title: Remediation of cadmium-contaminated paddy soils by washing with chemicals: effect of soil washing on cadmium uptake by soybean.
abstract: We conducted a pot experiment to evaluate the effect of soil washing with CaCl(2) on Cd absorption by two soybean cultivars. The results were as follows: (1) Soybean growth was not significantly different in washed and unwashed soils, but the seed Cd concentration for both cultivars decreased significantly, up to 25%, in the washed soils compared with the unwashed soils. (2) In the washed soils, the Cd concentration in the soil solution indicated an obviously lower value from sowing to the flowering stage; however, the change in Cd speciation was not evident in the CaCl(2)-washed soil solution. Consequently, the effect of soil washing using CaCl(2) on Cd-contaminated paddy soils can be expected to continue after a CaCl(2)-washed paddy field is converted to an upland field.
authors.affiliation: National Institute for Agro-Environmental Sciences, 3-1-3 Kannondai, Tsukuba, Ibaraki 305-8604, Japan. ymaeji@niaes.affrc.go.jp
authors.forename: Yuji
authors.initials: Y
authors.lastname: Maejima
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Makino
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Takano
authors.forename: Takashi
authors.initials: T
authors.lastname: Kamiya
authors.forename: Naoki
authors.initials: N
authors.lastname: Sekiya
authors.forename: Tadashi
authors.initials: T
authors.lastname: Itou
mesh_terms: D002104:Cadmium / Q000302:isolation & purification* / Q000378:metabolism*; D002412:Cations / Q000378:metabolism; D052918:Environmental Restoration and Remediation / Q000379:methods*; D005638:Fruit / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D018515:Plant Leaves / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D012639:Seeds / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis / Q000302:isolation & purification; D013025:Glycine max / Q000378:metabolism*
chemical_list: D002412:Cations; D012989:Soil Pollutants; D002104:Cadmium