国立研究開発法人 国際農林水産業研究センター | JIRCAS

Remediation of Cadmium-contaminated Paddy Soils by Washing with Ferric Chloride (FeCl<sub>3</sub>): Effect of Soil Washing on the Cadmium Concentration in Soil Solution and Spinach

JARQ : Japan Agricultural Research Quarterly
ISSN
00213551
書誌レコードID(総合目録DB)
AA0068709X
本文フルテキスト

We evaluated the effects of soil washing with ferric chloride (FeCl3) on cadmium (Cd) concentrations in soil solutions and Cd absorption by two spinach cultivars in pot experiments. Soil samples were collected from washed and unwashed plots of rice paddy fields in Fukuoka and Toyama, Japan. Spinach pot cultivation was performed with the above mentioned soil under oxidative conditions. Before and after spinach cultivation, the Cd content in washed soils was always lower than that in unwashed soils.Soil washing with FeCl3 affected the exchangeable cations (i.e. calcium increased and magnesium decreased). The Cd concentration in the soil solution from washed plot was lower than that in the solution from the unwashed plot throughout the spinach growth period, which was attributed to the exchangeable Cd content in both soils, because the fraction equilibrated with the Cd concentration in the soil solution. The exchangeable cation composition was affected by soil washing, but no significant difference in spinach yield was observed between the washed and unwashed plots. The leaf Cd concentration in the two spinach cultivars was up to 70% lower in the washed soils. This study suggested that soil washing in rice paddy fields with FeCl3 was effective for controlling the Cd absorption risk of upland crops such as spinach. However, some risks remain to clear the CODEX standard (0.2 mg kg?1) in the Cd content of leaf such as spinach, which has a high Cd absorptive capacity.

刊行年月2013-07-01
作成者AKAHANE IkukoMAKINO TomoyukiMAEJIMA YujiKAMIYA TakashiTAKANO HiroyukiIBARAKI ToshiyukiINAHARA Makoto
著者キーワード

chemical washing

heavy metal

leaf vegetable

pot experiment

remediation technology

公開者Japan International Research Center for Agricultural Sciences
データ作成日2013-07-01
国立情報学研究所メタデータ主題語彙集(資源タイプ)Journal Article
47
3
開始ページ273
終了ページ281
DOI10.6090/jarq.47.273
権利Japan International Research Center for Agricultural Sciences
言語eng