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Magnetic studies and elemental analysis of river sediments: a case study from the Ponnaiyar River (Southeastern India).

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Title: Magnetic studies and elemental analysis of river sediments: a case study from the Ponnaiyar River (Southeastern India).
Authors: Chaparro, Marcos1 chapator@exa.unicen.edu.ar, Suresh, G.2, Chaparro, Mauro3, Ramasamy, V.4, Sinito, Ana1
Source: Environmental Earth Sciences. Sep2013, Vol. 70 Issue 1, p201-213. 13p. 3 Charts, 6 Graphs, 1 Map.
Subject Terms: *Magnetic susceptibility, *Magnetism, *Clustering of particles, *Fuzzy control systems, *River sediments, *Magnetization
Geographic Terms: Tamil Nadu (India)
Abstract: The Ponnaiyar River is one of the largest rivers of the Tamil Nadu state (India), flowing a distance of 430 km from its point of origin to the sea. This work contributes with new data of magnetic and elemental composition of river sediments, and improves the knowledge obtained by preliminary and previous studies of rivers from Southeastern India. Magnetic susceptibility, anhysteretic and isothermal remanent magnetization and chemical determinations (major and trace metals) were measured. Magnetic results reveal the predominance of magnetite-like mineral with magnetic grain size variations along the river and in depth. Most of the uppermost samples have the major presence of trace metals and higher values of magnetic concentration. Magnetic and chemical variables were also analysed as potential pollution indicators using multivariate statistical techniques: canonical correlation and fuzzy c-means clustering analyses, which confirmed the existence of relationships, but not in a simple way, between magnetic and chemical variables. Furthermore, fuzzy analysis allows classifying the data in different well-differentiated groups regarding the trace metal load, concentration and feature-dependent parameters. The most polluted samples show high concentration of trace elements and magnetic carriers, softer and coarser magnetic minerals; on the contrary, the unpolluted samples (from the deepest sediments) have the opposite characteristics. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 89769744
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PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
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  Data: Magnetic studies and elemental analysis of river sediments: a case study from the Ponnaiyar River (Southeastern India).
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  Data: <searchLink fieldCode="AR" term="%22Chaparro%2C+Marcos%22">Chaparro, Marcos</searchLink><relatesTo>1</relatesTo><i> chapator@exa.unicen.edu.ar</i><br /><searchLink fieldCode="AR" term="%22Suresh%2C+G%2E%22">Suresh, G.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Chaparro%2C+Mauro%22">Chaparro, Mauro</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Ramasamy%2C+V%2E%22">Ramasamy, V.</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Sinito%2C+Ana%22">Sinito, Ana</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Environmental+Earth+Sciences%22">Environmental Earth Sciences</searchLink>. Sep2013, Vol. 70 Issue 1, p201-213. 13p. 3 Charts, 6 Graphs, 1 Map.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Magnetic+susceptibility%22">Magnetic susceptibility</searchLink><br />*<searchLink fieldCode="DE" term="%22Magnetism%22">Magnetism</searchLink><br />*<searchLink fieldCode="DE" term="%22Clustering+of+particles%22">Clustering of particles</searchLink><br />*<searchLink fieldCode="DE" term="%22Fuzzy+control+systems%22">Fuzzy control systems</searchLink><br />*<searchLink fieldCode="DE" term="%22River+sediments%22">River sediments</searchLink><br />*<searchLink fieldCode="DE" term="%22Magnetization%22">Magnetization</searchLink>
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  Label: Geographic Terms
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  Data: <searchLink fieldCode="DE" term="%22Tamil+Nadu+%28India%29%22">Tamil Nadu (India)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The Ponnaiyar River is one of the largest rivers of the Tamil Nadu state (India), flowing a distance of 430 km from its point of origin to the sea. This work contributes with new data of magnetic and elemental composition of river sediments, and improves the knowledge obtained by preliminary and previous studies of rivers from Southeastern India. Magnetic susceptibility, anhysteretic and isothermal remanent magnetization and chemical determinations (major and trace metals) were measured. Magnetic results reveal the predominance of magnetite-like mineral with magnetic grain size variations along the river and in depth. Most of the uppermost samples have the major presence of trace metals and higher values of magnetic concentration. Magnetic and chemical variables were also analysed as potential pollution indicators using multivariate statistical techniques: canonical correlation and fuzzy c-means clustering analyses, which confirmed the existence of relationships, but not in a simple way, between magnetic and chemical variables. Furthermore, fuzzy analysis allows classifying the data in different well-differentiated groups regarding the trace metal load, concentration and feature-dependent parameters. The most polluted samples show high concentration of trace elements and magnetic carriers, softer and coarser magnetic minerals; on the contrary, the unpolluted samples (from the deepest sediments) have the opposite characteristics. [ABSTRACT FROM AUTHOR]
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=89769744
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1007/s12665-012-2116-y
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 13
        StartPage: 201
    Subjects:
      – SubjectFull: Magnetic susceptibility
        Type: general
      – SubjectFull: Magnetism
        Type: general
      – SubjectFull: Clustering of particles
        Type: general
      – SubjectFull: Fuzzy control systems
        Type: general
      – SubjectFull: River sediments
        Type: general
      – SubjectFull: Magnetization
        Type: general
      – SubjectFull: Tamil Nadu (India)
        Type: general
    Titles:
      – TitleFull: Magnetic studies and elemental analysis of river sediments: a case study from the Ponnaiyar River (Southeastern India).
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          Name:
            NameFull: Chaparro, Marcos
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            NameFull: Suresh, G.
      – PersonEntity:
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            NameFull: Chaparro, Mauro
      – PersonEntity:
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            NameFull: Ramasamy, V.
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            NameFull: Sinito, Ana
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            – D: 01
              M: 09
              Text: Sep2013
              Type: published
              Y: 2013
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              Value: 70
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            – TitleFull: Environmental Earth Sciences
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