Processes of formation and distribution of Pb-, Zn-, Cd-, and Cu-bearing minerals in the Tyne Basin, Northeast England: implications for metal-contaminated river systems
Article Abstract:
A general weathering reaction paragenesis of Pb-, Zn-, Cd- and Cu-bearing minerals is noted in mineralogical analysis of contemporary overbank river sediment, mining-age alluvium and mine-waste tips and of suspended solids in river waters. Sulfides become carbonates in high pH/pCO2, limestone-dominated source terrains. These and other contaminant metal-rich minerals such as silicates and manganese oxyhydroxides decrease and disappear downstream in lower pH shale/sandstone-dominated environments. These chemical weathering and dispersion processes may explain the resultant decline in sediment contents in the Tyne and other metal-contaminated rivers.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
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Heavy metal pollution in the Rhine Basin
Article Abstract:
The Rhine Basin covers 200,000 square kilometers and runs through parts of Switzerland, Germany, France, Luxembourg and the Netherlands. The region is heavily industrialized and as a result, pollution levels are quite high. Heavy metal contamination in the Rhine Basin as a direct result of industrial pollution shows that more attention needs to be given to emissions reduction and strategies which mitigate the impact of pollution on soil and groundwater.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1993
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Noncatalyst and catalyst-equipped automobiles and heavy-duty diesel trucks
Article Abstract:
The determination of tracer compounds by investigating the effect of fine organic particulate exhaust emissions to the Los Angeles atmosphere is discussed. Gas chromatography/mass spectrometry were used in the analysis of the chemical composition of gasoline and diesel powered vehicle exhaust aerosol samples. It was found that fossil petroleum markers, readily identified in the emissions, can be used as suitable tracer compounds.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1993
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