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.
引用
收藏
页码：743 / 746
页数：4
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