Details
| Original language | English |
|---|---|
| Pages (from-to) | 898-909 |
| Number of pages | 12 |
| Journal | European journal of soil science |
| Volume | 66 |
| Issue number | 5 |
| Publication status | Published - 26 Jun 2015 |
Abstract
The increasing application of silver (Ag)-engineered nanoparticles (ENP) will enhance their release to the aquatic and terrestrial environments. Hence, the retention potential of the sterically stabilized Ag ENP (AgNM-300k, Organisation for Economic Cooperation and Development (OECD)) standard material was tested in a sandy Cambisol and in a clay- and silt-rich Luvisol. In addition, the remobilization potential of the same soils spiked with AgNM-300k was investigated in columns after 3 and 92days of incubation. The AgNM-300k dispersion and the soil solutions were examined with dynamic light scattering (DLS). Inductively coupled plasma optical emission spectroscopy (ICP-OES) and inductively coupled plasma mass spectrometry (ICP-MS) were used to analyse soils and soil solutions subjected to different digestion and extraction techniques (aqua regia, nitric acid (HNO3) and EDTA (ethylenediamninetetraacetate)). The 24-hour batch test showed a 10-fold greater retention coefficient for AgNM-300k in the silt- and clay-rich Luvisol than in the sandy Cambisol. In addition, all applied extraction techniques indicate a greater potential for mobility of Ag ENP for the sandy Cambisol. However, a small release from the column of AgHNO3 (measured Ag content in the fraction <0.45μm after HNO3 digestion) was observed after 3 as well as after 92days of incubation for both soils. The largest amount of Ag was released from the Cambisol during the first percolation step (water:soil ratio=1lkg-1) after the soil was incubated for 3days. This AgHNO3 release corresponded to approximately 1% of the total amount of Ag in the soil column. The correlation obtained between released AgHNO3 and AlHNO3 suggests that even the Ag released at small concentrations is associated with soil colloids. Thus, hetero-aggregation is a potentially important process controlling retention.
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Soil Science
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In: European journal of soil science, Vol. 66, No. 5, 26.06.2015, p. 898-909.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Remobilization of sterically stabilized silver nanoparticles from farmland soils determined by column leaching
AU - Hoppe, Martin
AU - Mikutta, R.
AU - Utermann, J.
AU - Duijnisveld, W.
AU - Kaufhold, S.
AU - Stange, C. F.
AU - Guggenberger, G.
PY - 2015/6/26
Y1 - 2015/6/26
N2 - The increasing application of silver (Ag)-engineered nanoparticles (ENP) will enhance their release to the aquatic and terrestrial environments. Hence, the retention potential of the sterically stabilized Ag ENP (AgNM-300k, Organisation for Economic Cooperation and Development (OECD)) standard material was tested in a sandy Cambisol and in a clay- and silt-rich Luvisol. In addition, the remobilization potential of the same soils spiked with AgNM-300k was investigated in columns after 3 and 92days of incubation. The AgNM-300k dispersion and the soil solutions were examined with dynamic light scattering (DLS). Inductively coupled plasma optical emission spectroscopy (ICP-OES) and inductively coupled plasma mass spectrometry (ICP-MS) were used to analyse soils and soil solutions subjected to different digestion and extraction techniques (aqua regia, nitric acid (HNO3) and EDTA (ethylenediamninetetraacetate)). The 24-hour batch test showed a 10-fold greater retention coefficient for AgNM-300k in the silt- and clay-rich Luvisol than in the sandy Cambisol. In addition, all applied extraction techniques indicate a greater potential for mobility of Ag ENP for the sandy Cambisol. However, a small release from the column of AgHNO3 (measured Ag content in the fraction <0.45μm after HNO3 digestion) was observed after 3 as well as after 92days of incubation for both soils. The largest amount of Ag was released from the Cambisol during the first percolation step (water:soil ratio=1lkg-1) after the soil was incubated for 3days. This AgHNO3 release corresponded to approximately 1% of the total amount of Ag in the soil column. The correlation obtained between released AgHNO3 and AlHNO3 suggests that even the Ag released at small concentrations is associated with soil colloids. Thus, hetero-aggregation is a potentially important process controlling retention.
AB - The increasing application of silver (Ag)-engineered nanoparticles (ENP) will enhance their release to the aquatic and terrestrial environments. Hence, the retention potential of the sterically stabilized Ag ENP (AgNM-300k, Organisation for Economic Cooperation and Development (OECD)) standard material was tested in a sandy Cambisol and in a clay- and silt-rich Luvisol. In addition, the remobilization potential of the same soils spiked with AgNM-300k was investigated in columns after 3 and 92days of incubation. The AgNM-300k dispersion and the soil solutions were examined with dynamic light scattering (DLS). Inductively coupled plasma optical emission spectroscopy (ICP-OES) and inductively coupled plasma mass spectrometry (ICP-MS) were used to analyse soils and soil solutions subjected to different digestion and extraction techniques (aqua regia, nitric acid (HNO3) and EDTA (ethylenediamninetetraacetate)). The 24-hour batch test showed a 10-fold greater retention coefficient for AgNM-300k in the silt- and clay-rich Luvisol than in the sandy Cambisol. In addition, all applied extraction techniques indicate a greater potential for mobility of Ag ENP for the sandy Cambisol. However, a small release from the column of AgHNO3 (measured Ag content in the fraction <0.45μm after HNO3 digestion) was observed after 3 as well as after 92days of incubation for both soils. The largest amount of Ag was released from the Cambisol during the first percolation step (water:soil ratio=1lkg-1) after the soil was incubated for 3days. This AgHNO3 release corresponded to approximately 1% of the total amount of Ag in the soil column. The correlation obtained between released AgHNO3 and AlHNO3 suggests that even the Ag released at small concentrations is associated with soil colloids. Thus, hetero-aggregation is a potentially important process controlling retention.
UR - http://www.scopus.com/inward/record.url?scp=84941259433&partnerID=8YFLogxK
U2 - 10.1111/ejss.12270
DO - 10.1111/ejss.12270
M3 - Article
AN - SCOPUS:84941259433
VL - 66
SP - 898
EP - 909
JO - European journal of soil science
JF - European journal of soil science
SN - 1351-0754
IS - 5
ER -