publication . Article . 2001

Perchlorate levels in samples of sodium nitrate fertilizer derived from Chilean caliche

Urbansky, E. T.; Urbansky*, E.; Brown, S. K.; Magnuson, M. L.; Kelty, C. A.; Kelty*, C.;
Open Access
  • Published: 01 May 2001 Journal: Environmental Pollution, volume 112, pages 299-302 (issn: 0269-7491, Copyright policy)
  • Publisher: Elsevier BV
Abstract
Paleogeochemical deposits in northern Chile are a rich source of naturally occurring sodium nitrate. These caliche ores are mined and processed to isolate NaNO3 (16-0-0) for use in fertilizers. Coincidentally, these very same deposits are a natural soure of perchlorate anion (ClO4-). At sufficiently high concentrations, perchlorate interferes with iodide uptake in the thyroid gland and has been usewd medicinally for this purpose. In 1997 perchlorate contamination was discovered in a number of U.S. water supplies, including Lake Mead and the Colorado River. Subsequently, the Environmental Protection Agency (EPA) added this species to the Contaminant Candidate Lis...
Subjects
free text keywords: Toxicology, Pollution, Health, Toxicology and Mutagenesis, General Medicine, Water pollution, Fertilizer, engineering.material, engineering, Chemistry, Sodium nitrate, chemistry.chemical_compound, Groundwater, Contamination, Perchlorate, Caliche, Dilution, Environmental chemistry
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