2009 Portland GSA Annual Meeting (18-21 October 2009)
Paper No. 251-9
Presentation Time: 9:00 AM-6:00 PM

HEAVY METAL AND NUTRIENT CONCENTRATIONS IN JAMAICA BAY, NEW YORK

DHAR, Ratan Kumar, Earth and Physical Sciences, YORK COLLEGE/CUNY, 94-20, Guy R. Brewer Blvd, Jamaica, NY 11451, rdhar@york.cuny.edu

Metal contamination of estuarine sediments and water is an increasing problem as urbanization continues to extend. Jamaica Bay, an embayment of the Atlantic Ocean on southwestern Long Island receives a large inputs from waste water treatment plants, sewage outflows, and surface runoff enriched with nutrients and heavy metals poses a serious concerns. As an initiative of broader study to understand the spatial and temporal variability of trace metal and nutrient concentrations in this area, water and sediment samples are being collected periodically from three different sites capturing the wide range of flushing zones. Water samples were analyzed for dissolved nutrients (phosphate, silicate, ammonia, nitrate, nitrite) by Lachet QuickChem 8500 and dissolved trace metals (As, Cd, Cr, Co, Cu, Fe, Pb, Mo, Mn, Ni, Se, Zn) were measured by ICP-OES (inductively coupled plasma optical emission spectrometry). Temperature, conductivity, salinity, turbidity, pH, ORP, dissolved oxygen (DO) were measured on site by YSI multiparameter probe (600 QS). Auger samples were analyzed for 26 elements including heavy metals by XRF (x-ray fluorescence spectrometry). The recent data from site A showed a consistency in trace metal concentrations in surface water and sediments. Higher aqueous concentration of Cr, Cu, Pb, Zn corresponds the higher sedimentary level of those metals. In both phases, significant variation was observed in meter scales. Trace amount of As (3.3 ± 1.5 μg/l) and Cd (3.9 ± 1.5 μg/l) were found in dissolved phase where as no As and Cd were detected by XRF in sediments. Large variation was observed in nutrients concentrations except Ortho-phosphate and nitrite. No significant correlation was identified between nutrients and heavy metals.

2009 Portland GSA Annual Meeting (18-21 October 2009)
General Information for this Meeting
Session No. 251--Booth# 241
Contaminant Hydrogeology: Contaminant Fate and Transport in Geological Systems (Posters)
Oregon Convention Center: Hall A
9:00 AM-6:00 PM, Wednesday, 21 October 2009

Geological Society of America Abstracts with Programs, Vol. 41, No. 7, p. 652

© Copyright 2009 The Geological Society of America (GSA), all rights reserved. Permission is hereby granted to the author(s) of this abstract to reproduce and distribute it freely, for noncommercial purposes. Permission is hereby granted to any individual scientist to download a single copy of this electronic file and reproduce up to 20 paper copies for noncommercial purposes advancing science and education, including classroom use, providing all reproductions include the complete content shown here, including the author information. All other forms of reproduction and/or transmittal are prohibited without written permission from GSA Copyright Permissions.