Photochemical transformation of pyrene vapor deposited on eleven subfractions of a high-carbon coal stack ash

Miller, Vernon R.; Wehry, E. L.; Mamantov, Gleb

doi:10.1002/etc.5620090802

Photochemical transformation of pyrene vapor deposited on eleven subfractions of a high-carbon coal stack ash

Journal Article · Wed Aug 01 00:00:00 EDT 1990 · Environmental Toxicology and Chemistry

DOI:https://doi.org/10.1002/etc.5620090802· OSTI ID:2496786

Miller, Vernon R.; Wehry, E. L.; Mamantov, Gleb

Abstract

A high-carbon coal stack ash has been separated by particle size and then by composition, into strongly magnetic, weakly magnetic, “nonmagnetic” mineral, heavy carbon and light carbon fractions. Eleven of these fractions have been characterized by bulk iron and carbon analyses and BET surface area determinations. The photochemical transformation of pyrene, deposited from the vapor phase onto these eleven ash fractions, has been studied. Appreciable phototransformation of adsorbed pyrene was observed for only three fractions; in those fractions, the bulk percentage of carbon (0.4–0.7%) and the specific surface area (0.50–0.68 m2/g) were both very low. For all fractions having bulk carbon percentages ≥ 4% and specific surface areas ≥ 2.85 m2/g, no detectable phototransformation of adsorbed pyrene was observed. There was no discernible correlation of photochemical reactivity of adsorbed pyrene with the iron content of the ash fractions. In general, the specific surface area of the fractions increased with increased carbon content; two different forms of carbon having different surface areas were observed.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: FG05-87ER60552

OSTI ID:: 2496786

Journal Information:: Environmental Toxicology and Chemistry, Journal Name: Environmental Toxicology and Chemistry Journal Issue: 8 Vol. 9; ISSN 0730-7268

Publisher:: Oxford University PressCopyright Statement

Country of Publication:: United States

Language:: English

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