxicity in the marine environment, thus affecting the ecosystem.

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“…Calcium carbonate from the shelf sediments are often derived as carbonate materials and particulate matter from adjacent landmass and through inorganic and organic precipitation from the water column (Sundararajan and Natesan, 2010a). The major sources of carbonate in the sediments from the continental shelf are mainly from the shell fragments of organisms, and dilution of biogenic calcite by detritus in the sediments (Sundararajan and Natesan, 2010a, b).…”

Section: Distribution Of Caco 3 and Ommentioning

confidence: 99%

“…Sediments from the continental shelf zones along the East coast of India have been studied only for their depositional processes (Sundararajan and Natesan, 2010a;Satpathy et al, 2011). Continental shelf sediments serve as an ultimate sink for metals discharged into the aquatic environment (Luoma and Bryan, 1981;Hornberger et al, 1999).…”

Section: Introductionmentioning

confidence: 99%