Assessment of Heavy Metal Contamination in Marine Sediments of East Coast of Tamil Nadu Affected by Different Pollution Sources

2017 ◽  
Vol 121 (1-2) ◽  
pp. 418-424 ◽  
Author(s):  
N. Harikrishnan ◽  
R. Ravisankar ◽  
A. Chandrasekaran ◽  
M. Suresh Gandhi ◽  
K.V. Kanagasabapathy ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Marine Sediments ◽  
Metal Contamination ◽  
Tamil Nadu ◽  
East Coast ◽  
Heavy Metal Contamination ◽  
Pollution Sources

scholarly journals Decline in heavy metal contamination in marine sediments in Jakarta Bay, Indonesia due to increasing environmental regulations

2011 ◽  
Vol 92 (2) ◽  
pp. 297-306 ◽  
Author(s):  
Takahiro Hosono ◽  
Chih-Chieh Su ◽  
Robert Delinom ◽  
Yu Umezawa ◽  
Tomoyo Toyota ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Marine Sediments ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Environmental Regulations

scholarly journals Structure of Sediment-Associated Microbial Communities along a Heavy-Metal Contamination Gradient in the Marine Environment

2005 ◽  
Vol 71 (2) ◽  
pp. 679-690 ◽  
Author(s):  
David C. Gillan ◽  
Bruno Danis ◽  
Philippe Pernet ◽  
Guillemette Joly ◽  
Philippe Dubois
Keyword(s):  
Heavy Metal ◽  
Marine Environment ◽  
Marine Sediments ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Dry Weight ◽  
Contaminated Site ◽  
Wide Range ◽  
Metal Levels ◽  
Extractable Metals

ABSTRACT Microbial community composition and structure were characterized in marine sediments contaminated for >80 years with cadmium, copper, lead, and zinc. Four sampling sites that encompass a wide range of sediment metal loads were compared in a Norwegian fjord (Sørfjord). HCl-extractable metals and organic matter constantly decreased from the most contaminated site (S1) to the control site (S4). All sampling sites presented low polychlorinated biphenyl (PCB) concentrations (Σ7PCB < 7.0 ng g [dry weight]−1). The biomass ranged from 4.3 × 108 to 13.4 × 108 cells g (dry weight) of sediments−1 and was not correlated to metal levels. Denaturing gradient gel electrophoresis indicated that diversity was not affected by the contamination. The majority of the partial 16S rRNA sequences obtained were classified in the γ- and δ-Proteobacteria and in the Cytophaga-Flexibacter-Bacteroides (CFB) bacteria. Some sequences were closely related to other sequences from polluted marine sediments. The abundances of seven phylogenetic groups were determined by using fluorescent in situ hybridization (FISH). FISH was impaired in S1 by high levels of autofluorescing particles. For S2 to S4, the results indicated that the HCl-extractable Cu, Pb, and Zn were negatively correlated with the abundance of γ-Proteobacteria and CFB bacteria. δ-Proteobacteria were not correlated with HCl-extractable metals. Bacteria of the Desulfosarcina-Desulfococcus group were detected in every site and represented 6 to 14% of the DAPI (4′,6′-diamidino-2-phenylindole) counts. Although factors other than metals may explain the distribution observed, the information presented here may be useful in predicting long-term effects of heavy-metal contamination in the marine environment.

Causes of heavy metal contamination in groundwater of Tuticorin industrial block, Tamil Nadu, India

2021 ◽  
Author(s):  
Sivakumar Karthikeyan1 ◽  
Shanmugasundaram Arumugam ◽  
Jayaprakash Muthumanickam ◽  
Prabakaran Kulandaisamy ◽  
Muthusamy Subramanian ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Contamination ◽  
Tamil Nadu ◽  
Heavy Metal Contamination
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