Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 12628-12635 |
| Seitenumfang | 8 |
| Fachzeitschrift | Environmental Science and Technology |
| Jahrgang | 48 |
| Ausgabenummer | 21 |
| Publikationsstatus | Veröffentlicht - 24 Sept. 2014 |
Abstract
The current study investigated the interaction of sterically stabilized OECD standard Ag ENP (AgNM-300k) and silver ions (Ag+) in 25 German arable soils with varying properties (organic carbon concentration of 0.4-25 mg g-1 and clay content of <0.1-392 mg g-1) in 24 h batch retention experiments. A soil subset (n = 8) was investigated to test the soil interactions with citrate-stabilized Ag ENP (AgCN30). The adsorption of Ag+ was consistent with the Freundlich model with high KF values (mean KF = 2553 L kg-1, n = 25), which suggested a high retention of Ag+. The retention of AgNM-300k followed a linear partitioning model and generally exhibited a low retention for the majority of the investigated soils (group 1, mean Kr, linear = 3.7 L kg-1, n = 19), and was correlated with the clay content (relation to log10(Kr, linear), r2 = 0.40, n = 19). Soils showing a high retention of AgNM-300k (group 2, mean Kr, linear = 1048 L kg-1, n = 6) either had a low (<5.1) or high pH (>7.0) and generally contained >200 mg g-1 clay. For the sample subset tested, AgCN30 and AgNM-300k were retained in similar dimensions regarding the same soils. The results suggest that the highest risk of long-term ENP mobilization exists when Ag ENP are applied to agricultural soils with low clay contents (<130 mg g-1) and slightly acidic conditions.
ASJC Scopus Sachgebiete
- Chemie (insg.)
- Umweltwissenschaften (insg.)
- Umweltchemie
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in: Environmental Science and Technology, Jahrgang 48, Nr. 21, 24.09.2014, S. 12628-12635.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Retention of sterically and electrosterically stabilized silver nanoparticles in soils
AU - Hoppe, Martin
AU - Mikutta, Robert
AU - Utermann, Jens
AU - Duijnisveld, Wilhelmus
AU - Guggenberger, Georg
PY - 2014/9/24
Y1 - 2014/9/24
N2 - The current study investigated the interaction of sterically stabilized OECD standard Ag ENP (AgNM-300k) and silver ions (Ag+) in 25 German arable soils with varying properties (organic carbon concentration of 0.4-25 mg g-1 and clay content of <0.1-392 mg g-1) in 24 h batch retention experiments. A soil subset (n = 8) was investigated to test the soil interactions with citrate-stabilized Ag ENP (AgCN30). The adsorption of Ag+ was consistent with the Freundlich model with high KF values (mean KF = 2553 L kg-1, n = 25), which suggested a high retention of Ag+. The retention of AgNM-300k followed a linear partitioning model and generally exhibited a low retention for the majority of the investigated soils (group 1, mean Kr, linear = 3.7 L kg-1, n = 19), and was correlated with the clay content (relation to log10(Kr, linear), r2 = 0.40, n = 19). Soils showing a high retention of AgNM-300k (group 2, mean Kr, linear = 1048 L kg-1, n = 6) either had a low (<5.1) or high pH (>7.0) and generally contained >200 mg g-1 clay. For the sample subset tested, AgCN30 and AgNM-300k were retained in similar dimensions regarding the same soils. The results suggest that the highest risk of long-term ENP mobilization exists when Ag ENP are applied to agricultural soils with low clay contents (<130 mg g-1) and slightly acidic conditions.
AB - The current study investigated the interaction of sterically stabilized OECD standard Ag ENP (AgNM-300k) and silver ions (Ag+) in 25 German arable soils with varying properties (organic carbon concentration of 0.4-25 mg g-1 and clay content of <0.1-392 mg g-1) in 24 h batch retention experiments. A soil subset (n = 8) was investigated to test the soil interactions with citrate-stabilized Ag ENP (AgCN30). The adsorption of Ag+ was consistent with the Freundlich model with high KF values (mean KF = 2553 L kg-1, n = 25), which suggested a high retention of Ag+. The retention of AgNM-300k followed a linear partitioning model and generally exhibited a low retention for the majority of the investigated soils (group 1, mean Kr, linear = 3.7 L kg-1, n = 19), and was correlated with the clay content (relation to log10(Kr, linear), r2 = 0.40, n = 19). Soils showing a high retention of AgNM-300k (group 2, mean Kr, linear = 1048 L kg-1, n = 6) either had a low (<5.1) or high pH (>7.0) and generally contained >200 mg g-1 clay. For the sample subset tested, AgCN30 and AgNM-300k were retained in similar dimensions regarding the same soils. The results suggest that the highest risk of long-term ENP mobilization exists when Ag ENP are applied to agricultural soils with low clay contents (<130 mg g-1) and slightly acidic conditions.
UR - http://www.scopus.com/inward/record.url?scp=84908565920&partnerID=8YFLogxK
U2 - 10.1021/es5026189
DO - 10.1021/es5026189
M3 - Article
C2 - 25251386
AN - SCOPUS:84908565920
VL - 48
SP - 12628
EP - 12635
JO - Environmental Science and Technology
JF - Environmental Science and Technology
SN - 0013-936X
IS - 21
ER -