scholarly journals Spatial distribution of heavy metal contaminations in Yowie Bay sediments and their environmental impacts

2015 ◽  
Author(s):  
Y. M. Alyazichi ◽  
B. G. Jones ◽  
E. McLean
Keyword(s):  
Heavy Metal ◽  
Spatial Distribution ◽  
Environmental Impacts

Spatial Distribution of Heavy Metal Ions in Glass Forming Melts: Spectroscopic and Physical-Chemical Study

2008 ◽  
Vol 39-40 ◽  
pp. 41-44 ◽  
Author(s):  
A. Anan’ev ◽  
L. Maksimov
Keyword(s):  
Heavy Metal ◽  
Spatial Distribution ◽  
Metal Ions ◽  
Distribution Coefficient ◽  
Heavy Metal Ions ◽  
Brillouin Scattering ◽  
Chemical Study ◽  
Sodium Borate ◽  
Glass Host ◽  
Glass Forming

Spatial distribution of heavy metal ions (HMI) in inorganic glass forming melts was studied by measuring HMI distribution coefficient between two unmixable melts: sodium-borate glass forming melt and non-glass forming molten sodium sulfate. Combining the data on glass host composition dependence of HMI distribution coefficient with the data of Rayleigh and Mandel’shtam-Brillouin scattering (RMBS) spectroscopy of glasses doped with HMI and undoped ones made it possible to evidence the segregation of HMI into alkali-enriched inhomogeneities of glass hosts and offer the approach to choosing compositions of glass host in which HMI segregation will be minimized.

scholarly journals Life Cycle Assessment of viticultural technical management routes (TMRs): comparison between an organic and an integrated management route

OENO One ◽  
2016 ◽  
Vol 50 (2) ◽  
Author(s):  
Anthony Rouault ◽  
Sandra Beauchet ◽  
Christel Renaud-Gentie ◽  
Frédérique Jourjon
Keyword(s):  
Heavy Metal ◽  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impacts ◽  
Plant Protection ◽  
Resource Depletion ◽  
Impact Categories ◽  
Nitrogen Emissions ◽  
Technical Management ◽  
Lca Results

<p style="text-align: justify;"><strong>Aims</strong>: Using Life Cycle Assessment (LCA), this study aims to compare the environmental impacts of two different viticultural technical management routes (TMRs); integrated and organic) and to identify the operations that contribute the most to the impacts.</p><p style="text-align: justify;"><strong>Methods and results</strong>: LCA impact scores were expressed in two functional units: 1 ha of cultivated area and 1 kg of collected grape. We studied all operations from field preparation before planting to the end-of-life of the vine. Inputs and outputs were transformed into potential environmental impacts thanks to SALCA™ (V1.02) and USETox™ (V1.03) methods. Plant protection treatments were a major cause of impact for both TMRs for fuel-related impact categories. For both TMRs, the main contributors to natural resource depletion and freshwater ecotoxicity were trellis system installation and background heavy metal emissions, respectively.</p><p style="text-align: justify;"><strong>Conclusion</strong>: This study shows that the studied organic TMR has higher impact scores than the integrated TMR for all the chosen impact categories except eutrophication. However, the chosen TMRs are only typical of integrated and organic viticulture in Loire Valley and some emission models (heavy metal, fuel-related emissions, and nitrogen emissions) have to be improved in order to better assess the environmental impacts of viticulture. Soil quality should also be integrated to LCA results in viticulture because this lack may be a disadvantage for organic viticulture.</p><strong>Significance and impact of study</strong>: This study is among the first to compare LCA results of an integrated and an organic TMR.

scholarly journals Spatial distribution of heavy metals in surface sediments of Kalametiya Lagoon in southern Sri Lanka; insight towards pollution status and socio-economic interactions

2021 ◽  
Author(s):  
Sunanda Kodikara ◽  
Hossein Tiemoory ◽  
Mangala Chathura De Silva ◽  
Pathmasiri Ranasinghe ◽  
Sudarshana Somasiri ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Spatial Distribution ◽  
Sri Lanka ◽  
Suspended Sediments ◽  
Potential Effect ◽  
Toxic Heavy Metals ◽  
Threshold Effect Level ◽  
Effect Level ◽  
Economic Interactions

Abstract Heavy metal (HM) pollution has become a serious threat to coastal aquatic ecosystems. This study, therefore, aimed at assessing the spatial distribution of selected heavy metals/metalloids including Arsenic (As), Cadmium (Cd), Chromium (Cr), Lead (Pb), and Mercury (Hg) in surface sediment (0–15 cm) samples collected across Kalametiya Lagoon in southern Sri Lanka. Forty-one (41) grid points of the lagoon were sampled and the sediment samples were analyzed for HM content by using ICP-MS. A questionnaire survey was carried out to investigate the possible sources for HM pollution in Kalametiya Lagoon. Water pH and salinity showed significant variation across the lagoon. Overall mean value of pH and salinity were 6.68 ± 0.17 and 2.9 ± 2.2 PSU respectively. The spatial distribution of the heavy metals was not monotonic and showed a highly spatial variation. The kernel density maps of the measured heavy metals demarcated several different areas of the lagoon. The mean contents of As, Cd, Cr, Hg, and Pb were lower than that of threshold effect level (TEL) however, higher for Hg at the North Inlet. Nevertheless, it was still lower than potential effect level (PEL). Socio-economic interactions have dramatically reduced during the past two decades. Industrial sewage, river suspended sediments and agrochemicals such as fertilizers, pesticides were reportedly identified as the possible sources for heavy metal loads. Accumulation of toxic heavy metals can be minimized by detouring the water inflow to the lagoon.

Spatial distribution and the extent of heavy metal and hexavalent chromium pollution in agricultural soils from Jajmau, India

2014 ◽  
Vol 73 (7) ◽  
pp. 3565-3577 ◽  
Author(s):  
Debajyoti Paul ◽  
Bharat Choudhary ◽  
Tarun Gupta ◽  
Melbin Thomas Jose
Keyword(s):  
Heavy Metal ◽  
Spatial Distribution ◽  
Hexavalent Chromium ◽  
Agricultural Soils

scholarly journals Heavy metal and PCB spatial distribution pattern in sediments within an urban catchment—contribution of historical pollution sources

2016 ◽  
Vol 16 (11) ◽  
pp. 2594-2605 ◽  
Author(s):  
Celia Dias-Ferreira ◽  
Rosinda L. Pato ◽  
Jorge B. Varejão ◽  
Alexandre O. Tavares ◽  
Antonio J. D. Ferreira
Keyword(s):  
Heavy Metal ◽  
Spatial Distribution ◽  
Distribution Pattern ◽  
Pollution Sources ◽  
Spatial Distribution Pattern ◽  
Urban Catchment

scholarly journals Spatial distribution and source identification of heavy metal pollution in roadside surface soil: a study of Dhaka Aricha highway, Bangladesh

2016 ◽  
Vol 5 (1) ◽  
Author(s):  
Fahad Ahmed ◽  
A. N. M. Fakhruddin ◽  
M. D. Toufick Imam ◽  
Nasima Khan ◽  
Tanzir Ahmed Khan ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Spatial Distribution ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Source Identification ◽  
Surface Soil
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