REFINEMENT OF ADTI-WP2 STANDARD WEATHERING PROCEDURES, AND EVALUATION OF PARTICLE SIZE AND SURFACE AREA EFFECTS UPON LEACHING RATES: PART 1: LABORATORY EVALUATION OF METHOD PERFORMANCE ¹
REFINEMENT OF ADTI-WP2 STANDARD WEATHERING PROCEDURES, AND EVALUATION OF PARTICLE SIZE AND SURFACE AREA EFFECTS UPON LEACHING RATES: PART 1: LABORATORY EVALUATION OF METHOD PERFORMANCE ¹
复制标题
ADTI-WP2 标准风化程序的改进，以及颗粒尺寸和表面积对浸出率影响的评估：第 1 部分：方法性能的实验室评估 1
DOI：
--
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
D. Wood
中科院分区：
文献类型：
--
作者：
R. J. Hornberger;K. Brady;J. Cuddeback;W. White;B. Scheetz;W. Telliard;Stephen C. Parsons;C. Loop;T. Bergstresser;C. R. McCracken;D. Wood
第二年的方法开发工作是在ADTI-WP1（湿度电池）和ADTI-WP2（浸出柱）标准测试方法上进行的。浸出柱法的性能优于湿池法。在改进浸出柱方法时，对柱直径和水/气处理程序的变化进行了评估。两个商业实验室和一个大学研究实验室参与了这项研究。评估了重复样品之间的相对百分比差异和实验室之间的相对标准偏差。在4种不同岩性样品的风化测试前后，使用BET方法对8种粒径级别中的每一种进行了表面积测量。观察到的碱度浓度与PCO2升高一致，对于钙质岩石，方解石接近饱和。高硫煤矸石样品的最大酸度（33,700 mg/L）、硫酸盐（37,404 mg/L）和铁（9,120 mg/L）浓度与野外观测值一致。页岩样品的测量表面积明显高于砂岩、石灰石和煤矸石样品。然而，对于大多数岩石样品和大多数粒度类别，风化后的表面积测量结果与风化前的测量结果没有显著差异。
The second year of method development work was conducted on the ADTI-WP1 (Humidity Cell) and the ADTI-WP2 (Leaching Column) standard test methods. The performance of the leaching column method was superior to the humidity cell method. In making improvements to the leaching column method, variations in column diameter and water-handling/gas-handling procedures were evaluated. Two commercial laboratories and a university research lab participated in the study. Relative percent differences between duplicate samples and relative standard deviations between laboratories were evaluated. Surface area measurements, using BET methods, were conducted on each of 8 particle size classes, before and after weathering tests on 4 different lithologic samples. Observed alkalinity concentrations were consistent with the elevated PCO2 and approached saturation with respect to calcite for calcareous rocks. The maximum concentrations of acidity (33,700 mg/L), sulfates (37,404 mg/L) and iron (9,120 mg/L) for the high-sulfur coal refuse sample were consistent with the maximum concentrations observed in the field. The measured surface areas of the shale samples were significantly higher than the sandstone, limestone and coal- refuse samples. However, the surface area measurements post-weathering were not significantly different from the pre-weathering measurements for most rock samples and most particle size classes.