Practical issues relating to soil column chromatography for sorption parameter determination

Phytotoxin sorption to clay minerals

“…Quality control measurements were executed as suggested by Bi et al [24] and method performance was overall comparable with our preceding study on SOC [12]. Clay columns were firstly evaluated by assessing the retention factor k of analytes at different flow rates between 0.025 and 0.15 mL min −1 (Additional file 1: Figure S1).…”

Sorbent material characterization using in‐tube extraction needles as inverse gas chromatography column

“…Further, the first moment analysis could not be applied for peak analysis because the method is susceptible to errors in case of strongly tailing peaks. For this reason, the retention times were determined as a median value using the half mass point method as proposed previously [25]. It consists in dividing the peak area into two equal parts.…”

Geochemical processes during the stabilization of potentially toxic elements (PTEs) in contaminated soil by using mineral amendments

“…Geochemical processes during the stabilization of potentially toxic elements in contaminated soil using mineral amendments [xv] LIST OF TABLES (Limousin et al, 2007;Bi et al, 2010) 2-6: Toxic effects of some trace metals and their relationship with human activities (Kabata-Pendias et al, 2007;Carolin et al, 2017;Tabelin et al, 2018) Geochemical processes during the stabilization of potentially toxic elements in contaminated soil using mineral amendments…”

“…Despite these difficulties, dynamic sorption has some advantages compared to static sorption (Table 2-2), the most important being the simulation of field conditions. (Limousin et al, 2007;Bi et al, 2010). Advantages Disadvantages High solid:liquid ratios, being more accurate in describing the processes that occur in a natural system (i.e.…”

“…Due to the presence of smectite in the samples, all clays were diluted with quartz sand (particle size 10 to 30μm). Quartz sand was selected as a dilution agent to improve the hydraulic properties of the sorbents (Bi et al, 2010). Moreover, quartz is considered an inert material regarding sorption.…”