Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 163, Issue 2-3, Pages 829-834Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2008.07.034
Keywords
Wheat; Oat; Sorghum; Tannery sludge; Chromium; Toxicity
Categories
Funding
- National Council of Science and Technology
- [SEMARNAT-Conacyt-2002-C01-0184]
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This work assessed the effect of soil amended with tannery sludge (0, 500, 1000, 2000, 4000 and 8000 mg Cr kg(-1) soil), Cr3+ as CrCl3 center dot 6H(2)O (0, 100, 250, 500, 1000 and 2000 mg Cr kg(-1) soil), and Cr6+ as K2Cr2O7 (0, 25, 50, 100, 200 and 500 mg Cr kg(-1) soil) on wheat, oat and sorghum plants. Seed germination, seedling growth (root and shoot) and Cr accumulation in dry tissue were measured. Toxicological parameters: medium effective concentration, no observed adverse effect concentration and low observed adverse effect concentration were determined. Root growth was the most sensitive assessment of Cr toxicity (P < 0.05). There was a significant correlation (P < 0.0001) between Cr accumulation in dry tissue and toxic effects on seedling growth. The three Cr Sources had different accumulation and mobility patterns: tannery sludge was less toxic for all three plant species, followed by CrCl3 center dot 6H(2)O and K2Cr2O7. (C) 2008 Published by Elsevier B.V.
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