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Cotransport and Deposition of Iron Oxides with Different-Sized Plastic Particles in Saturated Quartz Sand

Title
Cotransport and Deposition of Iron Oxides with Different-Sized Plastic Particles in Saturated Quartz Sand
Author
김현중
Keywords
HUMIC-ACID; HYDROXYAPATITE NANOPARTICLES; ORGANIC-MATTER; POROUS-MEDIA; IONIC-STRENGTH; TRANSPORT; MICROPLASTICS; COLLOIDS; RETENTION; BACTERIA
Issue Date
2019-04
Publisher
AMER CHEMICAL SOC
Citation
ENVIRONMENTAL SCIENCE & TECHNOLOGY, v. 53, no. 7, page. 3547-3557
Abstract
The present study was designed to investigate the cotransport and deposition of different-sized plastic particle from nano- (0.02 μm) to micrometer-scale (0.2 and 2 μm) with goethite and hematite (two types of representative iron oxides abundant in natural environment) in porous media at both low (5 mM) and high ionic strength (25 mM) in NaCl solutions. We found that through different mechanisms (i.e., modification of surface properties of iron oxides, steric repulsion, or alteration in deposition sites on quartz sand), different-sized plastic particles induced different effects on the transport and deposition behaviors of iron oxides in quartz sand. Likewise, via different mechanisms such as change of surface properties or alteration in deposition sites on quartz sand, different transport behaviors for different sized plastic particles induced by the copresence of iron oxides were also observed. The results of this study suggested that cotransport of iron oxides and plastic particles in porous media is far more complex than those of individual colloid transport. Since both plastic particles and iron oxides are ubiquitous presence in natural environment, it is expected that they would interact with each other and thus alter the surface properties, leading to the change of transport behaviors in porous media.
URI
https://pubs.acs.org/doi/10.1021/acs.est.8b06904https://repository.hanyang.ac.kr/handle/20.500.11754/165595
ISSN
0013-936X; 1520-5851
DOI
10.1021/acs.est.8b06904
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > EARTH RESOURCES AND ENVIRONMENTAL ENGINEERING(자원환경공학과) > Articles
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