Part One: Environmental chemical impact of recycled plastic timbers used as construction material in Tiffany Street Pier, South Bronx, New York. Part Two: Chiral separation of dansyl-DL-amino acids by counterflow capillary electrophoresis.
Item
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Title
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Part One: Environmental chemical impact of recycled plastic timbers used as construction material in Tiffany Street Pier, South Bronx, New York. Part Two: Chiral separation of dansyl-DL-amino acids by counterflow capillary electrophoresis.
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Identifier
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AAI9820594
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identifier
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9820594
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Creator
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Xie, Yili Kevin.
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Contributor
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Adviser: David C. Locke
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Date
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1998
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Language
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English
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Publisher
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City University of New York.
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Subject
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Chemistry, Analytical | Environmental Sciences
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Abstract
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In 1994-95 the New York City Department of General Services designed and managed construction of a 11,390 ft{dollar}\sp2{dollar} pier to replace a decaying wooden recreational pier in the East River at the foot of Tiffany Street, the South Bronx. The new pier was constructed almost entirely of post-consumer recycled plastic (PCRP), which is immune to damage by marine boring organisms. In order to assess the environmental impact of the pier on water quality in the East River, we carried out a leaching study using simulated East River water to leach organic and inorganic species from the plastic used in the construction, and compared with similar leaching of CCA wood. The organic and metallic compounds in the leachates were characterized quantitatively. In addition, the odor from the constructing recycled plastic was trapped using a headspace device and analyzed qualitatively. From the data collected, we concluded that the recycled plastic will not add appreciably to the pollutant load of the East River.;The chiral separation of twelve pairs of chiral dansyl- scDL-amino acids were carried out by using quaternary ammonium {dollar}\beta{dollar}-cyclodextrin (Q-CD) as chiral selector with a coated capillary, which enabled a true counterflow between Q-CD and the enantiomers. Baseline separations of all the enantiomers were obtained with 0.2-1 mM Q-CD in the buffer solutions. The fundamentals of chiral separation were studied based on our experimental data. The effects of the concentration of Q-CD, buffer pH, applied voltage and temperature on the chiral selectivities were evaluated. In addition to the conventional capillary electrophoresis, a new partial-filling method was developed. A major advantage of this method is that it could eliminate the possible detection interference from chiral selectors.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
