Analysis of seasonal variation and correlation of neutral organic pollutants in New York City precipitation.
Item
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Title
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Analysis of seasonal variation and correlation of neutral organic pollutants in New York City precipitation.
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Identifier
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AAI9530936
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identifier
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9530936
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Creator
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Zhang, Amy Yin.
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Contributor
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Adviser: David C. Locke
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Date
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1995
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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 | Physics, Atmospheric Science | Environmental Sciences
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Abstract
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Neutral organic compounds were extracted from rainwater and snow by micro-solvent liquid-liquid extraction or solid phase extraction, and quantitively analyzed for polycyclic aromatic hydrocarbons (PAH), alkanes, and phthalate esters by HPLC or GC and by GC/MS. PAHs are known for their carcinogenicity and mutagenicity. 16 PAHs and 7 n-alkanes were identified in New York City precipitation. 5 PAHs were most frequently detected and are predominant components of total PAH levels. A hump of unresolved hydrocarbons was consistently observed in GC profiles, which indicates significant anthropogenic inputs to the organic content of precipitation. The levels of most compounds varied with season but were mostly at parts-per-billion levels. Seasonal variation of levels of total PAHs and n-alkanes were found in the order: Winter {dollar}>{dollar} Fall {dollar}>{dollar} Spring {dollar}>{dollar} Summer. A correlation between levels of total PAHs and n-alkanes in most of rain events was also identified as an indicator of anthropogenic inputs.
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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.
