Author: Maryanne Mognoni
Publisher:
ISBN:
Category :
Languages : en
Pages : 28
Book Description
Determination of the Types and Concentration of Selected Heavy Metals in the Sediments of the Hackensack River as a Possible Source of Pollution
Selected Heavy Metals in Sediments and Biota from Desert Streams of the Gila River Drainage (Arizona)
Author: MA. Lewis
Publisher:
ISBN:
Category : Aquatic animals
Languages : en
Pages : 14
Book Description
The distribution and bioaccumulation of heavy metals in mine-polluted and nonpolluted desert streams was studied during 1975 and 1976. Heavy metal concentrations in reference streams were less than the detection limits; however, periodic input of mining and milling wastes increased the zinc, copper, manganese, and iron in receiving test streams to above this level. Copper and, to a lesser extent, managanese concentrations were higher in samples of sediment and biota collected from contaminated waters (P 0.05). The copper concentration was twelve times higher in biota collected from metal-contaminated waters than an identical species collected from reference areas. Fish viscera, fish eggs, and eviscerated fish in mine-impacted streams also contained a higher copper content. In contrast, concentrations of iron, cadmium, lead, and mercury were similar in all samples. The distributions of copper, manganese, and iron in the trophic levels were similar; consumer organisms concentrated less metal than did the sediments of primary producers. An exception was zinc, which achieved its highest concentration in the middle trophic levels. Higher copper levels in fish tissue did not effect length-weight relationships or condition values (P 0.05).
Publisher:
ISBN:
Category : Aquatic animals
Languages : en
Pages : 14
Book Description
The distribution and bioaccumulation of heavy metals in mine-polluted and nonpolluted desert streams was studied during 1975 and 1976. Heavy metal concentrations in reference streams were less than the detection limits; however, periodic input of mining and milling wastes increased the zinc, copper, manganese, and iron in receiving test streams to above this level. Copper and, to a lesser extent, managanese concentrations were higher in samples of sediment and biota collected from contaminated waters (P 0.05). The copper concentration was twelve times higher in biota collected from metal-contaminated waters than an identical species collected from reference areas. Fish viscera, fish eggs, and eviscerated fish in mine-impacted streams also contained a higher copper content. In contrast, concentrations of iron, cadmium, lead, and mercury were similar in all samples. The distributions of copper, manganese, and iron in the trophic levels were similar; consumer organisms concentrated less metal than did the sediments of primary producers. An exception was zinc, which achieved its highest concentration in the middle trophic levels. Higher copper levels in fish tissue did not effect length-weight relationships or condition values (P 0.05).
Determination of Heavy Metals on the Rock River Through the Analysis of Sediments
Author: Sheldon Landsberger
Publisher:
ISBN:
Category : Heavy metals
Languages : en
Pages : 56
Book Description
Publisher:
ISBN:
Category : Heavy metals
Languages : en
Pages : 56
Book Description
Heavy Metals in Water (excluding Mercury)
Author: Water Resources Scientific Information Center
Publisher:
ISBN:
Category : Metals
Languages : en
Pages : 368
Book Description
Publisher:
ISBN:
Category : Metals
Languages : en
Pages : 368
Book Description
Heavy Metals in Water (excluding Mercury)
Author: Water Resources Scientific Information Center
Publisher:
ISBN:
Category : Heavy metals
Languages : en
Pages : 378
Book Description
Publisher:
ISBN:
Category : Heavy metals
Languages : en
Pages : 378
Book Description
Selected Water Resources Abstracts
Pollution Abstracts
Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods
Heavy Metal Contamination At The Barekese Reservoir
Author: Eugenia Kromo Sarpong
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659425721
Category :
Languages : en
Pages : 108
Book Description
In this study, the concentrations of five heavy metals (Pb, Zn, Mn, Cu and Fe) were determined in raw water, sediments and in aquatic macrophytes from selected sites at the Barekese reservoir in Ghana between the periods of June 2011 and January 2012. The obtained results showed that the mean concentration ranges for lead (0.04-0.25 mg/L) and iron (0.49-0.89 mg/L) in the reservoir water exceeded the WHO guideline values of 0.01mg/L and 0.30mg/L respectively for drinking water. The reservoir water was thus concluded as unfit for drinking except after adequate treatment. Comparison of the levels of heavy metals in sediments with the Numerical Sediment Quality Guidelines values showed the sediments as heavily polluted with lead and copper at certain sites of the reservoir. Good information were also provided by analysis of whole plants and organs of passive aquatic macrophytes (Typha domingensis, Ceratophyllum demersum, Pistia stratiotes and Lemna paucicostata). Metals in the plant species were higher in roots than shoots. The mean heavy metal concentrations in all the water, sediments and macrophytes were observed in the sequence; Fe > Cu > Mn > Pb > Zn.
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659425721
Category :
Languages : en
Pages : 108
Book Description
In this study, the concentrations of five heavy metals (Pb, Zn, Mn, Cu and Fe) were determined in raw water, sediments and in aquatic macrophytes from selected sites at the Barekese reservoir in Ghana between the periods of June 2011 and January 2012. The obtained results showed that the mean concentration ranges for lead (0.04-0.25 mg/L) and iron (0.49-0.89 mg/L) in the reservoir water exceeded the WHO guideline values of 0.01mg/L and 0.30mg/L respectively for drinking water. The reservoir water was thus concluded as unfit for drinking except after adequate treatment. Comparison of the levels of heavy metals in sediments with the Numerical Sediment Quality Guidelines values showed the sediments as heavily polluted with lead and copper at certain sites of the reservoir. Good information were also provided by analysis of whole plants and organs of passive aquatic macrophytes (Typha domingensis, Ceratophyllum demersum, Pistia stratiotes and Lemna paucicostata). Metals in the plant species were higher in roots than shoots. The mean heavy metal concentrations in all the water, sediments and macrophytes were observed in the sequence; Fe > Cu > Mn > Pb > Zn.
Heavy Metals In The Environment
Author: International Conference on Heavy Metals in the Environment
Publisher:
ISBN:
Category :
Languages : en
Pages : 630
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 630
Book Description