The rate of non-oxidative galena dissolution in seawater compositions over the pH range of 2–4.5 was determined from batch reactor experiments. The derivative at zero time of a polynomial fit of the Pb concentration versus time data for the first 30 min was used to determine the rate. A plot of R_Gn (rate of galena dissolution) versus pH for data from six experiments is linear (R² = 0.96), with a slope of 0.5. The rate equation describing the rate of galena dissolution as a function of hydrogen ion activity is$$R_{\text{Gn}} = - \,10^{ - 10.72} \left( {a_{{{\text{H}}^{ + } }} } \right)^{0.50}$$Varying the concentration of dissolved oxygen produced no significant effect on the measured rates. The activation energy, based on four experiments carried out over the temperature range of 7–30 °C, is 61.1 kJ/mol.

中文翻译：

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方铅矿在海水中的非氧化溶解动力学

通过分批反应器实验确定了pH范围为2-4.5时海水组合物中非氧化方铅矿的溶解速率。最初30分钟的铅浓度与时间数据的多项式拟合的零时导数用于确定速率。对于来自六个实验的数据，R _Gn（方铅矿溶解速率）与pH的关系图呈线性（R ²  = 0.96），斜率为0.5。描述方铅矿溶解速率与氢离子活性的函数关系的速率方程为$$ R _ {\ text {Gn}} =-\，10 ^ {-10.72} \ left（{a _ {{{\ text {H} } ^ {+}}}} \ right）^ {0.50} $$改变溶解氧的浓度对测得的速率没有明显影响。根据在7–30°C的温度范围内进行的四项实验得出的活化能为61.1 kJ / mol。