U.S. EPA Contaminated Site Cleanup Information (CLU-IN)


U.S. Environmental Protection Agency
U.S. EPA Technology Innovation and Field Services Division

Search Result

MODIFICATIONS TO EPA METHOD 3060A TO IMPROVE EXTRACTION OF CR(VI) FROM CHROMIUM ORE PROCESSING RESIDUE-CONTAMINATED SOILS
Mills, C.T., C.R. Bern, R.E. Wolf, A.L. Foster, J.M. Morrison, and W.M. Benzel.
Environmental Science & Technology 51(19):11235-11243(2017)

USGS scientists modified various parameters of EPA 3060A toward understanding the transformation of chromium ore processing residue (COPR) minerals in alkaline extraction and improving extraction of Cr(VI) from NIST SRM 2701, a standard COPR-contaminated soil. Aluminum and Si were the major elements dissolved from NIST 2701, and their concentrations in solution were correlated with Cr(VI). The extraction fluid leached additional Al and Si from the method-prescribed borosilicate glass vessels, which appeared to suppress Cr(VI) release. Use of polytetrafluoroethylene vessels and intensive grinding of NIST 2701 increased the amount of Cr(VI) extracted. The modifications, combined with an increased extraction fluid to sample ratio of =900 mL/g and 48-h extraction time, resulted in a maximum release of 1274 ± 7 mg/kg Cr(VI). Slides: http://apps.nelac-institute.org/nemc/2017/docs/pdf/Friday-Metals%20and%20Metal%20Speciation%20Analysis%20in%20Environmental%20Samples-28.6-Mills.pdf



The Technology Innovation News Survey welcomes your comments and suggestions, as well as information about errors for correction. Please contact Michael Adam of the U.S. EPA Office of Superfund Remediation and Technology Innovation at adam.michael@epa.gov or (703) 603-9915 with any comments, suggestions, or corrections.

Mention of non-EPA documents, presentations, or papers does not constitute a U.S. EPA endorsement of their contents, only an acknowledgment that they exist and may be relevant to the Technology Innovation News Survey audience.