東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Organic geochemical investigations o...

Olsen, Kevin.

Linked to FindBook

Google Book

Amazon

博客來

Organic geochemical investigations of urban sediments by pyrolysis-gas chromatography / mass spectroscopy.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Organic geochemical investigations of urban sediments by pyrolysis-gas chromatography / mass spectroscopy./
Author:	Olsen, Kevin.
Description:	552 p.
Notes:	Source: Dissertation Abstracts International, Volume: 75-08(E), Section: B.
Contained By:	Dissertation Abstracts International75-08B(E).
Subject:	Environmental management. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3618489
ISBN:	9781303868375

Organic geochemical investigations of urban sediments by pyrolysis-gas chromatography / mass spectroscopy.
Olsen, Kevin.

Organic geochemical investigations of urban sediments by pyrolysis-gas chromatography / mass spectroscopy. - 552 p.

Source: Dissertation Abstracts International, Volume: 75-08(E), Section: B.

Thesis (Ph.D.)--Montclair State University, 2014.

An urban sediment is not simply defined by proximity to a city. Because cities have anthropogenic contamination, one important urban sediment characteristic is ongoing recontamination. Another is legacy contamination from industrial activity and a third is the alteration of natural bio-geochemical systems.

ISBN: 9781303868375Subjects--Topical Terms:

535182
Environmental management.

Organic geochemical investigations of urban sediments by pyrolysis-gas chromatography / mass spectroscopy.
LDR:03467nmm a2200325 4500 001 2065928
005 20151205152851.5
008 170521s2014 ||||||||||||||||| ||eng d
020 $a 9781303868375
035 $a (MiAaPQ)AAI3618489
035 $a AAI3618489
040 $a MiAaPQ $c MiAaPQ
100 1 $a Olsen, Kevin. $3 3180683
245 1 0 $a Organic geochemical investigations of urban sediments by pyrolysis-gas chromatography / mass spectroscopy.
300 $a 552 p.
500 $a Source: Dissertation Abstracts International, Volume: 75-08(E), Section: B.
500 $a Adviser: Michael A. Kruge.
502 $a Thesis (Ph.D.)--Montclair State University, 2014.
520 $a An urban sediment is not simply defined by proximity to a city. Because cities have anthropogenic contamination, one important urban sediment characteristic is ongoing recontamination. Another is legacy contamination from industrial activity and a third is the alteration of natural bio-geochemical systems.
520 $a Two case studies are presented. The surface sediments of the Gateway National Recreation Area were sampled during the summer of 2007. The ratio of two pyrolysis products, Vinylguiacol, from terrestrial plant lignins, and Indole, from proteins, (VGI Index) is moderately well correlated with the sediment C/N ratios. A low VGII (0.33) suggests that the primary input of organic matter along the shores of the National Park's Jamaica Bay is terrestrial while the inputs are primarily marine in areas where there has been a dramatic loss of salt marshes. In contrast, healthy marshes on the park's nearby Sandy Hook unit had a VGII of 0.82. The VGII could also be correlated with the Carbon Preference Index (CPI) (r = 0.54) and the Syringol / Vanillyl (S/V) ratio (r = 0.87). Increased values of the CPI often indicate an organic input from terrestrial plants while increasing S/V values are often associated with grasses. A Principle Component Analysis (PCA) grouped the sample points associated with either water pollution control plants or combined sewer overflows into one component. This serves to reinforce the observation that most of the current freshwater inputs to Jamaica Bay have been from sewer discharges.
520 $a The suitability of Py-GC/MS to study conditions in a sediment core is the focus of the second case study. A 2-meter sediment core was obtained from the Passaic River's Dundee Lake. The core was taken from a highly disturbed part of the river and clear temporal trends were not discernible. Compounds of the same chemical class showed clear patterns of co-occurrence and correlations were frequently 0.9 or higher among petrogenic compounds. These results suggest related co-deposited compounds tend to remain together even in disturbed areas.
520 $a Because the majority of human populations now live near the coastlines a more sustainable sediment management policy needs to replace the current system of "dredge and dump." One challenge in the future will be to have an adequate supply of sediment to protect the coasts against rising sea levels. Characterizing the organic matter in those sediments is another potentially useful application of py-GC/MS.
590 $a School code: 0759.
650 4 $a Environmental management. $3 535182
650 4 $a Organic chemistry. $3 523952
650 4 $a Geochemistry. $3 539092
690 $a 0474
690 $a 0490
690 $a 0996
710 2 $a Montclair State University. $b Earth and Environmental Studies. $3 2101318
773 0 $t Dissertation Abstracts International $g 75-08B(E).
790 $a 0759
791 $a Ph.D.
792 $a 2014
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3618489