Record Details

Physico-chemical and geochemical studies in Pulicat lake, east coast of India

NOPR - NISCAIR Online Periodicals Repository

View Archive Info
 
 
Field Value
 
Title Physico-chemical and geochemical studies in Pulicat lake, east coast of India
 
Creator Padma, S.
Periakali, P.
 
Description 434-437
Physico-chemical
parameters like pH, salinity, alkalinity, nutrients (nitrite, phosphate
and silicate) and major ions (Ca, Mg, Na and K) were determined in 12 water
samples and calcium carbonate, organic carbon, sand, silt, clay percentages and
trace-element (Fe, Mn, As and Cd) concentrations were analysed in 12 sediment
samples. The results show that the concentration

of As in the
sediments during premonsoon and postmonsoon ranges from 10.1 - 51.0 μg/g and
18.3 - 57.3 μg/g. respectively; for Cd, 3.6 - 8.6 μg/g and 4.7 - 11.5 μg/g.
Salinity of the water samples during premonsoon ranges between 35.2 and 41.6%o,
and from 1.4 to 6.6%o during postmonsoon. Alkalinity during
premonsoon varies from 65.9 - 100.0 meq/l, and 229.4 - 275.5 meq/l during
postmonsoon. The variations in the results are mainly due to the inflow of
seawater during premonsoon and the riverine input during postmonsoon. This
study shows that heavy rainfall, high run-off and the fresh water input
increase the trace metal concentrations in the sediments during postmonsoon,
whereas the decrease during premonsoon is in response to decrease in clay
content, Fe-Mn oxides and organic carbon. Application of arsenical herbicides
in the

river basin area and burning
of coal in the nearby Ennore Thermal Power plant contribute arsenic and cadmium
to this lake sediments.
 
Date 2014-01-15T09:25:29Z
2014-01-15T09:25:29Z
1999-12
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/25704
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.28(4) [December 1999]