Details
| Original language | English |
|---|---|
| Pages (from-to) | 667-677 |
| Number of pages | 11 |
| Journal | European journal of soil science |
| Volume | 68 |
| Issue number | 5 |
| Publication status | Published - 24 Aug 2017 |
Abstract
Adsorptive interactions of organic molecules with soil minerals often impair their bioavailability. However, little is known about the adsorption behaviour of phenolic and nitrogenous compounds on different minerals and their mutual interaction with respect to competition and surface conditioning (i.e. surface modification induced by preceding adsorption of the other class of compounds). Therefore, batch adsorption experiments were done to study the interaction between phenolic acids (PAs; salicylic acid, Sal; syringic acid, Syr; ferulic acid, Fer; vanillic acid, Van) and amino acids (AAs; lysine, Lys; glutamic acid, Glu; leucine, Leu; phenylalanine, Phe) during adsorption on goethite and Ca2+-montmorillonite at pH 6 by applying adsorbate concentrations of 0.01, 0.05 and 0.1 mm. Larger adsorption of PAs was observed on goethite than montmorillonite, whereas the phyllosilicate was a better adsorbent for AAs than the oxide. Among all tested PAs, Sal was preferentially adsorbed on both minerals. For the AAs, Glu was preferentially adsorbed on goethite and Lys on montmorillonite. The AAs were more competitive than PAs and partially suppressed the adsorption of PAs on both minerals. The adsorption of PAs or AAs on both minerals was enhanced by surface conditioning with the other group, with larger effects for goethite than montmorillonite. For goethite, surface conditioning by PAs enhanced the adsorption of AAs more (by 97–161%) than did AAs for PAs (9–48%). The results support the hypothesis that pre-adsorption of one class of organic compound can enhance the retention of another class. This suggests that adsorbed organic matter on soil mineral phases might be subject to a self-strengthening effect. Highlights: Phenolic acids (PAs) were preferentially retained on goethite. Amino acids (AAs) were preferentially retained on montmorillonite. AAs were more competitive than PAs for adsorption sites on both minerals. Pre-adsorption of one class of compound can enhance the retention of another class.
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Soil Science
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In: European journal of soil science, Vol. 68, No. 5, 24.08.2017, p. 667-677.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Competition and surface conditioning alter the adsorption of phenolic and amino acids on soil minerals
AU - Gao, J.
AU - Jansen, B.
AU - Cerli, C.
AU - Helmus, R.
AU - Mikutta, R.
AU - Dultz, S.
AU - Guggenberger, G.
AU - Kalbitz, K.
N1 - Funding information: Council for financial support. This study was partially supported by the Deutsche Forschungsgemeinschaft DFG (FOR1806, ‘The Forgotten Part of Carbon Cycling: Organic Matter Storage and Turnover in Subsoils (SUBSOM)’).
PY - 2017/8/24
Y1 - 2017/8/24
N2 - Adsorptive interactions of organic molecules with soil minerals often impair their bioavailability. However, little is known about the adsorption behaviour of phenolic and nitrogenous compounds on different minerals and their mutual interaction with respect to competition and surface conditioning (i.e. surface modification induced by preceding adsorption of the other class of compounds). Therefore, batch adsorption experiments were done to study the interaction between phenolic acids (PAs; salicylic acid, Sal; syringic acid, Syr; ferulic acid, Fer; vanillic acid, Van) and amino acids (AAs; lysine, Lys; glutamic acid, Glu; leucine, Leu; phenylalanine, Phe) during adsorption on goethite and Ca2+-montmorillonite at pH 6 by applying adsorbate concentrations of 0.01, 0.05 and 0.1 mm. Larger adsorption of PAs was observed on goethite than montmorillonite, whereas the phyllosilicate was a better adsorbent for AAs than the oxide. Among all tested PAs, Sal was preferentially adsorbed on both minerals. For the AAs, Glu was preferentially adsorbed on goethite and Lys on montmorillonite. The AAs were more competitive than PAs and partially suppressed the adsorption of PAs on both minerals. The adsorption of PAs or AAs on both minerals was enhanced by surface conditioning with the other group, with larger effects for goethite than montmorillonite. For goethite, surface conditioning by PAs enhanced the adsorption of AAs more (by 97–161%) than did AAs for PAs (9–48%). The results support the hypothesis that pre-adsorption of one class of organic compound can enhance the retention of another class. This suggests that adsorbed organic matter on soil mineral phases might be subject to a self-strengthening effect. Highlights: Phenolic acids (PAs) were preferentially retained on goethite. Amino acids (AAs) were preferentially retained on montmorillonite. AAs were more competitive than PAs for adsorption sites on both minerals. Pre-adsorption of one class of compound can enhance the retention of another class.
AB - Adsorptive interactions of organic molecules with soil minerals often impair their bioavailability. However, little is known about the adsorption behaviour of phenolic and nitrogenous compounds on different minerals and their mutual interaction with respect to competition and surface conditioning (i.e. surface modification induced by preceding adsorption of the other class of compounds). Therefore, batch adsorption experiments were done to study the interaction between phenolic acids (PAs; salicylic acid, Sal; syringic acid, Syr; ferulic acid, Fer; vanillic acid, Van) and amino acids (AAs; lysine, Lys; glutamic acid, Glu; leucine, Leu; phenylalanine, Phe) during adsorption on goethite and Ca2+-montmorillonite at pH 6 by applying adsorbate concentrations of 0.01, 0.05 and 0.1 mm. Larger adsorption of PAs was observed on goethite than montmorillonite, whereas the phyllosilicate was a better adsorbent for AAs than the oxide. Among all tested PAs, Sal was preferentially adsorbed on both minerals. For the AAs, Glu was preferentially adsorbed on goethite and Lys on montmorillonite. The AAs were more competitive than PAs and partially suppressed the adsorption of PAs on both minerals. The adsorption of PAs or AAs on both minerals was enhanced by surface conditioning with the other group, with larger effects for goethite than montmorillonite. For goethite, surface conditioning by PAs enhanced the adsorption of AAs more (by 97–161%) than did AAs for PAs (9–48%). The results support the hypothesis that pre-adsorption of one class of organic compound can enhance the retention of another class. This suggests that adsorbed organic matter on soil mineral phases might be subject to a self-strengthening effect. Highlights: Phenolic acids (PAs) were preferentially retained on goethite. Amino acids (AAs) were preferentially retained on montmorillonite. AAs were more competitive than PAs for adsorption sites on both minerals. Pre-adsorption of one class of compound can enhance the retention of another class.
UR - http://www.scopus.com/inward/record.url?scp=85027987671&partnerID=8YFLogxK
U2 - 10.1111/ejss.12459
DO - 10.1111/ejss.12459
M3 - Article
AN - SCOPUS:85027987671
VL - 68
SP - 667
EP - 677
JO - European journal of soil science
JF - European journal of soil science
SN - 1351-0754
IS - 5
ER -