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Full-Text Articles in Soil Science
Desorption Hysteresis In Five Ion Exchanged Montmorillonites, Jerry Paul Fairley
Desorption Hysteresis In Five Ion Exchanged Montmorillonites, Jerry Paul Fairley
UNLV Theses, Dissertations, Professional Papers, and Capstones
It is generally believed that the formation of recalcitrant (slowly desorbing) fractions of volatile organic compounds (VOCs) in soils is due to diffusion of compounds to sorption sites inaccessible to bulk fluid. The exact nature of these sites, however, is not well understood. In clay minerals, researchers favor two probable areas for the storage of persistent contamination; sites between the clay lamella, or sites with clay particle aggregates.
To test the hypothesis that recalcitrant fractions are formed in interlamellar spaces, a Na/Ca Montmorillonite (Smectite) was ion exchanged with five different cations (K+, Na+, Ca+, …
Surficial Geology Of The Las Vegas Quadrangle, Nevada, Charles Edgar Price Jr
Surficial Geology Of The Las Vegas Quadrangle, Nevada, Charles Edgar Price Jr
UNLV Theses, Dissertations, Professional Papers, and Capstones
The Las Vegas 15-minute quadrangle, located in the south part of the state of Nevada, includes about 240 square miles in and around the city of Las Vegas; it is in the basin and range province. The quadrangle includes a broad valley floor that was once a lake bottom, a bordering area of badlands and rolling hills developed in Tertiary and Quaternary deposits, an outer marginal area of alluvial fans, and the surrounding mountains.
The mountains constitute about three per cent of the total land surface and are composed of rock ranging in are from Precambrian to Tertiary. The remainder …