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Soil pH Effect on Phosphate Induced Cadmium Precipitation in Arable Soil

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Abstract

The objective of this study was to determine soil pH conditions that allow cadmium (Cd) to precipitate as Cd minerals in phosphate (P) amended soil. Cadmium immobilization could be attributed primarily to Cd adsorption due to increase in pH and negative charge. Soil pH might not affect Cd precipitation as Cd3(PO4)2 by direct reaction of Cd and P in the studied soil, even when soil pH increased up to 9.0. However, Cd might precipitate as CdCO3 with increasing pH up to 9.0 in P untreated soil and up to 8.0 in P treated soil depending on CO2 level.

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Acknowledgments

This work was carried out with the support of “Cooperative Research Program for Agriculture Science and Technology Development (Project No. PJ009140)” Rural Development Administration, Republic of Korea.

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Correspondence to Chang Oh Hong or Pil Joo Kim.

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Hong, C.O., Owens, V.N., Kim, Y.G. et al. Soil pH Effect on Phosphate Induced Cadmium Precipitation in Arable Soil. Bull Environ Contam Toxicol 93, 101–105 (2014). https://doi.org/10.1007/s00128-014-1273-y

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  • DOI: https://doi.org/10.1007/s00128-014-1273-y

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