Biosolids-amended soils: Part II. Chemical lability as a measure of contaminant bioaccessability

Paul Schwab, Kevin Lewis, Margaret Katherine Banks

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Biosolids recycling by amending agricultural soils has increased significantly over the last few decades. The presence of contaminants in small, bioavailable quantities has generated concerns about health threats resulting from accumulation of potential toxins in the food chain. In this study, land application of biosolids was evaluated for environmental risk. Chemical lability tests for metals were used for the test soils and included analyses for water soluble, exchangeable, and metals extractable by the physiologically based extraction test. Chemical extractions detected slight increases in labile metal concentrations for many of the treated soils, particularly those receiving long-term applications of 5 years or more. Significantly higher metal concentrations were observed in the soils that had been exposed to biosolids before the U.S. Environmental Protection Agency (Washington, D.C.) 503 Rule (U.S. EPA, 2004) was implemented.

Original languageEnglish (US)
Pages (from-to)2231-2243
Number of pages13
JournalWater Environment Research
Issue number11
StatePublished - Oct 2006


  • Arsenic
  • Bioaccessibility
  • Bioavailability
  • Biosolids
  • Cadmium
  • Chromium
  • Lability
  • Lead
  • Metals
  • Toxicity

ASJC Scopus subject areas

  • Environmental Chemistry
  • Ecological Modeling
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution


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