Abstract：
:Mine tailing from the El Teniente-Codelco copper mine situated in VI Region of Chile was analysed in order to evaluate the mobility and speciation of copper in the solid material. Mine tailing was sampled after the rougher flotation circuits, and the copper content was measured to 1150 mg kg (-1) dry matter. This tailing was segmented into fractions of different size intervals: 0-38, 38-45, 45-53, 53-75, 75-106, 106-150, 150-212, and >212 microm, respectively. Copper content determination, sequential chemical extraction, and desorption experiments were carried out for each size interval in order to evaluate the speciation of copper. It was found that the particles of smallest size contained 50-60% weak acid leachable copper, whereas only 32% of the copper found in largest particles could be leached in weak acid. Copper oxides and carbonates were the dominating species in the smaller particles, and the larger particles contained considerable amounts of sulphides.
journal_name
Chemospherejournal_title
Chemosphereauthors
Hansen HK,Yianatos JB,Ottosen LMdoi
10.1016/j.chemosphere.2005.01.086subject
Has Abstractpub_date
2005-09-01 00:00:00pages
1497-503issue
10eissn
0045-6535issn
1879-1298pii
S0045-6535(05)00240-7journal_volume
60pub_type
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