TY - JOUR
T1 - Effects of ph-induced changes in soil physical characteristics on the development of soil water erosion
AU - Matsumoto, Shinji
AU - Ogata, Shunta
AU - Shimada, Hideki
AU - Sasaoka, Takashi
AU - Hamanaka, Akihiro
AU - Kusuma, Ginting Jalu
N1 - Funding Information:
Acknowledgments: This work was partly supported by JSPS KAKENHI Grant Number 17H07401. We are also grateful to the mine and researchers at Kyushu University for supporting part of the analysis. The authors would like to thank Enago (www.enago.jp) for the English language review.
Funding Information:
This work was partly supported by JSPS KAKENHI Grant Number 17H07401. We are also grateful to the mine and researchers at Kyushu University for supporting part of the analysis. The authors would like to thank Enago (www.enago.jp) for the English language review.
Publisher Copyright:
© 2018 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2018/4/16
Y1 - 2018/4/16
N2 - Soil water erosion is frequently reported as serious problem in soils in Southeast Asia with tropical climates, and the variations in pH affect the development of the erosion. This study investigated the effects of changes in pH on soil water erosion based on changes in the physical properties of the simulated soils with pH adjusted from 2.0 to 10.0 through artificial rainfall tests. The zeta potential was entirely shifted to positive direction at each pH condition due to Al, Ca, and Mg. In the pH range of 6.0 to 2.0, the aggregation of soil particles resulting from the release of Al3+ from clay minerals and/or molecular attraction between soil particles caused the plastic index (IP) of the soil to decrease. The decrease in IP led to the development of soil water erosion at the pH range. When the pH exceeded 6.0, the repulsive force generated by the negative charges on soil particles decreased IP, resulting in accelerated erosion by water. The results suggest that changes in pH causes physical properties of the soil to change through changes of the zeta potential in the clayey soil rich in Al, Ca, and Mg, leading to the development of soil water erosion.
AB - Soil water erosion is frequently reported as serious problem in soils in Southeast Asia with tropical climates, and the variations in pH affect the development of the erosion. This study investigated the effects of changes in pH on soil water erosion based on changes in the physical properties of the simulated soils with pH adjusted from 2.0 to 10.0 through artificial rainfall tests. The zeta potential was entirely shifted to positive direction at each pH condition due to Al, Ca, and Mg. In the pH range of 6.0 to 2.0, the aggregation of soil particles resulting from the release of Al3+ from clay minerals and/or molecular attraction between soil particles caused the plastic index (IP) of the soil to decrease. The decrease in IP led to the development of soil water erosion at the pH range. When the pH exceeded 6.0, the repulsive force generated by the negative charges on soil particles decreased IP, resulting in accelerated erosion by water. The results suggest that changes in pH causes physical properties of the soil to change through changes of the zeta potential in the clayey soil rich in Al, Ca, and Mg, leading to the development of soil water erosion.
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U2 - 10.3390/geosciences8040134
DO - 10.3390/geosciences8040134
M3 - Article
AN - SCOPUS:85045631453
SN - 2076-3263
VL - 8
JO - Geosciences (Switzerland)
JF - Geosciences (Switzerland)
IS - 4
M1 - 134
ER -