Record Details

Effect of mining rejects on the nutrient chemistry of Mandovi Estuary, Goa

DRS at CSIR-National Institute of Oceanography

View Archive Info
 
 
Field Value
 
Title Effect of mining rejects on the nutrient chemistry of Mandovi Estuary, Goa
 
Creator DeSousa, S.N.
 
Subject water analysis
nutrients (mineral)
nitrates
phosphates
silicates
mine tailings
resuspended sediments
adsorption
chemical oceanography
pollution effects
 
Description Nutrient chemistry in Mandovi Estuary, Goa, India during premonsoon in affected by the discharge of mining rejects. Concentrations of nitrate and phosphate, in general, show low levels in this season (nitate 0.3-3.3 mu M, phosphate 0.11-0.56 mu M) while silicate show wide range in concentration (1.25-130 mu M). Elevated concentrations of nitrate (6.1-9.1 mu M) associated with reduced levels of phosphate (less than 0.1 mu M) and silicate (50-60 mu M) in the mid-estuary, near the discharge point of mining rejects, suggest that the suspended sediments derived from the mining rejects adsorb phosphate and silicate, and remove them from the water column while the mining rejects act as a source of nitrate to the estuary. Large quantities (10 tonnes/month) of ammonium nitrate used in explosives for blasting the hard rock at the mining site seem to be the source of the source of nitrate in mining rejects.
 
Date 2009-01-10T10:07:04Z
2009-01-10T10:07:04Z
1999
 
Type Journal Article
 
Identifier Indian Journal of Marine Sciences, Vol.28; 355-359p.
http://drs.nio.org/drs/handle/2264/1734
 
Language en
 
Rights Copyright [1999]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher Council of Scientific and Industrial Research, New Delhi