Characteristics of Charged Aerosols Generated by Highvoltage Power Lines

초록

We investigated the characteristics of charged aerosols produced by high-voltage power lines (HVPLs) to explore the effects on respiratory disease incidence among those who handle HVPLs. Chargedaerosol currents (fA) and charged aerosol concentrations (ions/cm3) were measured continuously at 10-second intervals over 24 hours at 12 sites (11 adjacent to HVPLs (exposed sites) and 1 control site). The effective levels of aerosol currents were 2.7 times (range, 1.3?.2) higher at the exposed sites in comparison to the control site. This pattern of relative enhancement at exposed sites was seen consistently in all measurements. Differences in charged aerosol concentrations were 1.7 times higher at the exposed site. Correlation analysis among all important variables (charged aerosol currents, concentrations, electric fields, magnetic fields, PM10, PM2.5, temperature, and humidity) revealed strong positive correlations between (1) currents and concentration, (2) currents and magnetic field, (3) humidity and concentration, and (4) humidity and PM10, while negative correlations were observed between (1) charged aerosol concentrations and wind velocity and (2) wind velocity and humidity. We estimated the production of charged aerosols from HVPLs and found that people who work with HVPLs are highly likely to be exposed to charged aerosols."