AI Article Synopsis
- - An extensive survey was conducted to assess heavy metal contamination in sediments from various Southeast Indian ecosystems, including Vellar-Coleroon estuarine, Pichavaram mangrove, and coastal areas, motivated by the proposed construction of a coal thermal power plant and an oil refinery.
- - Key factors like soil texture, pH, total organic carbon (TOC), and heavy metal concentrations (specifically Fe, Mn, Cu, Cd, Zn, and Ni) were analyzed across pre- and post-monsoon seasons, revealing high levels of Fe and Mn and a significant link between TOC and heavy metal presence.
- - The study found that sediments in the mangrove ecosystem had the highest heavy metal levels, particularly cadmium
Article Abstract
An elaborate survey on the contamination of heavy metals was carried out in surface sediments of different ecosystems such as Vellar-Coleroon estuarine, Pichavaram mangrove and coastal region of Parangipettai, Southeast coast of India. The study was intended since, the coal based thermal power plant and oil refinery plant are proposed to set up along this coast and aquaculture industries and dredging activities are developing. The parameters such as soil texture, pH, total organic carbon (TOC) and heavy metal (Fe, Mn, Cu, Cd, Zn and Ni) concentrations were analyzed for the surface sediments during pre and postmonsoon seasons. Among the metals analyzed, Fe and Mn were found to have dominant as the levels were recorded as 11,804 μg g and 845.2 μg g respectively. A significant correlation was observed between total organic carbon (TOC) and heavy metals. In the mangrove ecosystem, the levels of heavy metals found to be maximum indicating that the rich organic matter acts as an efficient binding agent for metals. The overall finding of the present study indicated that the sediments from the entire Vellar-Coleroon estuarine and Pichavaram mangrove ecosystems were found moderately polluted with cadmium metal. The result of cluster analysis indicated disparity in accumulation of heavy metals in sediments of different ecosystems due to the variations in organic matter. The heavy metals were transported from land to coastal through flood during monsoon season reflecting the variations in their levels in different ecosystems at postmonsoon season.
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| http://dx.doi.org/10.1016/j.envpol.2016.07.048 | DOI Listing |
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