Sulfide mineral dissolution is an important reaction controlling geochemical and environmental chemical processes in aqueous environments. In this study, we quantitatively evaluated the kinetic influence of galvanic interactions between different sulfide minerals on their dissolution in seawater. Four hydrothermal sulfides with different amounts of Fe disulfide minerals (pyrite) were reacted with artificial seawater for 144 h, and the dissolution rates of Zn and Pb were determined by an extraction method. The Zn dissolution rates from samples with high Fe/Zn molar ratios (>0.26) were 1.3–1.5 × 10⁻¹⁰ mol m⁻² s⁻¹; approximately one order of magnitude higher than those of samples with low Fe/Zn molar ratios (<0.002; 1.6–1.8 × 10⁻¹¹ mol m⁻² s⁻¹). The Pb dissolution rates from a sample with high Fe disulfide were approximately nine orders of magnitude higher (8.4× 10⁻¹⁰ mol m⁻² s⁻¹) than reference data of the single galena dissolution rate (8.9 × 10⁻¹⁹ mol m⁻² s⁻¹). The higher solubility of PbSO₄ than PbS and PbCO₃ could explain the intense release of Pb from the other samples. These results and mineralogical observations with X-ray diffraction, X-ray photoelectron spectroscopy, and electron probe micro-analysis of sulfide mineral particulates provide evidence for the selective dissolution of anodic sulfide minerals (e.g., sphalerite and galena) at a higher reaction rate than cathodic sulfide minerals of Fe disulfide (e.g., pyrite).

硫化物矿物溶解是控制水性环境中地球化学和环境化学过程的重要反应。在这项研究中，我们定量评估了不同硫化物之间的电流相互作用对其在海水中溶解的动力学影响。使四种具有不同含量的二硫化铁矿物（硫铁矿）的热液硫化物与人造海水反应144小时，并通过萃取法确定Zn和Pb的溶解速率。高Fe / Zn摩尔比（> 0.26）的样品中Zn的溶解速率为1.3-1.5×10 ^-10  mol m ^-2  s ^-1 ; 比低Fe / Zn摩尔比的样品高约一个数量级（<0.002; 1.6–1.8×10 ^-11 mol m ^-2  s ^-1）。高二硫化铁样品中的Pb溶解速率比单方铅矿溶解速率的参考数据（8.9×10 ^-19  mol m- ）高约九个数量级（8.4×10 ^-10  mol m ^-2  s ^-1）^{。 2}  s ^-1）。PbSO _4的溶解度高于PbS和PbCO ₃可以解释其他样品中铅的强烈释放。这些结果以及通过X射线衍射，X射线光电子能谱和电子探针对硫化物矿物颗粒进行微观分析而获得的矿物学观察结果，为阳极硫化物矿物（例如闪锌矿和方铅矿）的选择性溶解提供了证据，其反应速率比反应速率高。二硫化铁的阴极硫化物（例如黄铁矿）。