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Journal article
Fate and Transport of Molybdenum Disulfide Nanomaterials in Sand Columns
Environmental engineering science, v 32(2), pp 163-173
01 Feb 2015
PMID: 25741176
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Research and development of two-dimensional transition metal dichalcogenides (TMDC) (e.g., molybdenum disulfide [MoS
2
]) in electronic, optical, and catalytic applications has been growing rapidly. However, there is little known regarding the behavior of these particles once released into aquatic environments. Therefore, an in-depth study regarding the fate and transport of two popular types of MoS
2
nanomaterials, lithiated (MoS
2
-Li) and Pluronic PF-87 dispersed (MoS
2
-PL), was conducted in saturated porous media (quartz sand) to identify which form would be least mobile in aquatic environments. The electrokinetic properties and hydrodynamic diameters of MoS
2
as a function of ionic strength and pH were determined using a zeta potential analyzer and dynamic light scattering techniques. Results suggest that the stability is significantly decreased beginning at 10 and 31.6 mM KCl, for MoS
2
-PL and MoS
2
-Li, respectively. Transport study results from breakthrough curves, column dissections, and release experiments suggest that MoS
2
-PL exhibits a greater affinity to be irreversibly bound to quartz surfaces as compared with the MoS
2
-Li at a similar ionic strength. Derjaguin–Landau–Verwey–Overbeek theory was used to help explain the unique interactions between the MoS
2
-PL and MoS
2
-Li surfaces between particles and with the quartz collectors. Overall, the results suggest that the fate and transport of MoS
2
is dependent on the type of MoS
2
that enters the environment, where MoS
2
-PL will be least mobile and more likely be deposited in porous media from pluronic–quartz interactions, whereas MoS
2
-Li will travel greater distances and have a greater tendency to be remobilized in sand columns.
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Details
- Title
- Fate and Transport of Molybdenum Disulfide Nanomaterials in Sand Columns
- Creators
- Jacob D. Lanphere - University of California, RiversideCorey J. Luth - University of California, RiversideLinda M. Guiney - Northwestern UniversityNikhita D. Mansukhani - Northwestern UniversityMark C. Hersam - Northwestern UniversitySharon L. Walker - University of California, Riverside
- Publication Details
- Environmental engineering science, v 32(2), pp 163-173
- Publisher
- Mary Ann Liebert, Inc
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- College of Engineering
- Web of Science ID
- WOS:000349322300010
- Scopus ID
- 2-s2.0-84923093266
- Other Identifier
- 991021229887604721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Engineering, Environmental
- Environmental Sciences