Cited by 262Adsorption and biosorption for pollutant removalGroundwater flow and contamination studiesAdsorption, diffusion, and thermodynamic properties of materials

Adsorption-Partitioning Uptake of Nine Low-Polarity Organic Chemicals on a Natural Sorbent

Xia, Guoshou, Ball, William P.·1999·Environmental Science & Technology

Abstract

Sorption of comparatively nonpolar organic chemicals by natural solids not only can be predominated by partitioning with organic matter but also can reflect a substantial contribution from adsorption at low relative concentration. Sorption of nine polycyclic aromatic hydrocarbons (PAHs) and chlorinated benzenes (CBs) was investigated on a subsurface aquitard through batch study, with results interpreted by a composite adsorption-partitioning model. For both PAHs and CBs, the low-concentration adsorption slope and the coefficient for partitioning each correlated well with K ow; however, PAHs consistently sorbed more strongly than CBs at given K ow . For all chemicals, adsorption contributions were only important at low relative concentration and could be successfully modeled by assuming either Langmuir-type or Polanyi-type isotherms. Isotherms for all liquid chemicals fell on a single isotherm when plotted on a Polanyi basis (adsorbed volume per mass of sorbent versus adsorption potential density), providing evidence that a pore-filling phenomenon is involved. Adsorbed volumes of solid chemicals were observed to be less than those of liquids at the same adsorption potential density, consistent with a reduction in packing efficiency and as previously reported for activated carbons. These results suggest that the adsorption contribution is from pore filling within microporous solids.

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Crossref · 10.1021/es980581g

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  • The carbonized fraction is similar to the ''glassy'' fraction and the non-carbonized fraction is similar to the ''soft'' fraction.

    “The carbonized fraction is similar to the ''glassy'' fraction (analogous to glassy polymers), and the non-carbonized fraction is similar to the ''soft'' fraction (analogous to rubbery polymers) (Xia and Ball 1999).”

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Authors
Xia, G., & Ball, W. P.
Affiliations
Johns Hopkins University (US)
Venue
Environmental Science & Technology
Published
1998-12-05
Volume
33
Issue
2
Pages
262-269
ISSN
  • 0013-936X (ISSN-L)
  • 1520-5851
OpenAlex
W2024258880
Cited by
262
References
42
Citations by year
2026: 2 · 2025: 5 · 2024: 1 · 2023: 5 · 2022: 4 · 2021: 5 · 2020: 11 · 2019: 2 · 2018: 6 · 2017: 6 · 2016: 6 · 2015: 4 · 2014: 17 · 2013: 11 · 2012: 11
FWCI
11.80
Type
journal article
Language
en
Open access
closed
Locations
Environmental Science & Technology (publishedVersion)
Topics
  • Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
  • Physical Sciences › Environmental Science › Environmental Engineering › Groundwater flow and contamination studies
  • Physical Sciences › Chemistry › Spectroscopy › Adsorption, diffusion, and thermodynamic properties of materials
Keywords
polycyclic aromatic hydrocarbons, chlorinated benzenes, natural adsorbents, aquitard, octanol-water partition coefficient, Langmuir isotherm, pore filling, microporous materials, sorption modeling, subsurface contaminant transport

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