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CBD method

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Journal Article
Published: 01 April 2002
Clays and Clay Minerals (2002) 50 (2): 208–216.
... agent as hematite, was mixed in concentrations that ranged from 0 to 2.0 wt.%. Loess and paleosol samples were deferrated by the CBD method for removing pedogenic Fe oxides from clays ( Mehra and Jackson, 1960 ; Verosub et al. , 1993 ; Fine et al. , 1995 ; Hunt et al. , 1995 ). Samples were...
FIGURES
Journal Article
Published: 01 June 2016
Bulletin of Canadian Petroleum Geology (2016) 64 (2): 354–361.
... ATP), bacterial activity (using Bart testers), community identification (using RASI-MIDI), application of the penetrant CBD (to disperse colloidal biomass), and the generation of bioelectricity by the intrinsic biomass. For ATP activity it was found that all of the oil sand samples tested had some...
FIGURES
Journal Article
Published: 17 April 2018
Bulletin of the Seismological Society of America (2018) 108 (3A): 1171–1184.
... earthquake, and on a kinematic dislocation model. The effect of the rotational wavefield on tall buildings is finally investigated. As an illustration, we evaluate the response, in terms of interstory drift, of the Grand Chancellor Hotel, the tallest building in the central business district (CBD...
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Journal Article
Published: 01 December 2010
Clays and Clay Minerals (2010) 58 (6): 772–782.
... sedimentation and sieving methods ( Gee and Bauder, 1986 ). The clay (<0.002 mm) fractions from texture analysis were reserved, and splits of the clay fraction were extracted separately using ammonium oxalate in the dark (AOD) and citrate-bicarbonate-dithionite (CBD) ( Jackson et al. , 1986 ). Samples...
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Journal Article
Published: 01 April 2006
Clays and Clay Minerals (2006) 54 (2): 266–273.
... to dissolve the carbonates in samples. Then we used the citrate-bicarbonate-dithionite (CBD) method ( Mehra and Jackson, 1960 ) to eliminate the free Fe oxides. Samples were extracted twice with Na dithionite in a hot (75°C) Na citrate and Na bicarbonate solution to ensure complete removal of pedogenic Fe...
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Journal Article
Published: 01 October 2010
Clays and Clay Minerals (2010) 58 (5): 707–716.
... to its short-range order, allophane cannot be quantified by powder X-ray diffraction (XRD) directly. It is commonly dissolved from the soil by applying extraction methods. In the present study the standard extraction method (oxalate) was judged to be unsuitable for the quantification of allophane...
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Journal Article
Journal: Clay Minerals
Published: 01 September 2000
Clay Minerals (2000) 35 (4): 625–634.
... al. , 1996 , and Ernstsen et al. , 1998 ). The most effective chemical reduction method, leading to >90% reduction of Fe(III) to Fe(II) in nontronites, is the citrate-bicarbonate-dithionite (CBD) method. The CBD method uses sodium dithionite as a reducing agent in a buffer solution containing...
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Series: Clay Minerals Society Workshop Lectures
Published: 01 January 2002
DOI: 10.1346/CMS-WLS-11.7
EISBN: 9781881208310
... Improved laboratory performance. 2 Reduction in errors and abuse of equipment. 3 Graphical methods (and others) can be directly incorporated for the interpretation of data. 4 Students may study and review methods prior to the start of a laboratory session. 5 Flexible, individualized scheduling...
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Journal Article
Published: 01 April 2013
Bulletin of the Seismological Society of America (2013) 103 (2A): 1085–1102.
... ground shaking, this validation study assesses the national site classification map of Australia, which has been developed for application in first‐order earthquake hazard and risk assessment. In the absence of regolith thickness and fundamental period data, site classes are assigned based on a method...
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Journal Article
Published: 01 October 2013
American Mineralogist (2013) 98 (10): 1834–1847.
... of the saponite sample was first separated by centrifugation. Then, it was treated with 0.1 M acetic acid in 0.5 M NaCl solution to remove carbonates. After washing with 0.5 M NaCl, the solid was treated for the removal of iron oxide and (oxy)hydroxides using a citrate-bicarbonate-dithionite method (CBD) adapted...
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Series: Geological Society, London, Special Publications
Published: 01 January 2006
DOI: 10.1144/GSL.SP.2006.266.01.13
EISBN: 9781862395145
..., a number of environmental protection policies address soil-protection aspects, like the climate-change convention, the biodiversity convention and the desertification convention. Further development of the EU Thematic Strategy for Soil Protection will make it possible to explore new methods...
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Journal Article
Published: 01 May 2009
Quarterly Journal of Engineering Geology and Hydrogeology (2009) 42 (2): 157–164.
... these carbonaceous mudstones are studied to determine their potential to expand and damage civil infrastructure. Methods of characterizing the expansion potential of pyritic mudstone are scrutinized in an effort to advance the current state-of-practice for geotechnical and geological investigations. Observational...
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Journal Article
Journal: Interpretation
Published: 28 September 2018
Interpretation (2018) 6 (4): SM39–SM50.
... and processing methods have been used to improve the imaging quality of piedmont seismic data since 2000. Some improvements have been achieved: The reflection waves from the far offset and deep layer can be acquired in shot gathers from limestone outcropped areas, and the signal-to-noise ratio (S/N...
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Journal Article
Journal: GSA Bulletin
Published: 01 May 2015
GSA Bulletin (2015) 127 (5-6): 862–878.
... and in situ results indicates that upper- and mid-slope positions are consistent with steady, uniform lowering of the landscape. In addition to comparing the two methods, we develop a one-dimensional analytical model for the 10 Be concentration fields on an active, steady-state catena with uniform erosion. We...
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Journal Article
Published: 01 January 2018
American Mineralogist (2018) 103 (1): 109–124.
... and Al with the dithionitecitrate-bicarbonate and ammonium oxalate methods, and Fourier-transform infrared analysis. The soil fabric and mineralogy were compatible with derivation from sandstone rock. Clasts of heterogeneous mineral composition as well as loose material from disaggregated clasts were...
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Journal Article
Published: 01 November 2011
Seismological Research Letters (2011) 82 (6): 882–892.
...Eleni Smyrou; Panagiota Tasiopoulou; Ïhsan Engin Bal; George Gazetas Figure 2. ▴ Observed polarity for the records in the CBD in terms of peak ground acceleration, velocity, and displacement. The contours of PGA on the map were computed by interpolation using all records in Christchurch...
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Journal Article
Published: 01 April 2010
Clays and Clay Minerals (2010) 58 (2): 164–173.
.... The actual percentages of Al and Fe in the resulting pillars or within the clay interlayers were not determined but were assumed to be relatively similar. Sub-samples were treated by the oxalate or citrate-bicarbonate-dithionite (CBD) method. In the former, 0.250 g of clay was extracted with a mixture...
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Journal Article
Published: 01 August 2010
Journal of Sedimentary Research (2010) 80 (8): 763–769.
...) this process also oxidized most of the disseminated diagenetic pyrite to iron oxide ( Fig. 2B, D ), which enabled their subsequent dissolution using the citrate–bicarbonate–dithionite (CBD) method, originally described by Mehra and Jackson (1960) and later modified by Rea and Janecek (1981) . Alternatively...
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Journal Article
Published: 01 November 2011
Seismological Research Letters (2011) 82 (6): 905–918.
... of Christchurch CBD and its environs is shown in Figure 1 . Most of the city was mainly swamp behind sand dunes, and estuaries and lagoons that have now been drained ( Brown et al. 1995 ). The surface geology of the greater Christchurch area consists of predominantly recent Holocene (<11,700 years old...
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Journal Article
Journal: Clay Minerals
Published: 01 May 2016
Clay Minerals (2016) 51 (2): 129–144.
... at 105°C) and were reported as equivalent charges/kg of dry weight. Cation exchange capacity (CEC) was measured with the Cu(II)-triethylenetetramine method ( Meier & Kahr, 1999 ; Ammann et al. , 2005 ; Dohrmann et al. , 2012a ,b). 200 mg of air-dried ground bulk sample were dispersed in 25 mL...
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