Study of Reflectance Spectroscopy in River Sediments

Ismael L. Schneider, Elba C. Teixeira, Silvia B.A. Rolim, Bachir Hallouche

Abstract


In the present study, Sinos River basin sediments of south Brazil were characterized using reflectance spectroscopy in 350-2500 nm range. This basin is located in an industrialized and densely populated area. The results focus on the influence of aluminum and iron content, particle size, organic matter, and mineral composition in the sediment samples. Fe and Al concentrations were determined by X-ray fluorescence. Clay minerals were determined by an X-ray diffractometer and reflectance spectral curves with a high-resolution spectroradiometer ASD Field Spec. Results of the mineralogical analyses showed that quartz, kaolinite, and smectite are scattered over the entire basin for most of the studied sites. Higher reflectance was observed for the samples after removal of the organic matter, indicating features associated with clay mineral and Fe. Likewise, higher reflectance was observed for the smaller size fraction, indicating the influence of mud in the spectral albedo. At the 2200 nm wavelength, the Al-OH bond of clay mineral was detected in the spectra. This was associated with Al content. Features due to the presence of iron oxides were observed between 470-580 nm and 650-850 nm.


Keywords


Clay Minerals; Reflectance Spectroscopy; Sediments; Sinos River

Full Text: PDF

Refbacks

  • There are currently no refbacks.


Bookmark and Share


Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.

*2016 Journal Impact Factor was established by dividing the number of articles published in 2014 and 2015 with the number of times they are cited in 2016 based on Google Scholar, Google Search and the Microsoft Academic Search. If ‘A’ is the total number of articles published in 2014 and 2015, and ‘B’ is the number of times these articles were cited in indexed publications during 2016 then, journal impact factor = A/B. To know More: (http://en.wikipedia.org/wiki/Impact_factor)