Rapid and fully automated measurement of water vapor sorption isotherms: New opportunities for vadose zone research

Emmanuel Arthur, Markus Tuller, Per Moldrup, Lis Wollesen De Jongz

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Eminent environmental challenges such as remediation of contaminated sites, the establishment and maintenance of nuclear waste repositories, or the design of surface landfill covers all require accurate quantification of the soil water characteristic (SWC) at low water contents. Furthermore, several essential but difficult-to-measure soil properties, including clay content and specific surface area, are intimately related to water vapor sorption. Until recently, it was a major challenge to measure detailed water vapor sorption isotherms accurately within a reasonable time frame. This priority communication illustrates potential applications of a new, fully automated, and rapid Vapor Sorption Analyzer (VSA) to pertinent issues in vadose zone research. Detailed vapor sorption isotherms for 25 variably textured soils were measured with the VSA within 1 to 3 d. Links between generated isotherms and pesticide volatilization, toxic organic vapor sorption kinetics, and soil water repellency are illustrated. Several methods to quantify hysteresis effects and to derive soil clay content and specific surface area from VSA-measured isotherms are presented. Besides above mentioned applications, potential relationships to percolation threshold for solute diffusion in unsaturated soil and to soil cation exchange capacity are discussed to stimulate new and much-needed vadose zone research.

Original languageEnglish (US)
JournalVadose Zone Journal
Volume13
Issue number1
DOIs
StatePublished - Jan 2014

Fingerprint

vadose zone
sorption isotherms
water vapor
vapors
sorption
isotherm
surface area
soil
soil water characteristic
hysteresis
landfills
soil water
volatilization
cation exchange capacity
remediation
clay soils
solutes
infiltration (hydrology)
soil properties
pesticides

ASJC Scopus subject areas

  • Soil Science

Cite this

Rapid and fully automated measurement of water vapor sorption isotherms : New opportunities for vadose zone research. / Arthur, Emmanuel; Tuller, Markus; Moldrup, Per; De Jongz, Lis Wollesen.

In: Vadose Zone Journal, Vol. 13, No. 1, 01.2014.

Research output: Contribution to journalArticle

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