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Article

Influence of Physicochemical Properties and Parent Material on Chromium Fractionation in Soils

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Area of Soil Science and Agricultural Chemistry, Department of Plant Biology and Soil Science, Faculty of Sciences, University of Vigo, Campus As Lagoas s/n, 32004 Ourense, Spain
2
CITACA Agri-food Research and Transfer Cluster of the Water Campus, University of Vigo, 32004 Ourense, Spain
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Department of Agricultural Engineering, Technical University of Cartagena, Paseo Alfonso XIII, 48, 30203 Cartagena, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Juan Francisco García Martín
Processes 2021, 9(6), 1073; https://doi.org/10.3390/pr9061073
Received: 18 May 2021 / Revised: 10 June 2021 / Accepted: 17 June 2021 / Published: 20 June 2021
(This article belongs to the Special Issue Soil and Sustainable Development: Challenges and Solutions)
Chromium is an element that possess several oxidation states and can easily pass from one to another, so its behavior in soils is very complex. For this reason, determining its fate in the environment can be difficult. In this research work we tried to determine which factors affect the chromium fractionation in natural soils, conditioning chromium mobility. We paid special attention to the parent material. For this purpose, extraction experiments were carried out on spiked soils incubated for 50–60 days, using H2O, CaCl2 and diethylenetriaminepentaacetic acid (DTPA). The most efficient extraction rate in all soils was achieved using water, followed by CaCl2 and DTPA. We obtained models with an adjusted R2 of 0.8097, 0.8471 and 0.7509 for the H2O Cr, CaCl2 Cr and DTPA Cr respectively. All models were influenced by the amount of chromium added and the parent material: amphibolite and granite influenced the amount of H2O Cr extracted, and schist affected the other two fractions (CaCl2 and DTPA). Soil texture also played an important role in the chromium extraction, as well as the amounts of exchangeable aluminum and magnesium, and the bioavailable phosphorus. We concluded that it is possible to make relatively accurate predictions of the behavior of the different Cr fractions studied, so that optimized remediation strategies for chromium-contaminated soils can be designed on the basis of a physicochemical soil characterization. View Full-Text
Keywords: heavy metal; modeling; predict; spiking; extraction; H2O; CaCl2; DTPA heavy metal; modeling; predict; spiking; extraction; H2O; CaCl2; DTPA
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MDPI and ACS Style

Campillo-Cora, C.; Rodríguez-González, L.; Arias-Estévez, M.; Fernández-Calviño, D.; Soto-Gómez, D. Influence of Physicochemical Properties and Parent Material on Chromium Fractionation in Soils. Processes 2021, 9, 1073. https://doi.org/10.3390/pr9061073

AMA Style

Campillo-Cora C, Rodríguez-González L, Arias-Estévez M, Fernández-Calviño D, Soto-Gómez D. Influence of Physicochemical Properties and Parent Material on Chromium Fractionation in Soils. Processes. 2021; 9(6):1073. https://doi.org/10.3390/pr9061073

Chicago/Turabian Style

Campillo-Cora, Claudia, Laura Rodríguez-González, Manuel Arias-Estévez, David Fernández-Calviño, and Diego Soto-Gómez. 2021. "Influence of Physicochemical Properties and Parent Material on Chromium Fractionation in Soils" Processes 9, no. 6: 1073. https://doi.org/10.3390/pr9061073

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