The concentration of hydrogen peroxide (H2O2) in rainwater samples collected between April 2003 and April 2004 in downtown São Paulo were determined. The concentrations of H2O2 ranged from 2.29 to 48.6 μ mol L-1, with an average value (n = 70) of 13.1 (±11.3) μ mol L-1. The higher concentrations were observed in spring and summer. The volumeweighted mean (VWM) of the free H+ was 6.5 μ mol L-1, corresponding to a pH of 5.2. The analysis of SO2 -4, NO- 3, and HCOO-, in the same set of samples, showed an average concentration of 11.7 (±10.9), 20.0 (±18.0), and 6.18 (±12.4) μ mol L-1, respectively. The HCOO- concentrations showed correlation (r = 0.43) with H2O2, which can indicate reactions in aqueous phase where these two species are formed.
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Santos, M.A., Pedrotti, J.J., Fornaro, A. (2007). Evaluation of hydrogen peroxide in rainwater in downtown São Paulo. In: Morrison, G.M., Rauch, S. (eds) Highway and Urban Environment. Alliance For Global Sustainability Bookseries, vol 12. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-6010-6_12
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