title: Evaluation of hexavalent chromium in sediment pore water of the Hackensack River, New Jersey, USA.
abstract: 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.
authors.affiliation: Exponent, 1 Clock Tower Place, Suite 150, Maynard, Massachusetts 01754, USA. sdriscoll@exponent.com
authors.forename: Susan Kane
authors.initials: SK
authors.lastname: Driscoll
authors.forename: Margaret E
authors.initials: ME
authors.lastname: McArdle
authors.forename: Megan H
authors.initials: MH
authors.lastname: Plumlee
authors.forename: Deborah
authors.initials: D
authors.lastname: Proctor
mesh_terms: 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*
chemical_list: D002712:Chlorides; D014874:Water Pollutants, Chemical; D002857:Chromium; C074702:chromium hexavalent ion