期刊
JOURNAL OF PLANT NUTRITION
卷 32, 期 7, 页码 1164-1172出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/01904160902943189
关键词
cadmium-contaminated soils; Oryza sativa L.; reducing power; sequential extraction method; zero-valent iron
资金
- Ministry of Education, Culture, Sports, Science, and Technology [16780043]
- Steel Industry Foundation
Cadmium (Cd) contamination in soils is a serious problem for crop production in the world. Zero-valent iron [Fe (0)] is a reactive material with reducing power capable of stabilizing toxic elements in a solution. In the present study, we examined the effect of zero-valent iron [Fe (0)] application on Cd accumulation in rice plants growing in Cd-contaminated paddy soils. The application of 1.0 and 0.5 mg Fe (0) per 100 g soils significantly reduced the Cd concentration in seeds and leaves by less than 10% and 20% of those without Fe (0) application, respectively. The form of Cd in soil was determined by sequential extraction. The Fe (0) application increased the free-oxides-occluded (less available) Cd content, and decreased the exchangeable and iron-manganese-oxides-bound (more available) Cd content, in Cd-contaminated soils. Thus, this study clearly showed that the application of Fe (0) is a promising approach for remediation of Cd-contaminated paddy soils.
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