Indoor simulation of insecticides supplied with an electric vaporizer by the fugacity model

From a viewpoint of safety assessment of insecticides being released with an electric vaporizer into a room a modified unsteady state Fugacity model (VAPOR-MOM) has been developed to simulate temporal variations of concentrations or amounts of active ingredient (ai) in air, on floor, wall and ceilin...

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Published inChemosphere (Oxford) Vol. 28; no. 4; pp. 767 - 786
Main Authors Matoba, Yoshihide, Ohnishi, Jun-ichi, Matsuo, Masatoshi
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 01.02.1994
Elsevier
Subjects
Applied sciences
Atmospheric pollution
Exact sciences and technology
Indoor pollution and occupational exposure
Pollution
Fugacity
Ambient air concentration
Insecticide
Indoor pollution
Safety
Modeling
Time variation
Vaporization
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Abstract From a viewpoint of safety assessment of insecticides being released with an electric vaporizer into a room a modified unsteady state Fugacity model (VAPOR-MOM) has been developed to simulate temporal variations of concentrations or amounts of active ingredient (ai) in air, on floor, wall and ceiling under various conditions. The model predicted behavior of ai in a quantitative sense in the concerned compartments due to variations of air exchange rate, photo-degradation and oxidation rate, transfer rate and physicochemical properties of ai. A simulation experiment showed that the time-dependent aerial concentrations of vaporous ai entirely agreed with measured ones. The model will be very useful to describe accurately concentrations of ai in various compartments by utilizing known, calculated, or easily available data of the rooms, formulations, use patterns, physicochemical properties without realization of experiments.
AbstractList From a viewpoint of safety assessment of insecticides being released with an electric vaporizer into a room a modified unsteady state Fugacity model (VAPOR-MOM) has been developed to simulate temporal variations of concentrations or amount of active ingredient (ai) in air, on floor, wall and ceiling under various conditions. The predicted behavior of ai in a quantitative sense in the concerned compartments due to variations of air exchange rate, photo-degradation and oxidation rate, transfer rate and physicochemical properties of ai. A simulation experiment showed that the time-dependent aerial concentrations of vaporous ai entirely agreed with measured ones. The model will be very useful to describe accurately concentrations of air in various compartments by utilizing known, calculated, or easily available data of the rooms, formulations, use patterns, physicochemical properties without realization of experiments.
From a viewpoint of safety assessment of insecticides being released with an electric vaporizer into a room a modified unsteady state Fugacity model (VAPOR-MOM) has been developed to simulate temporal variations of concentrations or amounts of active ingredient (ai) in air, on floor, wall and ceiling under various conditions. The model predicted behavior of ai in a quantitative sense in the concerned compartments due to variations of air exchange rate, photo-degradation and oxidation rate, transfer rate and physicochemical properties of ai. A simulation experiment showed that the time-dependent aerial concentrations of vaporous ai entirely agreed with measured ones. The model will be very useful to describe accurately concentrations of ai in various compartments by utilizing known, calculated, or easily available data of the rooms, formulations, use patterns, physicochemical properties without realization of experiments.
Electric vaporizers are being used increasingly to deliver insecticides for mosquito control. An unsteady-state Fugacity model, VAPOR-MOM, was developed to simulate temporal variations of insecticide concentrations in air and on the floor, walls, and ceilings. The condensed droplets in each medium are divided into three compartments by generation and disappearance times, including volume, velocity, and evaporation rate. The model was tested by measuring the temporal variation in aerial concentration of applied insecticide dose during the summer in a typical Japanese apartment room. The electric vaporizer was operated continuously for 6 h/d. The predicted time-dependent concentrations in the breathing air compartment was in agreement with measured values. The influences of the air-exchange rate, photodegradation, the transfer rate, and vapor pressure on insecticide concentrations are discussed.
Author Matoba, Yoshihide
Ohnishi, Jun-ichi
Matsuo, Masatoshi
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Cites_doi 10.1016/0045-6535(93)90204-I
10.1021/es00106a001
10.1021/jf00122a017
10.1021/ie50546a056
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Issue 4
Keywords Fugacity
Ambient air concentration
Insecticide
Indoor pollution
Safety
Modeling
Time variation
Vaporization
Language English
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Snippet From a viewpoint of safety assessment of insecticides being released with an electric vaporizer into a room a modified unsteady state Fugacity model...
Electric vaporizers are being used increasingly to deliver insecticides for mosquito control. An unsteady-state Fugacity model, VAPOR-MOM, was developed to...
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SubjectTerms Applied sciences
Atmospheric pollution
Exact sciences and technology
Indoor pollution and occupational exposure
Pollution
Title Indoor simulation of insecticides supplied with an electric vaporizer by the fugacity model
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