Adsorption capacity of chosen sandy ground with respect to contaminants relocating with groundwater

Abstract

One of the most important problems concerning contaminant transport in the ground is the problem related to the definition of parameters characterizing the adsorption capacity of ground for the chosen contaminants relocating with groundwater. In this paper, for chloride and sulfate indicators relocating in sandy ground, the numerical values of retardation factors (Ra) (treated as average values) and pore groundwater velocities with adsorption (ux/Ra) (in micro-pore ground spaces) are taken into consideration. Based on 2D transport equation the maximal dimensionless concentration values (C*max c) in the chosen ground cross-sections were calculated. All the presented numerical calculations are related to the unpublished measurement series which was marked in this paper as: October 1982. For this measurement series the calculated concentration values are compared to the measured concentration ones (C*max m) given recently to the author of this paper. In final part of this paper the parameters characterizing adsorption capacity (Ra, ux/Ra) are also compared to the same parameters calculated for the two earlier measurement series. Such comparison also allowed for the estimation of a gradual in time depletion of adsorption capacity for the chosen sandy ground.

Archives of Environmental Protection

“…for three measurement series (Szczecin 1982) Measurement series November 1981 (Aniszewski 2009) May 1982 (Aniszewski 2013) October 1982 (Aniszewski 2017) Average velocity of a groundwater u x [m•s -1 ]: -without adsorption (u x ) (R a = 1.00) [Szczecin 1982] -velocity of ions (u…”

“…The number of piezometers selected with distances from the source of the pollution leak (lagoon with slurry) III (8) ξ ≈ 0.38 x ≈ 40 m 0.4176 1) 0.2990 3) 0.0186 5) 0.3256 2) 0.3048 4) 0.0208 6) IX (4) ξ ≈ 0.66 x ≈ 70 m 0.2399 1) 0.2287 3) 0.0112 5) 0.1562 2) 0.1489 4) 0.0073 6) VII (6) ξ ≈ 0.86 x ≈ 90 m 0.1628 1) 0.1494 3) 0.0134 5) 0.0982 2) 0.0944 4) 0.0038 6) X (5) ξ ≈ 1.00 x ≈ 105 m 0.1172 1) 0.1065 3) 0.0107 5) 0.0782 2) 0.0759 4) 0.0023 6) of concentrations for sulfates in three measurement series (Aniszewski 2009(Aniszewski , 2013(Aniszewski , 2017 Values (∆ C ) given in Table 4 show their gradual time decrease, starting from the fi rst series (November 1981 -as the highest value) to the last series (October 1982 -as the lowest value). A similar tendency can also be observed for the time--varying values of the diff erences of concentrations (∆ C ) between particular series of measurements in the corresponding measurement cross-sections.…”

“…This is evidenced Table 2. Assumed and calculated dispersion parameters for selected pollutants (chlorides and sulfates) in analyzed ground for three measurement series (Aniszewski 2009, 2013, 2017, Chalfen 2012 Measurement series November 1981 (Aniszewski 2009) May 1982 (Aniszewski 2013) October 1982 (Aniszewski 2017) Chlorides (NaCl) Sulfates (Na by higher values of adsorbed pollutants for sulfates: from 1.1 to 3.5 g•m -3 and, correspondingly, by lower values for chlorides: from 0.3 to 1.2 g•m -3 . Also numerical values of parameters (K, N, R a ) can provide evidence of their gradual time decrease for the three measurement series.…”

“…November 1981 (Aniszewski 2009) May 1982 (Aniszewski 2013) October 1982 (Aniszewski 2017) (Szczecin 1982). The calculated values of parameter (∆ C ) (as diff erences of calculated and measured concentrations) are also given in Table 4 (with the upper index 5 for chlorides and 6 for sulfates, respectively -see explanations under this table ).…”

“…Simultaneously, in numerical Table 3. Calculated adsorption parameters for selected pollutants (chlorides and sulfates) in analyzed ground for adopted non-linear Freundlich isotherm and for three measurement series (Aniszewski 2009(Aniszewski , 2013(Aniszewski , 2017…”