Soil pH effect on phosphate induced cadmium precipitation in Arable soil.
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.
Department of Life Science and Environmental Biochemistry, Pusan National University, Miryang, 627-706, South Korea, soilchem@pusan.ac.kr.
Chang Oh
CO
Hong
Vance N
VN
Owens
Yong Gyun
YG
Kim
Sang Mong
SM
Lee
Hyean Cheal
HC
Park
Keun Ki
KK
Kim
Hong Joo
HJ
Son
Jeong Min
JM
Suh
Pil Joo
PJ
Kim
D002104:Cadmium / Q000032:analysis / Q000737:chemistry*; D011232:Chemical Precipitation; D006863:Hydrogen-Ion Concentration; D010710:Phosphates / Q000737:chemistry*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis*
D010710:Phosphates; D012987:Soil; D012989:Soil Pollutants; D002104:Cadmium