Results 131 to 140 of about 1,972 (183)
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Adsorption and desorption of arsenic on an oxisol and its constituents
Water Research, 2004The present work investigates the adsorption and mobility (desorption) of As(III) and As(V) on an oxisol, and its main mineral constituents, as part of a broader project aimed at selecting a soil liner to be used in tailings dams at a sulfidic gold ore plant.
Ana C Q, Ladeira +1 more
exaly +3 more sources
Fate and distribution of 14C-atrazine in a tropical oxisol
Chemosphere, 2000The herbicide atrazine is the most commonly detected pesticide in groundwater world-wide. A new microcosm test-system was used to determine the fate of 14C-atrazine in a Brazilian oxisol. 14C Ring-labelled atrazine was applied in a mixture with the commercial product Gesaprim 500 (Novartis) at a rate of 3 kg ha-1.
Reiner Schroll, Tomaz Langenbach
exaly +3 more sources
Evaluation of mercury phytoavailability in Oxisols
Environmental Science and Pollution Research, 2018Mercury is a metal which is potentially toxic for the environment. Many factors control its retention in the soil, such as cation exchange capacity, pH, clay content, organic matter, and redox potential. It is important to know the phytotoxic effects of soil Hg to prevent environmental contamination and its entry into the food chain. Several analytical
Lima, Francielle Roberta Dias de +9 more
openaire +2 more sources
2015
Landscapes associated with Oxisols and Ultisols in Taiwan are stable and old, measured in hundred thousands of years, and the thickness can be up to 5 m. Plinthite may be present resulted from alternative wet and dry cycles by fluctuating water tables.
Zueng-Sang Chen +2 more
openaire +1 more source
Landscapes associated with Oxisols and Ultisols in Taiwan are stable and old, measured in hundred thousands of years, and the thickness can be up to 5 m. Plinthite may be present resulted from alternative wet and dry cycles by fluctuating water tables.
Zueng-Sang Chen +2 more
openaire +1 more source
Monovalent Ion Adsorption by an Oxisol
Soil Science Society of America Journal, 1987Abstract An experimental method was developed to measure simultaneously the net proton surface charge density (σ H ) and surface excesses of metal ( n M ) and ligand ( n L
Laurent Charlet, Garrison Sposito
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57Fe Mössbauer studies of oxisols
Hyperfine Interactions, 1991Mossbauer spectroscopy is a valuable complement to the standard analytical techniques of soil science for characterizing the iron content of soils, and for studying the mineralogical transformations that occur during pedogenesis from the point of view of the iron.
J. M. D. Coey +2 more
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Mössbauer analysis of Brazilian Oxisols
Hyperfine Interactions, 1986Three sets of Brazilian Oxisols have been analysed by Mossbauer spectroscopy at 290, 80 and 4.2 K. In most cases two resolved magnetic hyperfine patterns associated with aluminous goethite and hematite are resolved; their ratio is related to soil colour. Samples from a 3 m soil profile show that both oxides become decreasingly aluminium substituted and/
J. D. Fabris +3 more
openaire +1 more source
1983
Publisher Summary The taxon of Oxisols contains intensively weathered soils, most of which occur in tropical or subtropical regions. As a rule, they are found on old land surfaces or in sediments that are derived from them, although they may also form in rapidly weathering materials.
A. Van Wambeke +3 more
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Publisher Summary The taxon of Oxisols contains intensively weathered soils, most of which occur in tropical or subtropical regions. As a rule, they are found on old land surfaces or in sediments that are derived from them, although they may also form in rapidly weathering materials.
A. Van Wambeke +3 more
openaire +1 more source
Positive Permanent Charge in Oxisols
Soil Science Society of America Journal, 1982Abstract The existences of a positive permanent charge can be inferred from charge characteristics of highly weathered tropical soils; it was found to be related to isomorphous substitution of Ti(IV) for Fe(III) in iron oxides. Comparable near‐constant values were found from anion adsorption at pH 7.0 to 9.0.
Tessens, E., Zauyah, Siti
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Bivalent Ion Adsorption by an Oxisol
Soil Science Society of America Journal, 1989Abstract Surface excesses of the bivalent ions Ca 2+ , Mg 2+ , and SO 2‐ 4 were measured on a Brazilian Oxisol suspended in Ca(ClO 4 )
Charlet, Laurent, Sposito, Garrison
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