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Title: Phenanthrene mineralization along a natural salinity gradient in an Urban Estuary, Boston Harbor, Massachusetts

Abstract

The effect of varying salinity on phenanthrene and glutamate mineralization was examined in sediments along a natural salinity gradient in an urban tidal river. Mineralization was measured by trapping {sup 14}CO{sub 2} from sediment slurries dosed with trace levels of ({sup 14}C)phenanthrene or ({sup 14}C)glutamate. Sediments from three sites representing three salinity regimes (0, 15, and 30%) were mixed with filtered column water from each site. Ambient phenanthrene concentrations were also determined to calculate phenanthrene mineralization rates. Rates of phenanthrene mineralization related significantly to increasing salinity along the transect as determined by linear regression analysis. Rates ranged from 1 ng/hour/g dry sediment at the freshwater site to >16 ng/hour/g dry sediment at the 30% salinity site. Glutamate mineralization also increased from the fresh-water to the marine site; however, the relationship to salinity was not statistically significant. The results suggest that phenanthrene degraders in low salinity estuarine sediments subject to salt water intrusion are tolerant to a wide range of salinities buy phenanthrene degradation in brackish waters is mainly a function of obligate marine microorganisms.

Authors:
 [1]
  1. Univ. of Massachusetts, Boston (USA)
Publication Date:
OSTI Identifier:
7119111
Resource Type:
Journal Article
Journal Name:
Microbial Ecology; (USA)
Additional Journal Information:
Journal Volume: 18:2; Journal ID: ISSN 0095-3628
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; PHENANTHRENE; BIODEGRADATION; CARBON 14 COMPOUNDS; ESTUARIES; GLUTAMIC ACID; MASSACHUSETTS; MINERALIZATION; RIVERS; SALINITY; SEDIMENTS; TRACER TECHNIQUES; AMINO ACIDS; AROMATICS; CARBOXYLIC ACIDS; CHEMICAL REACTIONS; CONDENSED AROMATICS; DECOMPOSITION; FEDERAL REGION I; HYDROCARBONS; ISOTOPE APPLICATIONS; LABELLED COMPOUNDS; NORTH AMERICA; ORGANIC ACIDS; ORGANIC COMPOUNDS; STREAMS; SURFACE WATERS; USA; 540311* - Environment, Aquatic- Basic Studies- Radiometric Techniques- (1990-)

Citation Formats

Shiaris, M P. Phenanthrene mineralization along a natural salinity gradient in an Urban Estuary, Boston Harbor, Massachusetts. United States: N. p., 1989. Web. doi:10.1007/BF02030122.
Shiaris, M P. Phenanthrene mineralization along a natural salinity gradient in an Urban Estuary, Boston Harbor, Massachusetts. United States. doi:10.1007/BF02030122.
Shiaris, M P. Sun . "Phenanthrene mineralization along a natural salinity gradient in an Urban Estuary, Boston Harbor, Massachusetts". United States. doi:10.1007/BF02030122.
@article{osti_7119111,
title = {Phenanthrene mineralization along a natural salinity gradient in an Urban Estuary, Boston Harbor, Massachusetts},
author = {Shiaris, M P},
abstractNote = {The effect of varying salinity on phenanthrene and glutamate mineralization was examined in sediments along a natural salinity gradient in an urban tidal river. Mineralization was measured by trapping {sup 14}CO{sub 2} from sediment slurries dosed with trace levels of ({sup 14}C)phenanthrene or ({sup 14}C)glutamate. Sediments from three sites representing three salinity regimes (0, 15, and 30%) were mixed with filtered column water from each site. Ambient phenanthrene concentrations were also determined to calculate phenanthrene mineralization rates. Rates of phenanthrene mineralization related significantly to increasing salinity along the transect as determined by linear regression analysis. Rates ranged from 1 ng/hour/g dry sediment at the freshwater site to >16 ng/hour/g dry sediment at the 30% salinity site. Glutamate mineralization also increased from the fresh-water to the marine site; however, the relationship to salinity was not statistically significant. The results suggest that phenanthrene degraders in low salinity estuarine sediments subject to salt water intrusion are tolerant to a wide range of salinities buy phenanthrene degradation in brackish waters is mainly a function of obligate marine microorganisms.},
doi = {10.1007/BF02030122},
journal = {Microbial Ecology; (USA)},
issn = {0095-3628},
number = ,
volume = 18:2,
place = {United States},
year = {1989},
month = {1}
}