Prediction of Soil Clay Content and Cation Exchange Capacity Using Visible Near-Infrared Spectroscopy, Portable X-ray Fluorescence, and X-ray Diffraction Techniques

2021 ◽  
Vol 55 (8) ◽  
pp. 4629-4637
Author(s):  
Yuting Chen ◽  
Shibo Gao ◽  
Edward J. Jones ◽  
Balwant Singh
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Cation Exchange Capacity ◽  
Near Infrared ◽  
Clay Content ◽  
Exchange Capacity ◽  
X Ray Diffraction ◽  
X Ray ◽  
Soil Clay ◽  
Soil Clay Content

Alteration of smectites induced by hydrolytic exchange

Clay Minerals ◽  
2005 ◽  
Vol 40 (1) ◽  
pp. 15-24 ◽  
Author(s):  
S. Ramirez ◽  
D. Righi ◽  
S. Petit
Keyword(s):  
Infrared Spectroscopy ◽  
Cation Exchange ◽  
Cation Exchange Capacity ◽  
Relative Increase ◽  
Exchange Capacity ◽  
Capacity Analysis ◽  
Soluble Salts ◽  
X Ray Diffraction ◽  
X Ray ◽  
Mixed Layers

AbstractHydrolytic exchange was performed experimentally on four smectitic clays to evaluate the extent of clay alteration induced by this process and the associated ‘auto-transformation’ of H+ clays. Clay samples were Na-saturated and submitted to 10, 50 and 100 wetting-drying (WD) cycles and characterized after treatment using X-ray diffraction (XRD), infrared spectroscopy (FTIR) and cation exchange capacity analysis. Evidence for hydrolytic exchange was given by increasing amounts of exchangeable Mg2+ and precipitation of Na soluble salts for samples subjected to 100 WD cycles. Results indicated a decrease in the interlayer charge after 10 WD cycles but no further decrease was observed after 50 and 100 WD cycles. For one sample, XRD data indicated a decrease in the proportion of the smectite phase and a relative increase in the concentration of illite-smectite mixed layers also present in the sample. The results suggested that the reaction induces first a decrease in the layer charge and then a partial dissolution of some smectite layers.

Intercalation of N-methylformamide in kaolinite: In situ monitoring by near-infrared spectroscopy and X-ray diffraction

2021 ◽  
Vol 212 ◽  
pp. 106209
Author(s):  
Fevronia T. Andreou ◽  
Barbara Barylska ◽  
Zuzanna Ciesielska ◽  
Marek Szczerba ◽  
Arkadiusz Derkowski ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
In Situ Monitoring ◽  
X Ray Diffraction ◽  
X Ray

Using the NIRS for analyzes of soil clay content

2020 ◽  
Author(s):  
Clémence Mariage ◽  
Gilles Colinet ◽  
Valérie Genot
Keyword(s):  
Near Infrared ◽  
Clay Content ◽  
Exchange Capacity ◽  
Simultaneous Estimation ◽  
Near Infrared Reflectance ◽  
Available Nutrients ◽  
Soil Clay ◽  
Cationic Exchange ◽  
Soil Clay Content ◽  
Non Destructive

<p>REQUASUD network (based in Wallonia, Belgium) consists of laboratories working directly with farmers, giving them soil fertility diagnostics and advice for a good management of soils and cultures. Therefore, the laboratories analyze, among others, available nutrients. But they need more information to correctly interpret the results and give fertility advice, like the cationic exchange capacity (CEC) and the clay content. However, analyzing CEC and clay content is expensive, time-consuming and requires the use of chemicals. To overpass this problem, the near-infrared reflectance spectroscopy (NIRS) has been developed and is now used routinely in the laboratories. This method is rapid, non-destructive and allows the simultaneous estimation of soil characteristics. Nowadays, the REQUASUD NIR database performances for clay content are the followings : RPD = 2,22% for cultures and RPD = 1,72% for grasslands. This method of analysis can be used for other purposes than fertility advice.</p>

scholarly journals Near-infrared spectroscopy of faint discrete X-ray point sources constituting the Galactic ridge X-ray emission

2016 ◽  
Vol 68 (4) ◽  
pp. 57 ◽  
Author(s):  
Kumiko Morihana ◽  
Masahiro Tsujimoto ◽  
Pierre Dubath ◽  
Tessei Yoshida ◽  
Kensuke Suzuki ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Point Sources ◽  
X Ray

Soil subgroup prediction via portable X-ray fluorescence and visible near-infrared spectroscopy

Geoderma ◽  
2020 ◽  
Vol 365 ◽  
pp. 114212 ◽  
Author(s):  
Lucas Benedet ◽  
Wilson Missina Faria ◽  
Sérgio Henrique Godinho Silva ◽  
Marcelo Mancini ◽  
Luiz Roberto Guimarães Guilherme ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
X Ray
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