Assessment of phytotoxicity of chromium in flooded soils using embedded selective ion exchange resin method

• Published in: Plant and soil Vol. 277; no. 1-2; pp. 97 - 105
• Main Authors: Lee, D.Y, Huang, J.C, Juang, K.W, Tsui, L
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer 01.12.2005; Springer Nature B.V
• Subjects: Acid soils; Adsorption; Agricultural soils; Agronomy. Soil science and plant productions; Aquatic plants; Biological and medical sciences; Chromium; flooded conditions; Flooded soils; Fundamental and applied biological sciences. Psychology; heavy metals; Ion exchange; ion exchange resins; Non agrochemicals pollutants; nutrient availability; Oryza sativa; Phytopathology. Animal pests. Plant and forest protection; Phytotoxicity; Pollution effects and side effects of agrochemicals on crop plants and forest trees. Other anthropogenic factors; Pollution effects. Side effects of agrochemicals; Redox potential; redox reactions; Regular articles; Resins; Rice; Rice soils; Saturated soils; seedling growth; Seedlings; Soil and water pollution; Soil plant interactions; Soil pollution; Soil science; Soil testing; Soil toxicity; Monocotyledones; Cultivated soil; Embedding; Submersion; Soil pollution; Cereal crop; Chemical pollution; Chemical reduction; Oryza sativa; Gramineae; Angiospermae; Soil science; Paddy field; Acid medium; Ion exchange resin; Soil chemistry; Evaluation; Ecotoxicology; Property of soil; Paddy soil; Heavy metal; Measurement in situ; Phytotoxicity; Ionic selectivity; Adsorption; paddy fields; Chromium; Poison; Flooded soil; Spermatophyta; Redox potential; Soil plant relation; Chromium VI
• ISSN: 0032-079X; 1573-5036
• DOI: 10.1007/s11104-005-5997-7

Chromium present in the forms of Cr(VI) or Cr(III) in soils. Since the toxicity and mobility of Cr(VI) are higher than those of Cr(III), it would be important to estimate soil Cr(VI) accurately in order to assess the phytotoxicity of Cr. Soil redox potential can influence the distribution of Cr between Cr(VI) and Cr(III) forms, and thus an in situ method which is not affected by the soil redox condition is needed for determining Cr(VI) availability in paddy fields. In this study, the Cu-saturated selective ion exchange resin (DOWEX M4159), serving as an infinite sink, was embedded in soils to extract available Cr(VI) from three representative saturated soils with different amounts of Cr(VI). The results suggested that Cr(VI) reduction occurred in the flooded soils, and the acid environment favored the adsorption and reduction of Cr(VI). There was a significant dose-response relationship between the soil resin-extractable Cr(VI) and the plant height of rice seedlings for test soils. The experimental results suggested that the embedded selective ion exchange resin method could be a suitable in situ method for assessing the phytotoxicity of Cr in flooded soils.