Evaluation of hexavalent chromium in sediment pore water of the Hackensack River, New Jersey, USA.
Pore water was collected from in situ passive samplers in Hackensack River sediments adjacent to a chromite ore processing residue site in Kearny, New Jersey. Although the sediments at this site contained more than 3,000 mg/kg of total chromium (Cr) and shallow groundwater adjacent to the shore contained more than 1,000 microg/L of hexavalent Cr [Cr(VI)], concentrations of dissolved total Cr and Cr(VI) in pore water (PW) samples were less than ambient water quality criteria for Cr(VI) (50 microg/L). Concentrations of dissolved total Cr in pore water ranged from <2.0 to 5.3 microg/L, while Cr(VI) was not detected (<10 microg/L). These findings are consistent with previous studies, which demonstrated limited bioavailability and toxicity of Cr in sediment at this site and others with similar conditions.
Driscoll
Susan Kane
SK
Exponent, 1 Clock Tower Place, Suite 150, Maynard, Massachusetts 01754, USA. sdriscoll@exponent.com
McArdle
Margaret E
ME
Plumlee
Megan H
MH
Proctor
Deborah
D
D002712:Chlorides / Q000032:analysis; D002857:Chromium / Q000032:analysis*; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000032:analysis*; D009515:New Jersey; D045483:Rivers / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*
D002712:Chlorides; D014874:Water Pollutants, Chemical; D002857:Chromium; C074702:chromium hexavalent ion