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Distribution and partitioning of trace metals in contaminated soils near Leadville, Colorado

Journal Article · · Journal of Environmental Quality; (United States)
 [1]; ; ;  [2]
  1. Univ. of California, Riverside (United States)
  2. Colorado State Univ., Fort Collins (United States)
Mountain meadows near Leadville, CO, were contaminated with trace metals through the deposition of hydraulically transported mine tailings in the early 1900s. A study was conducted to: (I) characterize the physical and chemical properties of contaminated soils, (II) determine the soil depth distribution of total, organically bound, oxide-bound, exchangeable, and water-soluble metals, and (III) evaluate trace metals in forages grown in contaminated meadows. One uncontaminated and four contaminated locations in a north-south transect were studied. Total soil metals ranged from: Cu, 14 to 1200 mg kg[sup [minus]1]; Cd, 3 to 110 mg kg[sup [minus]1]; Pb, 46 to 49000 mg kg[sup [minus]1]; and Zn, 44 to 12000 mg kg[sup [minus]1]. The greatest concentrations of total metals were found either in the surface horizons or in hydraulically deposited sand layers that were buried at three locations. Copper was predominantly associated with the organic fraction at four of the five locations, while Cd, Pb, and Zn were mainly bound to Fe and Mn oxides at all locations. The concentrations of Cd, Pb, and Zn in forages were significantly related to various fractions of soil metals and were found to be potentially detrimental to livestock health and plant growth.
OSTI ID:
6994730
Journal Information:
Journal of Environmental Quality; (United States), Journal Name: Journal of Environmental Quality; (United States) Vol. 21:2; ISSN JEVQAA; ISSN 0047-2425
Country of Publication:
United States
Language:
English