Journal ArticleDOI
Spatial distribution of heavy metals in surficial sediments from Guanabara Bay: Rio de Janeiro, Brazil
José Antônio Baptista Neto,José Antônio Baptista Neto,Franz Xaver Gingele,Thomas Leipe,Isa Brehme +4 more
TLDR
In this article, surface sediment samples were collected in Guanabara Bay, one of the most prominent urban bays in SE Brazil, to investigate the spatial distribution of anthropogenic pollutants.Abstract:
Ninety-two surface sediment samples were collected in Guanabara Bay, one of the most prominent urban bays in SE Brazil, to investigate the spatial distribution of anthropogenic pollutants. The concentrations of heavy metals, organic carbon and particle size were examined in all samples. Large spatial variations of heavy metals and particle size were observed. The highest concentrations of heavy metals were found in the muddy sediments from the north western region of the bay near the main outlets of the most polluted rivers, municipal waste drainage systems and one of the major oil refineries. Another anomalous concentration of metals was found adjacent to Rio de Janeiro Harbour. The heavy metal concentrations decrease to the northeast, due to intact rivers and the mangrove systems in this area, and to the south where the sand fraction and open-marine processes dominate. The geochemical normalization of metal data to Li or Al has also demonstrated that the anthropogenic input of heavy metals have altered the natural sediment heavy metal distribution.read more
Citations
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Anthropogenic impacts on heavy metal concentrations in the coastal sediments of Dumai, Indonesia.
TL;DR: Heavy metal concentrations found in the present study were comparable to other regions of the world and based on the calculated indices it can be classified as unpolluted to moderately polluted coastal environment.
Journal ArticleDOI
Multivariate statistical and GIS-based approach to identify source of anthropogenic impacts on metallic elements in sediments from the mid Guangdong coasts, China.
TL;DR: Results revealed that Hg, Pb, and Sr largely originated from human activities, while Cu, Ni, Co, Al, and Fe mainly from natural rock weathering, suggesting possible anthropogenic pollution.
Journal ArticleDOI
Selective separation of copper(II) and nickel(II) from aqueous media using the complexation–ultrafiltration process
TL;DR: The polyethylenimine as complexing agent was used to study the complexation-ultrafiltration (CP-UF) process in the selective removal of Cu(II) from Ni( II) contained in aqueous media, and process selectivity was observed.
Journal ArticleDOI
Microplastic pollution of the beaches of Guanabara Bay, Southeast Brazil
TL;DR: In this paper, a large proportion of the plastics found in the ocean are in the form of microplastics (i.e., micro-plastic fractions) and it is widely recognized as an important marine environmental pollutant.
Journal ArticleDOI
Metal contamination of surface soils of industrial city Sialkot, Pakistan: a multivariate and GIS approach.
TL;DR: The results highlighted concentration of Cd, Ni, Cr, Zn, and Pb measured in urban soil exceeded the permissible limit of surface soils and advocated an imperative need for detailed baseline investigations of spatial distribution of heavy metals and other contaminants for the formulation of geochemical database.
References
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Journal ArticleDOI
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Karl K. Turekian,K. H. Wedepohl +1 more
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Book
Metals in the hydrocycle
Wim Salomons,Ulrich Förstner +1 more
TL;DR: In this paper, the authors studied the relationship between metal oxides and organic compounds and found that oxides are more likely to interact with organic compounds than with other organic compounds in the environment.
Journal ArticleDOI
A global assessment of natural sources of atmospheric trace metals
TL;DR: For most of the toxic metals, the natural fluxes are small compared with emissions from industrial activities, implying that mankind has become the key agent in the global atmospheric cycle of trace metals and metalloids as mentioned in this paper.