Assessment of soil Cr (Ⅲ) phytotoxicity using the chelating exchange resin extraction method
A chelating exchange resin, Chelex 100, was used to extract soil Cr (Ⅲ), and wheat seedling growth experiments were conducted to examine the phytotoxicity of Cr (Ⅲ)-spiked soils. The relationship between the amounts of resin-extractable Cr (Ⅲ) and the phytotoxicity of Cr (Ⅲ) was evaluated. Five agricultural soils with varying properties and Cr (Ⅲ) levels were tested. The results of the wheat seedling growth experiment showed that the dry weight and plant height of wheat grown in acid soils were affected by Cr (Ⅲ) addition. The level of Cr (Ⅲ) extracted from acidic soils by resins was higher than that from alkaline soils with the same level of added Cr (Ⅲ). The plant height of wheat seedlings grown in all tested soils was negatively correlated with the amount of soil resin-extractable Cr (Ⅲ), and the effective concentrations of resin-extractable Cr (Ⅲ) resulting in 10％ and 50％ growth inhibition (EC<,10> and EC <,50>) were 7 and 47mg· kg 1 respectively. These results suggest that the Chelex 100 resin extraction method is an appropriate method for assessing the phytotoxicity of soil Cr (Ⅲ).
chromium metal chelating exchange resins phytotoxicity
C. P. Chen D. Y. Lee K. W. Juang T. H. Lin
Graduate Institute of Agricultural Chemistry, National Taiwan University, Taipei, Taiwan, China Department of Modern Agriculture, Mingdao University, Pitow, Changhua, Taiwan, China
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
958-960
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）