Table 1 Net snow masses on the entire bottom cold plate and \({{\rm{NO}}}_{3}^{-}\), \({{\rm{SO}}}_{4}^{2-}\) and Al3+ concentrations in the water obtained by the melted snow for the different cases: (a) without the aluminum target and with the aluminum target located at the (b) beginning, (c) middle, and (d) end of the filament.
Cases Unit | Snow mass (g) | \({{\bf{NO}}}_{{\bf{3}}}^{{\boldsymbol{-}}}\) concentration (ppm) | \({\bf{s}}{{\bf{o}}}_{{\bf{4}}}^{{\bf{2}}{\boldsymbol{-}}}\) concentration (ppm) | Al3+ concentration (ppm) |
|---|---|---|---|---|
(a) | 1.8977 ± 0.1960 | 86.23 ± 2.67 | 0.76 ± 0.03 |  |
(b) | 2.9344 ± 0.2776 | 38.36 ± 0.66 | 0.21 ± 0.01 | 21.58 ± 0.32 |
(c) | 3.3271 ± 0.3954 | 42.23 ± 1.45 | 0.29 ± 0.04 | 24.39 ± 0.62 |
(d) | 3.6910 ± 0.4818 | 64.00 ± 1.83 | 0.56 ± 0.06 | 18.44 ± 0.15 |
