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Transport behavior of PVP (polyvinylpyrrolidone) - AgNPs in saturated packed column: Effect of ionic strength and HA

포화 컬럼실험에서 이온강도 변화 및 유기물질 출현에 의한 PVP로 코팅된 은나노 입자의 거동 연구

Heo, Jiyong;Han, Jonghun;Her, Namguk
허지용;한종훈;허남국

  • Received : 2016.04.21
  • Accepted : 2016.05.20
  • Published : 2016.06.01

Abstract

Recent Engineered nanoparticles were increasingly exposed to environmental system with the wide application and production of nanomaterials, concerns are increasing about their environmental risk to soil and groundwater system. In order to assess the transport behavior of silver nanoparticles (AgNPs), a saturated packed column experiments were examined. Inductively coupled plasma-mass spectrometry and a DLS detector was used for concentration and size measurement of AgNPs. The column experiment results showed that solution chemistry had a considerable temporal deposition of AgNPs on the porous media of solid glass beads. In column experiment, comparable mobility improvement of AgNPs were observed by changing solution chemistry conditions from salts (in both NaCl and $CaCl_2$ solutions) to DI conditions, but in much lower ionic strength (IS) with $CaCl_2$. Additionally, the fitted parameters with two-site kinetic attachment model form the experimental breakthrough curves (BTCs) were associated that the retention rates of the AgNPs aggregates were enhanced with increasing IS under both NaCl and $CaCl_2$ solutions.

Keywords

Aggregation;Column experiment;Mobility;Silver nanoparticles (AgNPs);Two-site kinetic attachment model

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Acknowledgement

Supported by : 환경부