Toxicity characteristic leaching procedure fails to extract oxoanion-forming elements that are extracted by municipal solid waste leachates

Journal Article · Tue Dec 01 04:00:00 EST 1998 · Environmental Science and Technology

DOI:https://doi.org/10.1021/es980151q· OSTI ID:302224

Hooper, K; Iskander, M; Sivia, G ^[1]

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1. California Dept. of Toxic Substances Control, Berkeley, CA (United States). Hazardous Materials Lab.; and others

US EPA and state regulatory agencies rely on standard extraction tests to identify wastes that have the potential to contaminate surface water or groundwater. To evaluate the predictive abilities of these extraction tests, the Toxicity Characteristic Leaching Procedure (TCLP), the Waste Extraction Test (WET), and the Synthetic Precipitation Leaching Procedure (SPLP) were compared with actual municipal solid waste leachates (MSWLs) for their ability to extract regulated elements from a variety of industrial solid wastes in short- and long-term extractions. Short-term extractions used MSWLs from a variety of California landfills. Long-term sequential extractions simulated longer term leaching, as might occur in MSW landfills. For most regulated elements, the TCLP roughly predicted the maximum concentrations extracted by the MSWLs. For regulated elements that form oxoanions (e.g., Sb, As, Mo, Se, V), however the TCLP underpredicted the levels extracted by the MSWL. None of the standard tests adequately predicted these levels. The results emphasize the need for better standardized techniques to identify wastes that have the potential to contaminate groundwater with oxoanion-forming elements, particularly arsenic.

• OSTI ID: 302224
• Journal Information: Environmental Science and Technology, Journal Name: Environmental Science and Technology Journal Issue: 23 Vol. 32; ISSN 0013-936X; ISSN ESTHAG
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
56 BIOLOGY AND MEDICINE
APPLIED STUDIES
ANTIMONY
ARSENIC
BIOASSAY
GROUND WATER
LEACHATES
MOLYBDENUM
MUNICIPAL WASTES
SANITARY LANDFILLS
SELENIUM
SOLID WASTES
SURFACE WATERS
VANADIUM
WATER POLLUTION