Determination of heavy metals in soils using diffuse reflectance spectroscopy: a case study in Northern Greece

George Galanis; Dimitris Gkoutzikostas; Vasilis Rousonikolos; Nikoletta Tiliopoulou; Argyro Papastergiou; Kostas Karyotis; George Zalidis

doi:10.1117/12.2683122

21 September 2023 Determination of heavy metals in soils using diffuse reflectance spectroscopy: a case study in Northern Greece

George Galanis, Dimitris Gkoutzikostas, Vasilis Rousonikolos, Nikoletta Tiliopoulou, Argyro Papastergiou, Kostas Karyotis, George Zalidis

Author Affiliations +

Proceedings Volume 12786, Ninth International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2023); 127861J (2023) https://doi.org/10.1117/12.2683122
Event: Ninth International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2023), 2023, Ayia Napa, Cyprus

Abstract

Industrialization and intense human activity affect soil ecosystem, and as a result of heavy metal contamination, its physicochemical and biological activities are disturbed. To safeguard soil capital, prevention and monitoring strategies need to be introduced, but taking into consideration the induced costs, in terms of time, effort and money. Diffuse reflectance spectroscopy is proven to be a rapid and inexpensive method for the determination of various chemical compounds found in soil, including heavy metals. We collected 64 soil samples from an area of 10km2 at the western part of Thessaloniki, Greece, which is known to be degraded due to heavy industrial activity. The samples were analyzed at the accredited chemical laboratory of the InterBalkan Environment Center for the determination of two (Cadmium, Lead,) heavy metals (DTPA extraction with the use of Atomic Absorption Spectroscopy AAS). In parallel the soil samples were also spectroscopically analyzed, aiming to construct a regional soil spectral library that can be used as a dataset for fitting Machine Learning models for the quantification of land degradation through the determination of heavy metal concentration. Aspiring to reduce the laboratory procedure, we resampled the spectrum to the bands captured by a recently launched hyperspectral mission, providing a proof of concept regarding the monitoring of soil contamination by heavy metals by analyzing spaceborne hyperspectral data.

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George Galanis, Dimitris Gkoutzikostas, Vasilis Rousonikolos, Nikoletta Tiliopoulou, Argyro Papastergiou, Kostas Karyotis, and George Zalidis "Determination of heavy metals in soils using diffuse reflectance spectroscopy: a case study in Northern Greece", Proc. SPIE 12786, Ninth International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2023), 127861J (21 September 2023); https://doi.org/10.1117/12.2683122

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KEYWORDS

Metals

Soil contamination

Cadmium

Lead

Soil science

Data modeling

Contamination

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