Increases in Ca/Mg ratios caused the increases in the mobile fractions of Cr and Ni in serpentinite-derived soils in humid Asia

Serpentinite-derived soils are characterized by low Ca/Mg ratio and abnormally high Cr and Ni concentrations due to the geogenic sources. The breakdown of parent materials during pedogenesis may lead to the changes in both Ca/Mg ratios and fractions of Cr and Ni. This study hypothesized that total C...

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Bibliographic Details
Main Authors: C.Y.Yang, D.Q.Nguyen, H.T.T.Ngo
Format: Bài trích
Language:English
Published: Elsevier 2022
Subjects:
Online Access:https://www.sciencedirect.com/science/article/abs/pii/S0341816222004040?via%3Dihub
https://dlib.phenikaa-uni.edu.vn/handle/PNK/5980
https://doi.org/10.1016/j.catena.2022.106418
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Summary:Serpentinite-derived soils are characterized by low Ca/Mg ratio and abnormally high Cr and Ni concentrations due to the geogenic sources. The breakdown of parent materials during pedogenesis may lead to the changes in both Ca/Mg ratios and fractions of Cr and Ni. This study hypothesized that total Ca/Mg (Cat/Mgt) and exchangeable Ca/Mg (Cae/Mge) ratios increase with soil development, associated with the increases in potentially mobile fractions (PMFs) of Cr and Ni. Thirty-five soil horizon samples of eight pedons from Japan, Taiwan, Philippines, and Vietnam were collected, and the exchangeable concentrations of Ca and Mg were measured.