Please get original studies from Sweta and share as pdf files on this group.
On Sat, Jun 29, 2019 at 12:26 PM samir umarye <samir.uma...@gmail.com> wrote: > SHWETA KAMAT > shw...@herald-goa.com > Finds Bicholim river to be strongly polluted, while Mandovi to be > moderately polluted > > PANJIM: Iron ore mining activities have had a considerable impact on the > Bicholim and Mandovi river sediments, which in turn affect the ecology of > bottom-dwelling organism. Mining activities, which are under suspension for > the last 15 months, can also influence the concentration of metals in the > Zuari estuary. > > This was revealed in a study conducted by Cynthia Gaonkar and Vishnu Matta > of the department of Marine Science of Goa University. > > In a two different studies conducted, they have assessed the impact of > past iron ore mining on the sediment cores of rivers of Goa, and impact of > mining on metal concentration in waters of the Zuari estuary. > > In the first study, which has been published in the ‘Research Journal of > Environmental and Earth Sciences’, the researchers said that to assess the > long-term contamination history of pollutants due to intense mining > activities in the adjoining areas of rivers of northern Goa, sediment core > samples were collected from three rivers, Bicholim, Mandovi and Tiracol. > > The sediments were analysed for texture, Organic Carbon (OC), major > elements (Fe, Al, Ca and Mg) and trace metals (Mn, Cu, Zn, Pb, Ni and Cr). > “Depositional environment of the cores was assessed based on the colour and > the distribution of OC. Environmental parameters such as contamination > factor, geo accumulation, enrichment factor and pollution load index were > used to assess the extent of pollution,” the study mentioned. > > In addition, correlation coefficients were calculated to understand their > relationships among the major elements and trace metals and their sources. > “The study revealed that the Bicholim river is strongly polluted with iron > and manganese (Fe & Mn) and moderately polluted with lead (Pb) and Chromium > (Cr),” the study revealed. > > “Whereas, the Mandovi river is moderately polluted with Mn and Pb. On the > other hand, Tiracol River (though unpolluted in the past) is getting > polluted with Copper (Cu) and Cr during recent years because of human > interference,” it added. > > “The results indicate that mining has a considerable impact on the > Bicholim and Mandovi river sediments which in turn affect the ecology of > bottom-dwelling organisms,” the study concluded. > > As far as the Zuari estuary is concerned, the study exemplified that > concentrations of trace metals in waters of the Zuari estuary were > significantly less when compared to the periods of rampant mining activity > around Goa, indicating that mining can influence the concentration of > metals in the Zuari estuary. > > -- > You received this message because you are subscribed to the Google Groups > "Bicholim Goa" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to bicholim+unsubscr...@googlegroups.com. > To post to this group, send email to bicho...@googlegroups.com. > Visit this group at https://groups.google.com/group/bicholim. > To view this discussion on the web visit > https://groups.google.com/d/msgid/bicholim/CAJ9%2BTxmORrwWQOXyROTJE0V5DuCkEbU-uEfgaP27PrwvOc1hmw%40mail.gmail.com > <https://groups.google.com/d/msgid/bicholim/CAJ9%2BTxmORrwWQOXyROTJE0V5DuCkEbU-uEfgaP27PrwvOc1hmw%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. >