Details
| Original language | English |
|---|---|
| Pages (from-to) | 681-687 |
| Number of pages | 7 |
| Journal | Journal of Plant Nutrition and Soil Science |
| Volume | 161 |
| Issue number | 6 |
| Publication status | Published - 1998 |
Abstract
Cd sorption isotherms (n = 24) were established for arable, sandy-soils of the 'Fuhrberger Feld' catchment area northeast of Hannover (Germany) using 0.01 Mc Ca(NO3)2 solution with Cd additions ranging from 0 to 44 μMc Cd. Alternative fractions of initially (prior to analysis) sorbed Cd (S0) were added to the amount sorbed during the experiments. The Freundlich equation was fitted to the resulting isotherms. The obtained retention parameters k and M varied with respect to the different S0 fractions. Isotherms corrected with CdEDTA as S0 fraction were nonlinear in their log-form. The highest degree of log-linearity is obtained if S0 is characterized by 40% of the aqua regia extractable Cd. The corresponding k values ranged from 36 to 1275 g1-M LM kg-1 (mean 338 g1-M LM kg-1, cv = 92%). The Freundlich exponent M showed less variation (0.7 to 1.1, cv = 12%) with a mean of 0.88. Functions based on these parameters predicted Cd concentrations in Ca(NO3)2-soil suspensions well (r2 = 0.96) but were hardly related to Cd concentrations of 'fresh' soil solutions (r2 = 0.20).
Keywords
- Cadmium, Freundlich parameters, Sorption isotherms
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Soil Science
- Agricultural and Biological Sciences(all)
- Plant Science
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In: Journal of Plant Nutrition and Soil Science, Vol. 161, No. 6, 1998, p. 681-687.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Parameterization and regionalization of Cd sorption characteristics of sandy soils. I. Freundlich type parameters
AU - Springob, Günther
AU - Böttcher, Jürgen
N1 - Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 1998
Y1 - 1998
N2 - Cd sorption isotherms (n = 24) were established for arable, sandy-soils of the 'Fuhrberger Feld' catchment area northeast of Hannover (Germany) using 0.01 Mc Ca(NO3)2 solution with Cd additions ranging from 0 to 44 μMc Cd. Alternative fractions of initially (prior to analysis) sorbed Cd (S0) were added to the amount sorbed during the experiments. The Freundlich equation was fitted to the resulting isotherms. The obtained retention parameters k and M varied with respect to the different S0 fractions. Isotherms corrected with CdEDTA as S0 fraction were nonlinear in their log-form. The highest degree of log-linearity is obtained if S0 is characterized by 40% of the aqua regia extractable Cd. The corresponding k values ranged from 36 to 1275 g1-M LM kg-1 (mean 338 g1-M LM kg-1, cv = 92%). The Freundlich exponent M showed less variation (0.7 to 1.1, cv = 12%) with a mean of 0.88. Functions based on these parameters predicted Cd concentrations in Ca(NO3)2-soil suspensions well (r2 = 0.96) but were hardly related to Cd concentrations of 'fresh' soil solutions (r2 = 0.20).
AB - Cd sorption isotherms (n = 24) were established for arable, sandy-soils of the 'Fuhrberger Feld' catchment area northeast of Hannover (Germany) using 0.01 Mc Ca(NO3)2 solution with Cd additions ranging from 0 to 44 μMc Cd. Alternative fractions of initially (prior to analysis) sorbed Cd (S0) were added to the amount sorbed during the experiments. The Freundlich equation was fitted to the resulting isotherms. The obtained retention parameters k and M varied with respect to the different S0 fractions. Isotherms corrected with CdEDTA as S0 fraction were nonlinear in their log-form. The highest degree of log-linearity is obtained if S0 is characterized by 40% of the aqua regia extractable Cd. The corresponding k values ranged from 36 to 1275 g1-M LM kg-1 (mean 338 g1-M LM kg-1, cv = 92%). The Freundlich exponent M showed less variation (0.7 to 1.1, cv = 12%) with a mean of 0.88. Functions based on these parameters predicted Cd concentrations in Ca(NO3)2-soil suspensions well (r2 = 0.96) but were hardly related to Cd concentrations of 'fresh' soil solutions (r2 = 0.20).
KW - Cadmium
KW - Freundlich parameters
KW - Sorption isotherms
UR - http://www.scopus.com/inward/record.url?scp=23644456021&partnerID=8YFLogxK
U2 - 10.1002/jpln.1998.3581610612
DO - 10.1002/jpln.1998.3581610612
M3 - Article
AN - SCOPUS:23644456021
VL - 161
SP - 681
EP - 687
JO - Journal of Plant Nutrition and Soil Science
JF - Journal of Plant Nutrition and Soil Science
SN - 1436-8730
IS - 6
ER -