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Arsenic contamination, consequences and remediation ...

1. Introduction. Recently, the environmental fate and behavior of arsenic (As) is receiving increased attention due to the arsenic (As) pollution in South-East Asia.

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(An English-Chinese-Japanese Dictionary …

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Coltan - Wikipedia

Coltan (short for columbite–tantalites and known industrially as tantalite) is a dull black metallic ore, from which the elements niobium and tantalum are extracted. The niobium-dominant mineral in coltan is columbite (after niobium's original American name columbium), and the tantalum-dominant mineral is tantalite.

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rock | Definition, Characteristics, & Types | Britannica

Rock: Rock, in geology, naturally occurring coherent aggregate of one or more minerals that constitutes the basic unit of which the solid Earth consists.

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A review of the beneficiation of rare earth element ...

Rare earth elements (REEs) comprise the fifteen elements of the lanthanide series as well as yttrium, and may be found in over 250 different minerals.

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