Zinc speciation in a contaminated aquatic environment: characterization of environmental particles by analytical electron microscopy

Article Abstract:

Researchers from the U.S. and Canada used analytical electron microscopy to study the characteristics of aquatic particles contaminated by zinc smelting operations in Lake DePue, northern Illinois.

Electron & Proton Microscopes, Product information, Environmental aspects, Zinc industry

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Sources and fluxes of mercury in the St. Lawrence River

Article Abstract:

The St. Lawrence waterway and its tributaries were sampled to determine the levels of dissolved and particulate mercury. Compounding the difficulty in performing such sampling is the diverse topography and usage of the land. Also impacting the sampling was that large regions were frozen for months at a time. High-frequency samplings were taken over 18 months between 1995 and 1996. Effluent from Montreal was also sampled. The resulting information showed that dissolved mercury was mainly found in north shore tributaries. Particulate mercury was mainly from erosion of river bands and beds. The data suggests that at least 88 percent of deposited mercury was retained in the watersheds. The authors of this report postulate that this study might be an experimental model that could be used for other large riverine systems of sub-boreal and cold-temperature regions.

Canada, Pollutants produced & recycled, Mercury, Mercury (Metal), Mercury industry, Saint Lawrence Seaway

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Sedimentation Field-Flow Fractionation Coupled Online to Inductively Coupled Plasma Mass spectrometry - New possibilities for Studies of Trace Metal Adsorption onto Natural Colloids

Article Abstract:

Researchers in Sweden and Australia showed the efficacy of using field-flow fractionation for detecting major elements (aluminum, silicon, iron, and manganese) and trace elements (cesium, cadmium, copper, lead, and zinc) within a a clay-water suspension.

Australia, Sweden, Lead, All Other Basic Inorganic Chemical Manufacturing, Primary aluminum, Aluminum, Primary Aluminum Production, Primary copper, Copper, Primary Smelting and Refining of Copper, Industrial inorganic chemicals, not elsewhere classified, Manganese, Iron Compounds NEC, Cadmium, Cesium, Analytical Instruments, Silicon, Lead products, Manganese (Metal), Aluminum (Metal), Aluminum industry, Aluminum products, Copper products, Iron, Iron (Metal), Zinc, Zinc (Metal), Iron compounds

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