Geographical distribution of benzene in air in northwestern Italy and personal exposure.

Abstract

Benzene is a solvent strictly related to some industrial activities and to automotive emissions. After the reduction in lead content of fuel gasoline, and the consequent decrease in octane number, an increase in benzene and other aromatic hydrocarbons in gasoline occurred. Therefore, an increase in the concentration of these chemicals in the air as primary pollutants and as precursors of photochemical smog could occur in the future. The objectives of this study were to describe the benzene air pollution at three sites in northwestern Italy throughout 1991 and 1994; to examine the relationship between benzene air pollution in indoor, outdoor, and personal air as measured by a group of nonsmoking university students; and to determine the influence of environmental tobacco smoke on the level of benzene exposure in indoor air environments. The results indicate a direct relationship between population density and levels of contamination; an indoor/outdoor ratio of benzene air pollution higher than 1 during day and night; a similar level of personal and indoor air contamination; and a direct relationship between levels of personal exposure to benzene and intensity of exposure to tobacco smoke. Human exposure to airborne benzene has been found to depend principally on indoor air contamination not only in the home but also in many other confined environments.

Air pollution, aeroallergens and admissions to pediatric emergency room for respiratory reasons in Turin, northwestern Italy

“…In experimental studies, O 3 can increase airway inflammation [ 39 ] and can worsen pulmonary function and gas exchange [ 40 ]. In addition, exposure to elevated concentrations of tropospheric O 3 has been associated with numerous adverse health effects, including the induction [ 26 ] and exacerbation [ 27 , 28 ] of asthma, pulmonary dysfunction [ 33 , 34 ] and hospitalization for respiratory reasons [ 31 ]. In our study, the apparent protective effect of O 3 seems to be due to a confounding by meteorology, or to the fact that O 3 acts as a mediator of the effect of temperature.…”

Impact of gasoline inhalation on some neurobehavioural characteristics of male rats

“…The change from leaded to unleaded gasoline, in fact, represents a transformation of a risk factor for the human population chronically exposed to urban air polluted by automobile smokes [ 7 ].…”

Exposição Ocupacional a Gasolina: Um Estudo Transversal

“…Entretanto seu vapor não deve ser aspirado já que o mesmo possui componentes tóxicos, altamente carcinogênicos podendo ser o causador de diversos tipos de cânceres, como leucemia (GILLI et al, 1996). Devido ao alto poder de toxicidade, a ação do benzeno independe do meio de contato.…”