Enargite oxidative dissolution: Preliminary data of flow-through experiments

被引：0

作者：

Musu, E. ^{[1
]}

Da Pelo, S. ^{[2
]}

Lattanzi, P. ^{[2
]}

机构：

[1] Pixina Manna, Sardegna Ric, Pula, CA, Italy

[2] Univ Cagliari, Dipartimento Sci Terra, Cagliari, Italy

来源：

WATER-ROCK INTERACTION (WRI-13) | 2010年

关键词：

KINETICS; MEDIA;

D O I：

暂无

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

The oxidative dissolution of enargite, Cu3AsS4, was studied in a flow-through experiment at pH 1 and 4. Preliminary data indicate, at both pH, a moderate rate of dissolution (in the order of 10(-10) to 10(-9) mol.m(-2) s(-1)), with a faster release of Cu with respect to As. This behaviour may partly explain the high Cu/As ratios typical of waters draining enargite-rich deposits. The estimated activation energies depend on "reaction histories", being lower (35 +/- 8 to 48 +/- 8 KJ/mol) for previously reacted fragments than for newly reacted fragments (similar to 60 +/- 8 KJ/mol). These last values are consistent with literature data.

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页码：743 / 746

页数：4

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