Polymer-clay composite geomedia for sorptive removal of trace organic compounds and metals in urban stormwater
Open accessAbstract
Functionalized polymer-clay composites were developed and characterized as engineered geomedia for trace contaminant removal during infiltration of urban runoff. Montmorillonite clays were functionalized with either poly(diallyldimethylammonium) chloride (PDADMAC) or poly(4-vinylpyridine-co-styrene) (PVPcoS) to enhance organic compound sorption using a simple, scalable synthesis method. Seven representative trace organic compounds and six trace metals were employed to assess the performance of the polymer-clay composites relative to biochar (i.e., an adsorbent proposed for similar purposes) in batch sorption and column studies under simulated stormwater conditions. Contaminant and geomedia electrostatic and hydrophobic interactions, and the presence of natural organic matter (NOM) affected sorption. In batch studies, polymer-clay composites exhibited similar performance to biochar for perfluoroalkyl substance removal, but had lower affinity for polar pesticides and tris(2-chloroethyl) phosphate. Oxyanion removal was greatest for positively-charged PDADMAC-clay composites (particularly Cr[VI]), while PVPcoS-clay composites removed over 95% of Ni, Cd, and Cu. NOM decreased removal of all organic compounds, but increased trace metal removal on clay composites due to sorption of NOM-complexed metals. Polymer-clay composite-amended columns best removed oxyanions, while biochar-amended columns exhibited superior removal for all trace organics. At 3 wt% geomedia-sand loading, clay c…
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Column tests have shown relatively inefficient PFAS removals with sand-based filter materials.
“A few column tests have shown relatively inefficient PFAS removals with sand-based filter materials”
From Occurrence, Concentration, and Distribution of 35 PFASs and Their Precursors Retained in 20 Stormwater Biofilters (2024) · cites this paper as [31]
Carbon-based sorbents including biochar and GAC are commonly used to treat heavy metals or PFAS in stormwater.
“Carbon-based sorbents in particular, including biochar and granular activated carbon (GAC), are commonly used to treat heavy metals or PFAS in stormwater,16–18 but are rarely studied to remove both broad classes of contaminants simultaneously.”
From Evaluation of sorbents and matrix effects for treating heavy metals and per- and polyfluoroalkyl substances as co-contaminants in stormwater (2023) · cites this paper as [16]
Carbon-based sorbents are rarely studied to remove both heavy metals and PFAS simultaneously.
“Carbon-based sorbents in particular, including biochar and granular activated carbon (GAC), are commonly used to treat heavy metals or PFAS in stormwater,16–18 but are rarely studied to remove both broad classes of contaminants simultaneously.”
From Evaluation of sorbents and matrix effects for treating heavy metals and per- and polyfluoroalkyl substances as co-contaminants in stormwater (2023) · cites this paper as [16]
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Fate and transport of per- and polyfluoroalkyl substances (PFASs) in the vadose zone
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Self-citationTeixidó, M., Charbonnet, J. A., LeFevre, G. H., Luthy, R. G., & Sedlak, D. L. (2022) · Water Research · doi:10.1016/j.watres.2022.119246 · Cited by 30 · see citing works
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- Authors
- Ray, J. R., Shabtai, I. A., Teixidó, M., Mishael, Y. G., & Sedlak, D. L.
- Affiliations
- University of Washington (US)
- Hebrew University of Jerusalem (IL)
- University of California, Berkeley (US)
- Corresponding author
- Sedlak, David L.
- Venue
- Water Research
- Publisher
- Elsevier BV
- Published
- 2019-06
- Volume
- 157
- Pages
- 454-462
- ISSN
- 0043-1354 (ISSN-L)
- OpenAlex
- W2933299050
- Cited by
- 101
- References
- 3
- Citations by year
- 2026: 7 · 2025: 18 · 2024: 15 · 2023: 13 · 2022: 13 · 2021: 12 · 2020: 18 · 2019: 5
- FWCI
- 5.09
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Water Research (acceptedVersion)
- PubMed (publishedVersion)
- Funders
- National Science Foundation
- Topics
- Physical Sciences › Environmental Science › Environmental Engineering › Urban Stormwater Management Solutions
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Engineering › Biomedical Engineering › Environmental remediation with nanomaterials
- Keywords
- polymer-clay composites, urban stormwater, trace organic contaminants, trace metals, sorption, montmorillonite, poly(diallyldimethylammonium chloride), biochar, perfluorinated compounds, oxyanion removal, natural organic matter, hydraulic conductivity, infiltration, tris(2-chloroethyl) phosphate, pesticides
- MeSH terms
- Clay, Adsorption, Metals, Organic Chemicals, Polymers, Silicon Dioxide
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