Experimental and Numerical Investigations of Silver Nanoparticle Transport under Variable Flow and Ionic Strength in Soil

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Experimental and Numerical Investigations of Silver Nanoparticle Transport under Variable Flow and Ionic Strength in Soil. / Makselon, Joanna; Zhou, Dan; Engelhardt, I; Klumpp, Eerwin; Jacques, Diederik.

In: Environmental Science & Technology, Vol. 51, No. 4, 21.02.2017, p. 2096-2104.

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Makselon, J, Zhou, D, Engelhardt, I, Klumpp, E & Jacques, D 2017, 'Experimental and Numerical Investigations of Silver Nanoparticle Transport under Variable Flow and Ionic Strength in Soil', Environmental Science & Technology, vol. 51, no. 4, pp. 2096-2104. https://doi.org/10.1021/acs.est.6b04882

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Makselon, Joanna ; Zhou, Dan ; Engelhardt, I ; Klumpp, Eerwin ; Jacques, Diederik. / Experimental and Numerical Investigations of Silver Nanoparticle Transport under Variable Flow and Ionic Strength in Soil. In: Environmental Science & Technology. 2017 ; Vol. 51, No. 4. pp. 2096-2104.

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@article{f10924cceb89408994a50001599112e6,
title = "Experimental and Numerical Investigations of Silver Nanoparticle Transport under Variable Flow and Ionic Strength in Soil",
abstract = "Unsaturated column experiments were conducted with an undisturbed loamy sand soil to investigate the influence of flow interruption (FI) and ionic strength (IS) on the transport and retention of surfactant-stabilized silver nanoparticles (AgNP) and the results were compared to those obtained under continuous flow conditions. AgNP concentrations for breakthrough curves (BTCs) and retention profiles (RPs) were analyzed by ICP-MS. Experimental results were simulated by the numerical code HP1 (Hydrus-PhreeqC) with the DLVO theory, extended colloid filtration theory and colloid release model. BTCs of AgNP showed a dramatic drop after FI compared to continuous flow conditions. Evaporation increased due to FI, resulting in increased electrical conductivity of the soil solution, which led to a totally reduced mobility of AgNP. A reduction of IS after FI enhanced AgNP mobility slightly. Here the strongly increased Al and Fe concentration in the effluent suggested that soil colloids facilitated the release of AgNP (cotransport). The numerical model reproduced the measured AgNP BTCs and indicated that attachment to the air−water interface (AWI) occurring during FI was the key process for AgNP retention.",
keywords = "silver , nanoparticle, transport, flow, ionic , soil",
author = "Joanna Makselon and Dan Zhou and I Engelhardt and Eerwin Klumpp and Diederik Jacques",
note = "Score=10",
year = "2017",
month = feb,
day = "21",
doi = "10.1021/acs.est.6b04882",
language = "English",
volume = "51",
pages = "2096--2104",
journal = "Environmental Science & Technology",
issn = "0013-936X",
publisher = "ACS - American Chemical Society",
number = "4",

}

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TY - JOUR

T1 - Experimental and Numerical Investigations of Silver Nanoparticle Transport under Variable Flow and Ionic Strength in Soil

AU - Makselon, Joanna

AU - Zhou, Dan

AU - Engelhardt, I

AU - Klumpp, Eerwin

AU - Jacques, Diederik

N1 - Score=10

PY - 2017/2/21

Y1 - 2017/2/21

N2 - Unsaturated column experiments were conducted with an undisturbed loamy sand soil to investigate the influence of flow interruption (FI) and ionic strength (IS) on the transport and retention of surfactant-stabilized silver nanoparticles (AgNP) and the results were compared to those obtained under continuous flow conditions. AgNP concentrations for breakthrough curves (BTCs) and retention profiles (RPs) were analyzed by ICP-MS. Experimental results were simulated by the numerical code HP1 (Hydrus-PhreeqC) with the DLVO theory, extended colloid filtration theory and colloid release model. BTCs of AgNP showed a dramatic drop after FI compared to continuous flow conditions. Evaporation increased due to FI, resulting in increased electrical conductivity of the soil solution, which led to a totally reduced mobility of AgNP. A reduction of IS after FI enhanced AgNP mobility slightly. Here the strongly increased Al and Fe concentration in the effluent suggested that soil colloids facilitated the release of AgNP (cotransport). The numerical model reproduced the measured AgNP BTCs and indicated that attachment to the air−water interface (AWI) occurring during FI was the key process for AgNP retention.

AB - Unsaturated column experiments were conducted with an undisturbed loamy sand soil to investigate the influence of flow interruption (FI) and ionic strength (IS) on the transport and retention of surfactant-stabilized silver nanoparticles (AgNP) and the results were compared to those obtained under continuous flow conditions. AgNP concentrations for breakthrough curves (BTCs) and retention profiles (RPs) were analyzed by ICP-MS. Experimental results were simulated by the numerical code HP1 (Hydrus-PhreeqC) with the DLVO theory, extended colloid filtration theory and colloid release model. BTCs of AgNP showed a dramatic drop after FI compared to continuous flow conditions. Evaporation increased due to FI, resulting in increased electrical conductivity of the soil solution, which led to a totally reduced mobility of AgNP. A reduction of IS after FI enhanced AgNP mobility slightly. Here the strongly increased Al and Fe concentration in the effluent suggested that soil colloids facilitated the release of AgNP (cotransport). The numerical model reproduced the measured AgNP BTCs and indicated that attachment to the air−water interface (AWI) occurring during FI was the key process for AgNP retention.

KW - silver

KW - nanoparticle

KW - transport

KW - flow

KW - ionic

KW - soil

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/24779446

U2 - 10.1021/acs.est.6b04882

DO - 10.1021/acs.est.6b04882

M3 - Article

VL - 51

SP - 2096

EP - 2104

JO - Environmental Science & Technology

JF - Environmental Science & Technology

SN - 0013-936X

IS - 4

ER -

ID: 2556281