Seasonal distribution of trace metals in suspended particulate and bottom sediments of four microtidal river estuaries, west coast of India

LL Fernandes, PM Kessarkar, VP Rao… - Hydrological …, 2019 - Taylor & Francis
LL Fernandes, PM Kessarkar, VP Rao, S Suja, G Parthiban, S Kurian
Hydrological Sciences Journal, 2019Taylor & Francis
The seasonal distribution of metals (V, Cr, Co, Cu, Ni, Zn, Pb, Mn, Fe, Al and Ti) in
suspended and bottom sediments of four minor estuaries (Terekhol, Chapora, Sal and
Talpona rivers) of Goa, India was investigated to understand the metal distribution process
in the estuarine region. The highest particulate-metal concentrations were found in low-
salinity regions of all the estuaries, in the wet season (eg in the Terekhol River, the averages
in ppm were Co: 53, Ni: 197, Cu: 208, Zn: 212 and Pb: 65) compared to the dry season …
Abstract
The seasonal distribution of metals (V, Cr, Co, Cu, Ni, Zn, Pb, Mn, Fe, Al and Ti) in suspended and bottom sediments of four minor estuaries (Terekhol, Chapora, Sal and Talpona rivers) of Goa, India was investigated to understand the metal distribution process in the estuarine region. The highest particulate-metal concentrations were found in low-salinity regions of all the estuaries, in the wet season (e.g. in the Terekhol River, the averages in ppm were Co: 53, Ni: 197, Cu: 208, Zn: 212 and Pb: 65) compared to the dry season averages (Co: 27, Ni: 76, Cu: 105, Zn: 164 and Pb: 13 ppm). The estuarine-mixing diagrams showed non-conservative behaviour in both seasons. The Sal River had the highest particulate-metal concentration (Co: 106, Ni: 300 and Zn: 323 ppm), suggesting an anthropogenic input. The enrichment factor for suspended matter was higher than bottom sediments with extremely high enrichment for Mn (>10). The Geo-accumulation index displayed unpolluted to polluted class for all metals. The study highlights the important role played by small estuaries in seasonal metal release and accumulation along the coastal region.
Taylor & Francis Online
以上显示的是最相近的搜索结果。 查看全部搜索结果