![\"Parallel](\"https:\/\/www.vanderbilt.edu\/leaching\/wp-content\/uploads\/2010\/12\/ParBatchScheme.png\" "\\"ParBatchScheme\\"")
<\/a>This test provides the liquid-solid partitioning at the natural pH of the solid material as a function of liquid-to-solid ratio (L\/S) under conditions that approach chemical equilibrium between the liquid and solid phases. This protocol consists of five parallel extractions of a particle-size reduced solid material (to facilitate the approach to equilibrium) in reagent water over a range of L\/S values. The eluate concentrations at a low L\/S provides insight into pore solution composition either in a granular bed or in the pore space of low-permeability material (e.g., solidified monolithic or compacted granular fill).<\/p>\n
Detailed Description:<\/strong><\/p>\n Method 1316 is used to determine the LSP between water and a solid material at equilibrium. This test is a parallel batch procedure with each extraction conducted at a different L\/S.\u00a0 This equilibrium test\u00a0is conducted on\u00a0a granular sample of material\u00a0such that particle-size reduction may be required to faciliate equilibrium.<\/p>\n A known mass of solid material is placed in each of five extraction vessels and deionized water is added at L\/S of 10, 5, 2, 1, and 0.5 mL\/g-dry. The vessels are tumbled in an end-over-end fashion for a contant time based on the maximum particle-size and designed to allow the extraction to obtain equilibrium. Eluates pH, conductivity are recorded and analytical samples are filtered and preserved for chemical analysis.<\/p>\n The output parameters of Method 1316 (pH, conductivity, constituent concentrations, cumulative mass release) are represented as a function of L\/S. The results of this test are used to show changes in equilibrium concentrations as L\/S approach that of field conditions and to estimate porewater concentrations at low L\/S.<\/p>\n Method 1316 Downloads:<\/strong><\/p>\n Presentation<\/p>\n<\/a>