A review of tungsten: from environmental obscurity to scrutiny.

Journal of hazardous materials (2005-12-14)
A Koutsospyros, W Braida, C Christodoulatos, D Dermatas, N Strigul
RESUMO

Since its discovery, tungsten, a transition element of Group VIb of the Periodic Table of Elements, and its compounds have been considered environmentally benign. Its presence in biological and drinking water samples in Fallon, Nevada, an acute lymphocytic leukemia cluster struck community has alarmed public health, environmental and regulatory agencies. Tungsten, a metal of extraordinary properties that make it hardly substitutable, is considered an essential commodity with a wide variety of uses stretching from household necessities to highly specialized applications. This work is undertaken in order to explore aspects of environmental behavior of tungsten and its compounds. Occurrence data in terrestrial, atmospheric, aquatic and biotic systems are presented. Various aspects of environmental chemistry, fate transport across environmental interfaces and toxicology are discussed with the objective of identifying knowledge gaps and outlining directions for future research.

MATERIAIS
Número do produto
Marca
Descrição do produto

Sigma-Aldrich
Tungsten, powder, 12 μm, 99.9% trace metals basis
Sigma-Aldrich
Tungsten, wire, diam. 0.25 mm, ≥99.9% trace metals basis
Sigma-Aldrich
Tungsten, foil, thickness 0.05 mm, ≥99.9% trace metals basis
Sigma-Aldrich
Tungsten, wire, diam. 1.0 mm, 99.99% trace metals basis
Sigma-Aldrich
Tungsten, wire, diam. 0.5 mm, ≥99.9% trace metals basis
Sigma-Aldrich
Tungsten, foil, thickness 0.127 mm, ≥99.9% trace metals basis
Sigma-Aldrich
Tungsten, foil, thickness 0.25 mm, ≥99.9% trace metals basis
Tungsten, rod, 100mm, diameter 6.35mm, centerless ground, 99.95%
Sigma-Aldrich
Tungsten, foil, thickness 0.5 mm, ≥99.9% trace metals basis
Tungsten, wire reel, 25m, diameter 0.1mm, clean, 99.95%
Tungsten, wire reel, 5m, diameter 0.005mm, gold plated, 99.95%
Tungsten, wire reel, 25m, diameter 0.025mm, clean, 99.95%
Tungsten, wire reel, 10m, diameter 0.3mm, clean, 99.95%
Tungsten, wire, straight, 300mm, diameter 0.10mm, 99.9+%
Tungsten, wire, straight, 300mm, diameter 0.075mm, 99.9+%
Tungsten, wire reel, 100m, diameter 0.025mm, clean, 99.95%
Tungsten, insulated wire, 2m, conductor diameter 0.025mm, insulation thickness 0.005mm, polyimide insulation, 99.9%
Tungsten, wire reel, 1m, diameter 0.125mm, gold plated, 99.95%
Tungsten, wire reel, 10m, diameter 0.035mm, clean, 99.95%
Tungsten, wire reel, 10m, diameter 0.025mm, clean, 99.95%
Tungsten, foil, 100x100mm, thickness 0.125mm, as rolled, 99.95%
Tungsten, foil, 100x100mm, thickness 0.15mm, as rolled, 99.95%
Tungsten, foil, 100x100mm, thickness 0.1mm, as rolled, 99.95%
Tungsten, foil, 100x100mm, thickness 0.2mm, as rolled, 99.95%
Tungsten, foil, 100x100mm, thickness 0.3mm, as rolled, 99.95%
Tungsten, foil, 100x100mm, thickness 0.5mm, as rolled, 99.95%
Tungsten, foil, 100x100mm, thickness 1.0mm, as rolled, 99.95%
Tungsten, foil, 100x100mm, thickness 2.0mm, as rolled, 99.95%
Tungsten, foil, 150x150mm, thickness 0.125mm, as rolled, 99.95%
Tungsten, foil, 150x150mm, thickness 0.15mm, as rolled, 99.95%

Redes sociais

LinkedIn icon
Twitter icon
Facebook Icon
Instagram Icon

Merck

Pesquisa. Desenvolvimento. Produção.

Somos um fornecedor global líder para o setor de ciências biológicas, com soluções e serviços para pesquisa, desenvolvimento e produção de biotecnologia, além de produção e desenvolvimento de terapias farmacológicas com medicamentos.

© 2021 Merck KGaA, Darmstadt, Alemanha e/ou suas filiais. Todos os direitos reservados.

A reprodução não autorizada de quaisquer materiais deste site é estritamente proibida.