本powerpoint演示文稿首先简要介绍了该研究的历史概况，包括以下内容: 碳酸盐岩的“经典”平衡模型+ 正磷酸盐系统显示出最好的结果 根据溶解度，pH值在7.2到7.8之间 预言； 达到LCR行动水平的困难报告 DS-pH>8；和 在广泛的平衡和出版的变化 关键铅固体和水络合物的常数， 这可能会影响预测和治疗选择。介绍了测试系统的实验装置，以及管道准备、进行的化学分析、数据分析方法以及与规模矿物学的集成。陈述结论如下: 通过以下方法确认了对最佳铅溶解度降低的事先预测: pH值在7到8之间的正磷酸盐； pH值下正磷酸盐性能的确认问题 在8岁左右； 机理尚不清楚，但在几个相界附近； 不存在简单的电荷、胶体稳定性或粒径问题；和 饱和指数法很有前途，但更复杂 因为 不平衡，即使在1年后， 亚稳相（如Cu（II））的重要作用， 同时存在多个阶段，以及 出现了一些未知的固相。

This powerpoint presentation begins by providing a brief historical overview of the study, including the following: "classical" equilibrium model for carbonate + orthophosphate system suggests best results between about pH 7.2 and 7.8 based on solubility predictions; reports of difficulties achieving LCR Action Level with DS pH > 8; and, wide variation in tabulated and published equilibrium constants for key lead solids and aqueous complexes, which can affect predictions and treatment choices. The experimental setup of test systems is presented, along with pipe preparation, chemical analyses performed, data analysis approach, and integration with scale mineralogy. Presentation conclusions indicate the following: confirmed prior prediction of best lead solubility reduction by orthophosphate between pH 7 and 8; confirmed problem with orthophosphate performance at pH in low- to mid-8's; mechanism is not clear but near several phase boundaries; not simple charge, colloid stability or particle size issue; and, Saturation Index approach promising, but more complicated than expected because of disequilibrium, even after 1 year, important role of metastable phases (like Cu(II)), multiple phases simultaneously present, and some unidentified solid phases present.