Source and distribution of trace metals and nutrients in Narmada and Tapti river basins, India

Abstract

The study was designed to establish the distributions of trace metals, dissolved organic carbon, and inorganic nutrients as well as to assess the extent of anthropogenic inputs into the Narmada and Tapti rivers. Water and sediment qualities are variable in the rivers, and there are major pollution problems at certain locations, mainly associated with urban and industrial centers. The metal concentrations of samples of the aquatic compartments investigated were close to the maximum permissible concentration for the survival of aquatic life, except for higher values of Cu (5-763 lg l -1 ), Pb (24-376 lg l -1 ), Zn (24-730 lg l -1 ), and Cr (70-740 lg l -1 ) and for drinking water except for elevated concentrations of metals such as Pb, Fe (850-2,060 lg l -1 ), Cr, and Ni (20-120 lg l -1 ). In general, the concentrations of trace metals in the rivers vary down stream which may affect the ''health'' of the aquatic ecosystem and may also affect the health of the rural community that depends on the untreated river water directly for domestic use. The assessment of EF, I geo , and PLI in the sediments reveals overall moderate pollution in the river basins.

Hydrochemistry and nutrients dynamic in the Suquía River urban catchment’s, Córdoba, Argentina

“…This fact could indicate an exceptional urban or industrial wastewater. TP and PO 4 3-concentrations in La Cañada brook are also higher than in the Suquía River mean stream, which can be attributed to domestic wastewaters, particularly those containing detergents (Sharma and Subramanian 2010).…”

“…In a recent work, Kaushal et al (2010) have also pointed out the significance of the land use in the increase of contaminant loads in streams and rivers. Good examples of this are the recent studies of Juahir et al (2010), Koklu et al (2010), and Sharma and Subramanian (2010).…”

Multivariate statistical evaluation of heavy metals in the surface water sources of Jia Bharali river basin, North Brahmaputra plain, India

“…These elements are most often found in crustal components (Zelenka et al 1994;Atgin 2000;Kumar et al 2001) and hence PC 2 may be ascribed as geogenic factor influencing the trace metal distribution in the surfacewater sources. The negative loadings of Fe and Mn in the monsoon season has been attributed to the dilution effect of the high rainfall in the basin and consequent increased flow of water into the surface water sources (Sharma and Subramanian 2010). PC 3 showing *14 % of the total variance in both the season loads high positive scores of Cu, Ni, Pb, Zn in the wet season while As, Cd, Fe, Pb and Zn in the dry season.…”

Distribution, Risk Assessment, and Source Identification of Heavy Metals in Surface Sediments of River Soan, Pakistan

“…Though natural processes also added heavy metals to the aquatic systems however, ecological risks are often accompanied by anthropogenic processes. Heavy metals have the potential to cause serious ecological risk through bioaccumulation and contamination of food chain .…”

“…Several factors affect the mobility of metals in sediments. Changing environmental conditions such as pH, redox potential, or the presence of organic chelators in the system may render the remobilization of metals from sediments . It is thus needed to assess the degree of contamination in sediments and to analyze the biological significance of these contaminants for the evaluation of the ecosystem health rather than simple comparison .…”