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Changes in water infiltration capacities following the application of a wetting agent on a ponderosa pine forest floorKaplan, Marc Gabriel, January 1973 (has links) (PDF)
Thesis (M.S. - Watershed Management)--University of Arizona. / Includes bibliographical references.
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Effects of sorption and desorption on bioavailbility of atrazine in soils amended with crop residue derived charLoganathan, Vijay Anand. Clement, Prabhakar. Feng, Yucheng. January 2006 (has links) (PDF)
Thesis(M.S.)--Auburn University, 2006. / Abstract. Includes bibliographic references.
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Effect of methods of wetting and rainfall characteristics on crusting and hardsetting of a red-brown earth /Gusli, Sikstus. January 1995 (has links) (PDF)
Thesis (Ph. D.)--University of Adelaide, Dept. of Soil Science, 1995. / Includes bibliographical references.
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Molecular modeling study of sulfate and phosphate adsorption at the mineral-water interfacePaul, Kristian W. January 2009 (has links)
Thesis (Ph.D.)--University of Delaware, 2007. / Principal faculty advisor: Donald L. Sparks, Dept. of Plant & Soil Sciences. Includes bibliographical references.
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West Virginia coal fly ash sorption of BTEXWentz, Jerome C. January 2004 (has links)
Thesis (M.S.)--West Virginia University, 2004. / Title from document title page. Document formatted into pages; contains vi, 93 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 47-52).
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The effects of soil organic matter heterogeneity on equilibrium sorption by soils and sediments /Xiao, Baohua. January 2004 (has links)
Thesis (Ph. D.)--Drexel University, 2004. / Includes abstract and vita. Includes bibliographical references (leaves 161-172).
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On the effect of soil oxidation-reduction potential and organic waste strength on the rate of clogging of a sandy soilFriess, Philip L. January 1980 (has links)
Thesis (M.S.)--University of Wisconsin--Madison. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 64-72).
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Instrumented permeable blankets for estimating subsurface hydraulic conductivity and confirming numerical models used for subsurface liquid injectionMukherjee, Moumita. January 2008 (has links)
Thesis (PH. D.)--Michigan State University. Civil Engineering, 2008. / Title from PDF t.p. (viewed on Sept. 2, 2009) Includes bibliographical references (p. 267-278). Also issued in print.
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Factors influencing natural attenuation of dinitrotoluenes in surface soils : badger army ammunition plants : a case studyTulsiani, Urvi Kotak. January 2005 (has links)
Thesis (M. S.)--Civil and Environmental Engineering, Georgia Institute of Technology, 2006. / Dr. Kurt Pennell, Committee Member; Dr. Jim Spain, Committee Member; Dr. Joseph Hughes, Committee Chair
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The removal of heavy metals from dilute aqueous streams by the use of ion exchange resinsDietrich, Theo Henry January 1998 (has links)
Thesis (MTech (Chemical Engineering)--Cape Technikon, Cape Town, 1998 / Ion exchange resins are widely used to remove or concentrate heavy metals
from aqueous solutions or slurries.This thesis attempts to properly evaluate
the interaction between ion exchange resins and heavy metals at trace metal
concentrations.The durability of the resins and their effectiveness in real
slurries were also investigated.
In this study, a chelating resin, as well as a cation, and anion exchange resin
was contacted with aqueous solutions of heavy metals in both free and
complexed form. Zinc, nickel and copper cyanide complexes were adsorbed
onto the anion exchange resin, while the chelating and cation exchange resins
were contacted with zinc and nickel nitrates, and cupric sulphate. All the tests
were conducted in batch stirred tank reactors.
All the metal cyanide complexes behaved in a similar manner when contacted
with the anion exchange resins. These tests were p~rf0nned under variations
in temperature, stirring speed, pH., ionic strength and . initial metal
90E~entrations. Fitting of a dual resistance model to the profiles for thetlptllk:e"
of the complexes, show that both film diffusion and intraparticle diffusion
rates were improved with an increase in temperature, and that film diffusion
rates improved with an increase in stirring speed. A high ionic strength
negatively affected equilibrium loading as well as diffusional rates.It was
found that at these low concentrations, the diffusional rates improves with a
decrease in the external metal concentration.
A comparative study involving the chelating and cation·exchange resins were
performed, during which the resins were contacted with the metals in free
fonn. It was found that at high metal concentrations, the chelating resin
induced a rate limiting effect, but at trace concentrations, this effect is
virtually negated. Whereas the cation exchange resin exhibited little
selectivity in adsorbing the metals, it was found that the chelating resin
prefers the metals in the eu > Ni > Zn. The chelating resin proved to be no
less durable then the cation exchange resin, and both slightly lost their ability
to adsorb the metal cations as a result of the effects of an inert coarse sand
slurry.Tests performed with a real ore leachate, showed the cation exchange
resin to be efficient at a low pH , but also relatively non selective, since the
adsorption of copper from the leachate was greatly reduced due to the
presence of other heavy metals.
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