Published 1990 | Version v1
Book Metadata-only

Evidence of laser induced degradation and graphitization of aromatic pollutants

Creators

  • 1. CNR and Istituto di Chemica, Universita di Basilicata, Via N. Sauro, n. 85 Potenza (Italy)
  • 2. Dipartimento di Chimica, Universita La Sapienza, P.le A. Moro, n. 5 Roma (Italy)
  • 3. ENEA Dip. TIB, C.P. 65 00044 Frascati (Italy)

Description

An investigation of the laser induced photodecomposition and graphitization of the important class of pollutants, polynuclear aromatic hydrocarbons, is reported. The laser irradiation of the solid samples of pollutants was performed by means a frequency quadrupled Nd-Yay laser. A black powder consisting mainly of carbon is formed. Charged particles produced in the laser plume were analyzed in a time of flight mass spectrometer. The positive and negative ions formed by irradiating anthracene and benzopyrene consist mainly of Cn±, CnH±, CnH2± ions. Carbon cluster ions up to very high m/e 7000 were observed for both positive and negative ions. Irradiation by pulsed CO2 laser produces a wide plume which has been analyzed by OMA system. The strong emission has been assigned to excited carbon clusters and to H and H

Additional details

Publishing Information

Publisher
STS Press.
Imprint Place
McLean, VA (USA)
Imprint Title
Lasers '89
Imprint Pagination
1159 p.
Journal Page Range
p. 731-736.

Conference

Title
12th international conference on lasers and applications.
Acronym
Lasers '89
Dates
3-8 Dec 1989.
Place
New Orleans, LA (USA).

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
22005817
Subject category
S74: ATOMIC AND MOLECULAR PHYSICS; S74: ATOMIC AND MOLECULAR PHYSICS; S61: RADIATION PROTECTION AND DOSIMETRY;
Resource subtype / Literary indicator
Conference
Descriptors DEI
ANTHRACENE; AROMATICS; BENZOPYRENE; CARBON; CARBON DIOXIDE LASERS; CHARGED PARTICLES; EXCITED STATES; GRAPHITIZATION; HYDROGEN; INTERACTIONS; LASER RADIATION; NEODYMIUM LASERS; PHOTOIONIZATION; POLLUTANTS; PULSED IRRADIATION; TIME-OF-FLIGHT METHOD
Descriptors DEC
AMPLIFIERS; CONDENSED AROMATICS; ELECTROMAGNETIC RADIATION; ELEMENTS; ENERGY LEVELS; EQUIPMENT; GAS LASERS; HYDROCARBONS; IONIZATION; IRRADIATION; LASERS; NONMETALS; ORGANIC COMPOUNDS; RADIATIONS; SOLID STATE LASERS

Optional Information

Secondary number(s)
CONF-891261--.