1. Department
of Chemistry “Giacomo Ciamician”, C.I.R.I. Energia Ambiente
and C.I.R.S.A., Università di Bologna, Ravenna Campus, Via S.
Alberto 163, 48123, Ravenna, Italy
2. Department
of Chemical and Environmental Engineering, University of Nottingham, Nottingham NG7 2RD, United Kingdom
3. Institute of Biometeorology (IBIMET), National Research Council (CNR), Via G. Caproni 8, 50145 Florence, Italy