Comprehensive Evaluation of Dust Retention and Metal Accumulation by the Leaves of Roadside Plants in Hangzhou among Seasons

The auto exhaust and dust derived from increased traffic volumes have led to an increasing level of atmospheric particulates in urban areas, which become a primary pollutant ambient air zones. Roadside plants can effectively retain clean the via foliar capture road dust. Five common roadside Hangzhou were selected evaluate their capacity for retention particulate matter (PM) accumulation metals. results showed that PM different varied greatly, as was case with Loropetalum chinense var. rubrum Yieh, Osmanthus fragrans (Thunb.) Loureiro, Pittosporum tobira Ait, Photinia × fraseri Dress Cinnamomum camphora (L.) Presl. In addition, amounts particles retained by among seasons, highest winter (12.19 g·m−2) lowest spring (6.89 g·m−2). solids on leaf surface mainly irregular particles, such mineral fragments, soot aggregates, fly ash particles. Meanwhile, these plant species accumulate heavy metals attached leaves five tree had copper (Cu) cadmium (Cd). Among species, L. P. strongest comprehensive adsorb shed light rational selection plants, both ornaments purify suppression subtropical