Ecological tolerance and niche structure of Sphagnum along a pollution gradient near Sudbury, Ontario, Canada

1987 ◽  
Vol 65 (6) ◽  
pp. 1268-1274 ◽  
Author(s):  
L. Dennis Gignac
Keyword(s):  
Significant Relationship ◽  
Metal Content ◽  
Pollution Source ◽  
Pollution Gradient ◽  
High Metal ◽  
Sphagnum Riparium ◽  
Sphagnum Magellanicum ◽  
Humified Peat

Accumulations of Cu and Ni were measured in four Sphagnum species occupying overlapping niches at varying distances from the smelter at Falconbridge, Ont. A distinct relationship existed between the metal content of Sphagnum russowii and the reciprocal of the distance from the pollution source. Accumulations of Cu and Ni in the partially humidified peat subtending the living Sphagnum were significantly higher than the concentrations retained in the moss plants, particularly on sites having high metal loadings. Concentrations of Cu and Ni were not significantly different between species occupying overlapping height and pH zonations. There existed a significant relationship between metal accumulations in the capitula of Sphagnum russowii, Sphagnum magellanicum, and Sphagnum riparium and the partially humified peat below the living moss.

Preparation and characterization of high metal content Pt–Ru alloy catalysts on various carbon blacks for DMFCs

2006 ◽  
Vol 52 (4) ◽  
pp. 1697-1702 ◽  
Author(s):  
Kookil Han ◽  
Jaeseung Lee ◽  
Hasuck Kim
Keyword(s):  
Metal Content ◽  
Carbon Blacks ◽  
High Metal Content ◽  
High Metal ◽  
Alloy Catalysts

II. Industrial Metal Fallout Pattern From Lichen And Soil Assays

1981 ◽  
Vol 13 (3) ◽  
pp. 289-300 ◽  
Author(s):  
R. Goyal ◽  
M. R. D. Seaward
Keyword(s):  
Surface Topography ◽  
Metal Content ◽  
Inverse Relationship ◽  
Soil Surface ◽  
Pollution Source ◽  
Air Samples ◽  
Fe And Mn ◽  
Terricolous Lichens ◽  
Vegetation Samples

AbstractThe value of terricolous lichens as bioindicators of industrial metal fallout patterns is investigated; the widely-known inverse relationship between the metal content of lichens, as well as their associated soils, and the distance from the pollution source was found to be affected by microclimatic factors dependent upon soil surface topography and the local vegetation. Samples of lichen vegetation and their associated soils from Risby Warren, North Lincolnshire, were analysed for Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn. Enhanced concentrations of Fe and Mn in the lichen, soil and air samples were indicative of their emission from the nearby Scunthorpe steelworks. The highest concentrations of all metals analysed were found to be in the top layer (0-5 cm) of the soils.

Demetallization of Heavy Oils of High Metal Content through Pyrolysis under Supercritical Water Environment

2020 ◽  
Vol 34 (3) ◽  
pp. 2861-2869 ◽  
Author(s):  
Xu-Quan Tang ◽  
Jing-Cao Pu ◽  
Hong-Bing Zheng ◽  
Xu-De Yu ◽  
Xue-Feng Chen ◽  
...  
Keyword(s):  
Supercritical Water ◽  
Metal Content ◽  
Water Environment ◽  
Heavy Oils ◽  
High Metal Content ◽  
High Metal

scholarly journals The Influence of Air Pollution on Corticolous Lichens near the Strathcona Industrial Area, Alberta

2007 ◽  
Vol 121 (1) ◽  
pp. 17 ◽  
Author(s):  
M. Elsinger ◽  
E. Burrell ◽  
N. DeBruyn ◽  
K. Tanasichuk ◽  
K. Timoney
Keyword(s):  
Air Pollution ◽  
Species Richness ◽  
Air Quality ◽  
Species Composition ◽  
Industrial Area ◽  
Pollution Source ◽  
Pollution Gradient ◽  
Mature Trees ◽  
Parmelia Sulcata ◽  
Lichen Community

Lichens that grow on the bark of mature trees were studied at 35 sites along an air pollution gradient east of Edmonton, Alberta. Data on species composition, richness, and cover were recorded in October 1999 in a matrix of sites that extends from a known source of pollutants (the Strathcona Industrial Area) east across Strathcona County. Air pollution is affecting the corticolous lichen community. Lichen species richness and total cover increased with distance from the pollution source. Species richness in areas distant from pollution was roughly twice that in areas near the Strathcona Industrial Area. Xanthoria fallax and Phaeophyscia orbicularis were the most pollution tolerant lichens. Xanthoria hasseana, Ochrolechia arborea, Physcia adscendens, Parmelia sulcata, and Melanelia albertana were rare or absent near the pollution source and common in more distant areas. Most of the 15 species assessed were sensitive to air quality to some degree. Some lichens near the refineries and in Sherwood Park showed abnormal coloration and poor thallus integrity indicative of stress. We discuss implications for human health.

scholarly journals Life-history strategies in zooplankton promote coexistence of competitors in extreme environments with high metal content

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Adriana Aránguiz-Acuña ◽  
Pablo Pérez-Portilla ◽  
Ana De la Fuente ◽  
Diego Fontaneto
Keyword(s):  
Life History ◽  
Metal Content ◽  
Extreme Environments ◽  
Life History Strategies ◽  
High Metal Content ◽  
High Metal

Preparation of high metal content nanoporous carbon

2013 ◽  
Vol 115 ◽  
pp. 115-121 ◽  
Author(s):  
Miguel Molina-Sabio ◽  
Mateus Carvalho Monteiro de Castro ◽  
Manuel Martinez-Escandell ◽  
Francisco Rodríguez-Reinoso
Keyword(s):  
Metal Content ◽  
Nanoporous Carbon ◽  
High Metal Content ◽  
High Metal

scholarly journals Hydrocracking of Calophyllum inophyllum Oil Employing Co and/or Mo Supported on γ-Al2O3 for Biofuel Production

2020 ◽  
Vol 15 (3) ◽  
pp. 743-751
Author(s):  
Wega Trisunaryanti ◽  
Triyono Triyono ◽  
Mohammad Ali Ghoni ◽  
Dyah Ayu Fatmawati ◽  
Puspa Nindro Mahayuwati ◽  
...  
Keyword(s):  
Bimetallic Catalysts ◽  
Metal Content ◽  
Liquid Fraction ◽  
Catalytic Performance ◽  
Biofuel Production ◽  
Food Crop ◽  
Wet Impregnation ◽  
Calophyllum Inophyllum ◽  
High Metal ◽  
Calophyllum Inophyllum Oil

Cobalt and/or Molybdenum based catalysts were simply dispersed on γ-Al2O3 through wet impregnation. The set of prepared monometallic and bimetallic catalysts of aCoO/γ-Al2O3, aMoO/γ-Al2O3, aCoOaMoO/γ-Al2O3, and bCoObMoO/γ-Al2O3 were investigated and evaluated in the hydrocracking of Calophyllum inophyllum (CIO) which is not a food crop as well as rich in unsaturated fatty acid that potential to be converted into biofuel. Out of the prepared catalysts, aCoOaMoO/γ-Al2O3 with total   metal content, acidity, and specific surface area of 13.62 wt%, 5.01 mmol.g-1, and 107.67 m2.g-1, respectively, showed the best catalytic performance. The high metal loading of aCoOaMoO/γ-Al2O3 is favorable by producing 65.56 wt% liquid fraction through carbocation formation mechanism. It was selective to produce 8.61 wt% gasoline and 5.01 wt% diesel. Copyright © 2020 BCREC Group. All rights reserved 

scholarly journals Ground-living arthropods along pollution gradient in boreal pine forest

1995 ◽  
Vol 6 (2-3) ◽  
pp. 127-131 ◽  
Author(s):  
Seppo Koponen ◽  
Pekka Niemelä
Keyword(s):  
Species Composition ◽  
Pollution Source ◽  
Pine Forest ◽  
Polluted Site ◽  
The Other ◽  
Ground Vegetation ◽  
Pollution Gradient ◽  
Wolf Spiders

We studied the occurrence of arthropods in a polluted pine forest at Harjavalta, southwestern Finland. Significantly fewer beetles (Coleoptera) were trapped near (0.5 km) a smelter and fertilizer factory than at sites further away (3, 5, 9 km). No differences in total numbers (inds./trap) along the distance (pollution) gradient were found for spiders (Araneae), ants (Hymenoptera: Formicidae) or bugs (Heteroptera). Marked differences were observed in diversity and species composition of the studied groups between the most polluted site (0.5 km) and the other sites (3, 5, 9 km). There were permanent arthropod populations (e.g. ants and wolf spiders) living at the most polluted site. Differences in ground-living fauna were explained by changes in ground vegetation due to pollution. The contents of Cu, Fe, Ni and Cr in ants and wolf spiders were clearly highest near the pollution source; those of Cd, Zn and Al were high at all sites.

Sea sediments contaminated with heavy metals: metal speciation and removal

1995 ◽  
Vol 32 (9-10) ◽  
pp. 65-73 ◽  
Author(s):  
C. Savvides ◽  
A. Papadopoulos ◽  
K. J. Haralambous ◽  
M. Loizidou
Keyword(s):  
Heavy Metals ◽  
Industrial Waste ◽  
Metal Content ◽  
Metal Speciation ◽  
Acid Solutions ◽  
Significant Percentage ◽  
High Metal Content ◽  
Residual Phase ◽  
High Metal ◽  
Partitioning Procedure

The contamination of sediments with heavy metals may lead to serious environmental problems and in some cases action has to take place for their decontamination. In this work, studies were performed on sediments near the outfall of domestic and industrial waste. The metals examined were Cu, Cr, Ni, Pb, Zn and Fe. Indeed, high metal content was found in the sediments and the contamination factors were quite high, indicating the effect of the nearby discharge of effluents. The results of the application of a sequential extraction partitioning procedure indicated that an important part of the metal content is carried by the residual phase but also a significant percentage is found in the organic and reducible fractions, i.e. in potentially available fractions. Batch extraction experiments using acid solutions of various concentrations and different acid-sediment contact times were performed in order to remove heavy metals from the sediments. For most metals studied, a satisfactory percentage was extracted at low contact times.

scholarly journals High Metal Content of Highly Accreting Quasars

2021 ◽  
Vol 910 (2) ◽  
pp. 115
Author(s):  
Marzena Śniegowska ◽  
Paola Marziani ◽  
Bożena Czerny ◽  
Swayamtrupta Panda ◽  
Mary Loli Martínez-Aldama ◽  
...  
Keyword(s):  
Metal Content ◽  
High Metal Content ◽  
High Metal
Sign in / Sign up

Export Citation Format

Share Document