[PDF]    http://dx.doi.org/10.3952/lithjphys.48408

Open access article / Atviros prieigos straipsnis

Lith. J. Phys. 48, 367–374 (2008)

V. Valuntaitė and R. Girgždienė
Vilnius Gediminas Technical University, Saulėtekio 11, LT–10223 Vilnius, Lithuania
E-mail: vaida.valuntaite@fm.vgtu.lt

Received 11 September 2008; revised 18 November 2008; accepted 4 December 2008

The variations of ozone and aerosol particles as possible pollutants in the vicinity of high-voltage transmission lines are presented and discussed. The ozone, aerosol particle (D > 0.4 μ\mum) number concentrations and meteorological parameters near two high-voltage 330 kV transmission lines and at the “background” site at the 220 m distance from the lines were investigated. During the investigation period the average ozone concentration close to high-voltage lines was higher than the “background” concentration and the instantaneous ozone concentration level was higher by 38% in separate cases, especially during the nighttime. The influence of meteorological parameters on the ozone concentration variation is discussed and it is determined that the relative humidity, wind speed and direction were the most important parameters causing the ozone concentration increase in the surroundings of transmission lines in nonurbanized areas. The analysis of aerosol particle number concentration data showed that the high-voltage lines were not the source of aerosol particles in the area of the experiment.
Keywords: high-voltage transmission lines, ozone, aerosol particles, concentration, meteorological parameters
PACS: 92.60.Sz, 52.80.Hc, 92.60.Mt

V. Valuntaitė, R. Girgždienė
Vilniaus Gedimino technikos universitetas, Vilnius, Lietuva

Aptariamas potencialus vietinis oro taršos šaltinis – aukštos įtampos elektros perdavimo linijos. Pateikti ozono ir aerozolio dalelių, kaip galimų teršalų prie aukštos įtampos linijų, koncentracijos tyrimo rezultatai. Ozono ir aerozolio dalelių (D > 0,4 μ\mum) skaitinės koncentracijos bei meteorologinių parametrų matavimai atlikti 2007 m. rugsėjo mėn. Utenos rajone prie dviejų 330 kV aukštos įtampos elektros perdavimo linijų. Tuo pačiu metu ozono koncentracija matuota ir 220 m atstumu nuo linijų, ir ji darbe traktuojama kaip „foninė“. Vidutinė ozono koncentracija eksperimento metu prie aukštos įtampos linijų buvo didesnė nei foninė. Parodyta, kad prie aukštos įtampos elektros perdavimo linijų tam tikrais atvejais (pvz., nakties metu) stebimas ozono koncentracijos padidėjimas iki 38 % palyginus su „fonine“. Aptariama meteorologinių parametrų įtaka ozono koncentracijos pokyčiams. Nustatyta, kad oro drėgnis, vėjo greitis ir kryptis yra svarbiausi parametrai, sąlygojantys ozono padidėjimą aukštos įtampos linijų aplinkoje neurbanizuotose vietovėse. Aerozolio dalelių (D > 0,4 μ\mum) skaitinės koncentracijos duomenų analizė parodė, kad aukštos įtampos linijos arba nėra lokalus šių dalelių šaltinis, arba jo nebuvo galima įvertinti naudotu metodu. Aerozolio dalelių koncentracijos pokyčius eksperimento metu lėmė oro masių pernašų kaita.

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