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A comparative study of atomic absorption spectrophotometry and anodic stripping voltammetry for the determination of trace metals Zn, Cd, Pb and Cu in coastal waters of Visakhapatnam, east coast of India

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Title A comparative study of atomic absorption spectrophotometry and anodic stripping voltammetry for the determination of trace metals Zn, Cd, Pb and Cu in coastal waters of Visakhapatnam, east coast of India
 
Creator Murty, P V S Prabhakara
Satyanarayana, D
 
Description 365-369
Concentration
levels of some of the dissolved trace metals like Zn, .Cd, Pb and Cu have been
determined in the coastal waters along three transects (Gangavaram, Harbour and
Rushi hill) near Visakhapatnam. Estimations, made by anodic stripping
voltammetry in the present study are in good agreement with the reported values
by atomic absorption spectrophotometry. Vertical distribution of dissolved Zn,
Cd and Cu showed an increasing trend from the surface waters to bottom. Surface
depletion and bottom enrichment of these elements resembling those of the distribution
pattern of nutrients are attributed to their involvement in bio-geochemical
cycles. Dissolved Pb showed enrichment in surface compared to bottom waters
indicating anthropogenic input. Dissolved Zn, Cd and Cu showed significant
positive correlations among

themselves and with nutrients
indicating their common association and source of occurrence. The atomic ratios
of Zn to Si and Cd to N were found to be higher while, that of Cd to P was
lower when compared with those of the offshore waters of the Bay
of Bengal. This was attributed to the differences in the
biological uptake of these metals.
 
Date 2014-01-15T09:50:29Z
2014-01-15T09:50:29Z
1999-12
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/25717
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.28(4) [December 1999]