Lithium — a new approach for the granulometric normalization of trace metal data

Loring, D. H.

doi:10.1016/0304-4203(90)90011-z

Cited by 245 publications

(112 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The sediments inside the 95% confidence band can be characterized as having natural mercury concentration, while all stations above this band are characterized as contaminated sediments. 30,36 The influence of anthropogenic factors on the mercury concentration could be verified in scatter plots because several points were projected above the 95% confidence band. An impact caused by the effluents from industries was verified in the Piaçaguera Channel (stations 9, 10 and 11).…”

Section: Normalization Of Mercury Datamentioning

confidence: 95%

Evaluation of mercury contamination in sediments from Santos - São Vicente Estuarine System, São Paulo State, Brazil

Hortellani¹,

Sarkis²,

Bonetti³

et al. 2005

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

A distribuição da contaminação por mercúrio no sistema estuarino de Santos -São Vicente foi observada pela análise de 31 amostras de sedimentos coletadas desse sistema, incluindo as áreas de manguezais localizadas em zonas sob influência urbana, industrial e portuária. Os valores obtidos de Hg variaram de 0,04 a 1,19 μg g -1 , sendo que cerca de 90% das amostras apresentaram concentrações superiores a 0,13 μg g -1 , limite estabelecido pela legislação Canadense e adotado pela Companhia de Tecnologia e Saneamento Ambiental de São Paulo (CETESB), abaixo do qual não é observado efeito adverso na comunidade biológica. Entre estas, cerca de 35% possui teor de Hg > 0,70 μg g -1 , provável nível de ocorrência de efeito adverso à comunidade biológica, indicando um aumento devido às atividades industriais, portuárias e urbanas. A fim de se verificar a relação entre os parâmetros investigados, foi feita análise estatística empregando-se o software SPSS-10.0. Utilizou-se o teor de lama para normalizar o de Hg, como recurso para detectar o grau de contaminação da região.The distribution of mercury contamination in the Santos -São Vicente Estuarine System was observed through the analysis of 31 sediments samples collected from that system, including mangrove areas under urban, industrial and harbor influence zones. The range of values obtained was between 0.04 and 1.19 μg g -1 . About 90% of samples presented Hg > 0.13 μg g -1 levels, which is the limit established by Canadian legislation and adopted by the environmental control agency of São Paulo State -Brazil (CETESB), below which no adverse effect on the biological community has been observed. About 35% of these samples presented concentrations of Hg > 0.70 μg g -1 , the probable level of occurrence of adverse effect on the biological community. These results indicate an increase in the mercury levels caused by industrial, port and urban activities. A statistical study was carried out, using the SPSS-10.0 software, to verify relationships among all the investigated parameters. Normalization of mercury with mud content was used to detect the degree of mercury contamination in this area.

show abstract

Section: Normalization Of Mercury Datamentioning

confidence: 95%

Evaluation of mercury contamination in sediments from Santos - São Vicente Estuarine System, São Paulo State, Brazil

Hortellani¹,

Sarkis²,

Bonetti³

et al. 2005

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

show abstract

“…For instance, generally, the finer a sediment the greater its concentration of both natural and anthropogenic pollutants (e.g. its trace metal concentration Salomons and Forstner, 1980;Thorne and Nickless, 1981;Loring, 1990), radionuclide content (Aston et al, 1985;Bonnett et al, 1988;Oldfield et al, 1993;Clifton et al, 1997Clifton et al, , 1999McCubbin et al, 2000) or polychlorinated biphenyls (PCBs) quantity (Klamer et al, 1990;Camacho-Ibar and McEvoy, 1996). Typically, this is due to finer grained sediments possessing larger specific surface areas, surface charges and cation exchange capacities, which enhance the extent of their preferential chemical adsorption.…”

Section: Introductionmentioning

confidence: 99%

Use of mineral magnetic concentration data as a particle size proxy: A case study using marine, estuarine and fluvial sediments in the Carmarthen Bay area, South Wales, U.K.

Booth

Walden

Neal

et al. 2005

Science of The Total Environment

View full text Add to dashboard Cite

Compositional (non-magnetic) data can correlate strongly with particle size, which deems it appropriate as a particle size proxy and, therefore, a reliable means of normalising analytical data for particle size effects. Previous studies suggest magnetic concentration parameters represent an alternative means of normalising for these effects and, given the speed, low-cost and sensitivity of the measurements may, therefore, offer some advantages over other compositional signals. In this work, contemporary sediments from a range of depositional environments have been analysed with regard to their mineral magnetic concentration and textural characteristics, to observe if the strength and nature of the relationship identified in previous studies is universal. Our data shows magnetic parameters (v LF , v ARM and SIRM) possess contrasting relationships with standard textural parameters for sediment samples collected from marine (Carmarthen Bay), estuarine (Gwendraeth Estuary) and fluvial (Rivers Gwendraeth Fach and Gwendraeth Fawr) settings. Magnetic concentrations of sediments from both the marine and estuarine environments are highly influenced by the magnetic contribution of finer particle sizes; Gwendraeth Fawr River sediments are influenced by the magnetic contribution of coarser particle sizes, while sediments from the Gwendraeth Fach River are not influenced significantly by any variations in textural properties. These results indicate mineral magnetic measurements have considerable potential as a particle size proxy for particular sedimentary environments, which in certain instances could be useful for geochemical, sediment transport, and sediment provenance studies. However, the data also highlight the importance of fully determining the nature of the relationship between sediment particle size and magnetic properties before applying mineral magnetic data as a particle size proxy. D

show abstract

“…Geochemical normalization of specific metals within bottom sediments to 'conservative' elements, such as lithium (Li) and aluminum (Al), has been used with varying degrees of success to differentiate natural accumulation from anthropogenic inputs, and to reduce the trace metal variability caused by grain size as well as by mineralogy (Loring, 1990;Hirst, 1962a,b). While Loring (1990) determined that Li is a good standard for normalization of samples from eastern Canadian estuarine and coastal sediments, Muschenheim et al (2010) reported that normalization of metal concentrations vs. Li failed to produce a good correlation in samples from the sediments of Sable Island Bank because of the detection limitations in the Li data.…”

Section: Produced Water and Bottom Sediment Trace Metal Analysismentioning

confidence: 99%

Analysis of bacterial diversity and metals in produced water, seawater and sediments from an offshore oil and gas production platform

Yeung

Law

Milligan

et al. 2011

Marine Pollution Bulletin

View full text Add to dashboard Cite

Produced water is one of the largest waste products routinely discharged into the ocean from offshore oil and gas platforms. This study analyzed bacterial communities and metals in the produced water, surrounding seawater, and sediment around the Thebaud platform. The bacterial community within the produced water was different from the seawater (SAB = 13.3), but the discharge had no detectable effect on the bacterial communities in the seawater (SAB > 97). In contrast, genomic analysis of sediments revealed that the bacterial community from 250 m was different (SAB = 70) from other locations further from the discharge, suggesting that the produced water had a detectable effect on the bacterial community in the sediment closest to the discharge. These near-field sediments contained elevated concentrations of manganese and iron that are associated with the produced water effluent. The results suggested that the discharge of produced water has influenced the bacterial community structure of sediments adjacent to the platform.Crown

show abstract

Lithium — a new approach for the granulometric normalization of trace metal data

Cited by 245 publications

References 16 publications

Evaluation of mercury contamination in sediments from Santos - São Vicente Estuarine System, São Paulo State, Brazil

Evaluation of mercury contamination in sediments from Santos - São Vicente Estuarine System, São Paulo State, Brazil

Use of mineral magnetic concentration data as a particle size proxy: A case study using marine, estuarine and fluvial sediments in the Carmarthen Bay area, South Wales, U.K.

Analysis of bacterial diversity and metals in produced water, seawater and sediments from an offshore oil and gas production platform

Contact Info

Product

Resources

About