Minerals in Soil Environments

Dixon, J. B.; Weed, S. B.; Parpitt, R. L.

doi:10.1097/00010694-199008000-00011

Cited by 176 publications

(237 citation statements)

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“…This value was considerably lower than the value for coarser solids, which ranged from 2.3 to 2.7. The values of silica to alumina ratio for finer solids is in the same range as reported for kaolinite and allophanes [30,31]. The presence of silica minerals of quartz and muscovite in coarser fraction accounts for the higher silica to alumina ratio values for these solids.…”

Section: Physicochemical Characterizationsupporting

confidence: 76%

Characterization of sol–gel-derived nano-particles separated from oil sands fine tailings

Majid

Argue

Boyko

et al. 2003

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Methodology has been developed to separate nano-particles of amorphous material from Syncrude fine tailings. Both, separated finer solids and residual coarser solids, were characterized by elemental analysis, X-ray powder diffraction, XPS, SEM, infrared spectroscopy, solid-state NMR, density, and surface area measurements. Based on the results of infrared and X-ray diffraction, the amorphous minerals identified in finer solids included allophanes, halloysite, ferrihydrite, and amorphous silica. The finer fraction also contained some crystalline material consisting of muscovite and traces of quartz. The residual coarser solids consisted mostly of quartz, muscovite, and kaolinite. #

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Section: Physicochemical Characterizationsupporting

confidence: 76%

Characterization of sol–gel-derived nano-particles separated from oil sands fine tailings

Majid

Argue

Boyko

et al. 2003

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…Os argilominerais caulinita, montmorilonita e vermiculita apresentam estrutura e adsorção de mo- léculas de água diferentes (Dixon & Weed, 1977), e atuam diferenciadamente na banda em 1900 nm (Demattê et al, 1998d). Os solos Al e Li apresentaram vermiculita e micas em sua composição, detectada pelos difratogramas de raios-X, enquanto o PE, LR e LE, não.…”

Section: Resultados E Discussão Caracterização Espectral Dos Solosunclassified

Avaliação espectral de solos desenvolvidos em uma toposseqüência de diabásio e folhelho da região de Piracicaba, SP

Demattê

Campos

Alves

2000

Pesq. agropec. bras.

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RESUMO -Este trabalho teve como objetivo estudar as alterações de solos desenvolvidos numa toposseqüência composta por diabásio e folhelho (Piracicaba, SP), e sua relação com os dados espectrais. Ocorrem na toposseqüência os solos Latossolo Roxo (LR), Latossolo Vermelho-Escuro (LE), Podzólico Vermelho-Escuro (PE), Litossolo (Li) e Aluvial (Al) dos quais foram coletadas amostras a três profundidades. Foram obtidos dados de reflectância bidirecional dessas amostras em laboratório com espectrorradiômetro na faixa de 350 a 2.500 nm. As alterações da reflectância das amostras de solo das camadas superficiais e subsuperficiais foram relacionadas às diferenças nos teores de matéria orgânica e argila, que foram parâmetros importantes na caracterização espectral dos solos. Ao longo da toposseqüência, ocorreram alterações nas características dos solos, principalmente nos teores de ferro e silte e na mineralogia, que influenciaram nos dados espectrais. Os solos desenvolvidos de diabásio apresentaram altos teores de ferro, o que refletiu em concavidades mais acentuadas nas curvas espectrais em 850 nm, e intensidades de reflectância menores, ao contrário dos solos desenvolvidos de folhelho. A reflectância do PE apresentou-se mais intensa do que o LR e LE. Os solos menos intemperizados Li e Al apresentaram intensidades de reflectância mais elevadas que os mais intemperizados, LR e LE.Termos para indexação: sensoriamento remoto, radiometria, reflectância, intemperismo. SPECTRAL REFLECTANCE OF SOILS DEVELOPED ON A TOPOSEQUENCE OF DIABASE AND SHALE IN PIRACICABA, SP, BRAZILABSTRACT -The objective of the present research was to study the spectral reflectance of soils developed on a toposequence composed by diabase and shale, in Piracicaba region, São Paulo State, Brazil. Soil samples were collected at three depths along a transection, as they were, Typic Haplorthox (TH), Rhodic Paleudult (RP), Lithic Distrochrept (L) and Typic Fluvent (TF). Bidirectional spectral reflectance factors of the soil samples were obtained by using a spectroradiometer from 350 to 2,500 nm in laboratory conditions. Spectral alterations observed between the surface and subsurface layers were related to their organic matter and clay content differences; and these soil parameters were important on the spectral characterization of the soils. Along the toposequence, alterations on the soil characteristics occurred, mainly on iron, silt and mineralogy, that influenced variations of the spectral data. Soils developed by diabase presented higher content of iron, that influenced the spectral curve, with a deeper concavity shape at 850 nm, and lower reflectance intensity, differently of the soils developed by shale. The spectral curves of RP presented higher reflectance intensities from TH. The less weathered soils, L and TF, presented higher reflectance intensity than the more weathered soil, TH.Index terms: remote sensing, meteorological instruments, weathering. INTRODUÇÃOUma nação moderna necessita dispor de informações adequadas a respeito dos complexos aspec...

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“…According to Marshman and Marshall [37], clay acts as an absorption sink for organic material. Increase in organic fraction, with the increase in clay, can also be due to the fact that organic complexes being absorbed onto the clay surface, are being physically protected against decomposition [38,39], which lead to an accumulation of soil organic carbon level, with respect to age of mine overburden. Organic carbon, in association with the primary soil particles, is reported to promote macro aggregation [16,40].…”

Section: Parametersmentioning

confidence: 99%

Physico-Chemical Characterization and Mine Soil Genesis in Age Series Coal Mine Overburden Spoil in Chronosequence in a Dry Tropical Environment

Maharana¹

2013

J Phylogen Evolution Biol

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A pre-requisite to any revegetation plan, as well as restoration of degraded land is the knowledge of physicochemical characterization, which is crucial for prediction of ecological succession for mine overburden spoil, including soil texture, hydrological regimes, pH, organic carbon, nitrogen and extractable phosphorous. Effects of mining activities are markedly adverse, because many of the beneficial soil characteristics may require a long span of time to develop through pedogenic processes, in order to reach the native forest soil condition, which evaluates the degree of functional microbial processes for ecosystem recovery, and used as an index of the progress of soil genesis in mine overburden spoil. Mine spoil samples collected from six different age series overburdens showed progressive increase in clay (%) (r=0.982, p<0.001), water holding capacity and organic carbon, which indicates the development of soil structural stability, aggregation with the increase in age of overburden spoil. The pH of spoil samples was noted to be in acidic range (6.11-6.87). Approximately, 93.7% variability in clay (%) among different mine spoils can be explained due to the variation in organic carbon. The organic carbon, nitrogen and phosphorous content showed an improvement of 2 mg C/g spoil, 161 µg N/g spoil and 8 µg P/g spoil, respectively, over a period of 10 years. Thus, the net annual accumulation rate for carbon, nitrogen and phosphorous on hectare basis amounted to 255 kg C/ha/yr, 20 kg N/ha/ yr and 1 kg P/ha/yr, respectively. Further, it was estimated that the mine overburden spoil to attain the soil features of nearby native forest soil at study site through the process of reclamation, shall take approximately 28 years.

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Minerals in Soil Environments

Cited by 176 publications

References 0 publications

Characterization of sol–gel-derived nano-particles separated from oil sands fine tailings

Characterization of sol–gel-derived nano-particles separated from oil sands fine tailings

Avaliação espectral de solos desenvolvidos em uma toposseqüência de diabásio e folhelho da região de Piracicaba, SP

Physico-Chemical Characterization and Mine Soil Genesis in Age Series Coal Mine Overburden Spoil in Chronosequence in a Dry Tropical Environment

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