Preliminary environmental assessment of metal-contaminated sediment dredging in an Urban River, New Jersey, USA

Oluwafemi Soetan, Jing Nie, Huan Feng

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

While several studies have reported success with remedial sediment dredging, the sustainability of these impacts remain unclear. This preliminary study aimed to investigate the short- and long-term effects of remedial dredging on metal contamination, dredging efficacy and ecological status of the Lower Passaic River. To accomplish this, pre- and post-dredging data were statistically analyzed and evaluated using geochemical indices. Short-term results showed effective heavy metal reduction although their concentrations became elevated in water column, increasing bioaccumulation risk in aquatic biota. On the long-term, metal concentrations increased in surface sediments. Ecological assessment revealed that Cu, Hg and Pb pose greater risks while Ag remained abundant despite dredging. Further investigation suggests that post-dredging residuals, surface runoff and sewage pollution may contribute significantly to recontamination and continued pollution. Depletion in long-term dredging efficacy from spring to summer suggest that season-influenced changes in temperature, algae growth and stormwater discharge may have played a role.

Original languageEnglish
Article number114212
JournalMarine Pollution Bulletin
Volume184
DOIs
StatePublished - Nov 2022

Keywords

  • Heavy metal remediation
  • Lower Passaic River
  • Pollution index
  • Seasonal variation
  • Sediment dredging
  • Sediment pollution

Fingerprint

Dive into the research topics of 'Preliminary environmental assessment of metal-contaminated sediment dredging in an Urban River, New Jersey, USA'. Together they form a unique fingerprint.

Cite this