By Herbert E. Allen, Chin-Pao Huang, George W. Bailey, Alan R. Bowers

Steel Speciation and infection of Soil offers an intensive assessment of the biogeochemical tactics governing the habit, delivery, and bioavailability of heavy metals in infected soils and indicates replacement ways for potent remediation. this crucial new ebook comprises contributions from specialists in a variety of disciplines who discover the problems from theoretical, experimental, and pragmatic views. themes comprise redox chemistry, kinetics of steel reactions, spectroscopic characterization of steel ion reactions at floor, modeling hydrologic delivery phenomena and colloid-associated delivery of metals throughout the soil profile to floor water, and remediation choices.

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Predominant substrate factors are texture, concentration and nature of organic matter and pH. High pH, high clay and organic matter contents reduce the plant availability of most metals [51]. Dredged materials often have higher silt and organic matter contents than the corresponding soils, and this may result in lower initial bioavailabilities of the contaminants. In the long run, however, the organic matter will be partly decomposed with a corresponding increase in bioavailability. Another major difference between dredged materials and soils usually is the higher content of oxidizable sulfide compounds, such as iron sulfide in the former substrate.

R. 1. S. Army Corps of Engineers Waterways Experiment Station p. 186 (Vicksburg, MS 1981). 30 Forstner 55. Herms, U. and G. Brummer, "EinfluB der Bodenreaktion auf Loslichkeit und tolerierbare Gesamtgehalte an Nickel, Kupfer, Zink, Cadmium und Blei in Boden und kompostierbaren Siedlungsabfallen," Landwirtschaftl. F orschung 33 :408-423 (1980). 56. Hara, T. and J. Sonoda, "Comparison of the Toxicity of Heavy Metals to Cabbage Growth," Plant and Soil 50:127-133 (1979). 57. S. Environmental Protection Agency, Federal Register 43, 4942 (1978).

C. 1980). 42. , "Trace Elements in Human and Animal Nutrition," p. 288 Academic Press, (New York, 1977). 43. , "Micronutrients and the Nutrient Status of Soils: A Global Study," FAD Soils Bull. 48 p. 442 (Rome, 1982). 44. A. and V. Subramanian, "Copper, Lead and Zinc Pollution of Soil Environment," CRC Crit. Reviews Environ. Control March 1982, pp. 13-67. (1982). Land Contamination by Metals 29 45. Stevenson, F. S. Ardakani, "Organic Matter Reactions Involving Micronutrients in Soils," in Micronutrients in Agriculture, pp.

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