How Does the Amount and Composition of PM Deposited on Platanus acerifolia Leaves Change Across Different Cities in Europe?
Chiara BaldacchiniAna CastanheiroNairuhi MaghakyanGregorio SgrignaJolien VerhelstRocío AlonsoJorge H AmorimPatrick BellanDanijela Đunisijević BojovićJürgen BreusteOliver BühlerIlie C CântarPaloma CariñanosGiulia CarrieroGalina ChurkinaLucian DincaRaffaela EspositoStanisław W GawrońskiMaren KernDidier Le ThiecMarco MorettiTine NingalEleni C RantzoudiIztok SinjurBiljana StojanovaMira Aničić UroševićVioleta VelikovaIvana ŽivojinovićLilit SahakyanCarlo CalfapietraRoeland SamsonPublished in: Environmental science & technology (2017)
Particulate matter (PM) deposited on Platanus acerifolia tree leaves has been sampled in the urban areas of 28 European cities, over 20 countries, with the aim of testing leaf deposited particles as indicator of atmospheric PM concentration and composition. Leaves have been collected close to streets characterized by heavy traffic and within urban parks. Leaf surface density, dimensions, and elemental composition of leaf deposited particles have been compared with leaf magnetic content, and discussed in connection with air quality data. The PM quantity and size were mainly dependent on the regional background concentration of particles, while the percentage of iron-based particles emerged as a clear marker of traffic-related pollution in most of the sites. This indicates that Platanus acerifolia is highly suitable to be used in atmospheric PM monitoring studies and that morphological and elemental characteristics of leaf deposited particles, joined with the leaf magnetic content, may successfully allow urban PM source apportionment.