Application of pulsed laser methods to in situ probing of highway originated pollutants

TY - JOUR

T1 - Application of pulsed laser methods to in situ probing of highway originated pollutants

AU - Bulatov, Valery

AU - Gridin, Vladimir V.

AU - Polyak, Felix

AU - Schechter, Israel

N1 - Funding Information: This researchw as supported,in part, by the James-Franck Program for Laser Matter Interaction and by the Technion V.P.R. Fund. VVG and VB are grateful for partial financial support provided by the Israeli Ministry of Science and Technology and by the Ministry of Absorbtion to the scientists regardeda s return citizens and/or new immigrants.

PY - 1997/5/12

Y1 - 1997/5/12

N2 - A possibility of a portable field kit for studying traffic originated pollutants based on laser induced fluorescence (LIF) or multi-photon ionization fast-conductivity (MPI-FC) has been addressed. The resulting instrumentation has been successfully tested on soil samples that were collected and classified according to their radial distance, R, from a busy highway. The sampling was done in the near-field range with A varying from 3 to 50 m. Organic material from the samples was transferred into hexane solutions by short-time shaking with pure hexane. These solutions were investigated by simple LIF and MPI-FC instruments, which can be engineered as portable units (e.g., a PC plugged-in spectrometer has been used, in which case both the signal excitation and detection were accessed by means of optical fibers). Detected traces showed a nearly 1/R fall-off of the LIF and MPI-FC experimental data as a function of the sample distance from the road. It is estimated that at 50 m from the road the contamination concentrations (about 90% aliphatics and 10% aromatics) are as high as 0.1 μg g-1. Both proposed methods provide good sensitivity at the relevant concentration range and may be applied for fast screening of traffic contamination of soils.

AB - A possibility of a portable field kit for studying traffic originated pollutants based on laser induced fluorescence (LIF) or multi-photon ionization fast-conductivity (MPI-FC) has been addressed. The resulting instrumentation has been successfully tested on soil samples that were collected and classified according to their radial distance, R, from a busy highway. The sampling was done in the near-field range with A varying from 3 to 50 m. Organic material from the samples was transferred into hexane solutions by short-time shaking with pure hexane. These solutions were investigated by simple LIF and MPI-FC instruments, which can be engineered as portable units (e.g., a PC plugged-in spectrometer has been used, in which case both the signal excitation and detection were accessed by means of optical fibers). Detected traces showed a nearly 1/R fall-off of the LIF and MPI-FC experimental data as a function of the sample distance from the road. It is estimated that at 50 m from the road the contamination concentrations (about 90% aliphatics and 10% aromatics) are as high as 0.1 μg g-1. Both proposed methods provide good sensitivity at the relevant concentration range and may be applied for fast screening of traffic contamination of soils.

KW - Fluorimetry

KW - Highway originated pollutants

KW - Laser methods

KW - Pollutants

UR - http://www.scopus.com/inward/record.url?scp=0030974073&partnerID=8YFLogxK

U2 - 10.1016/S0003-2670(97)00026-3

DO - 10.1016/S0003-2670(97)00026-3

M3 - 文章

AN - SCOPUS:0030974073

SN - 0003-2670

VL - 343

SP - 93

EP - 99

JO - Analytica Chimica Acta

JF - Analytica Chimica Acta

IS - 1-2

ER -