Photoinduced Generation of Hydroxyl Radical in Natural Waters - Photobiogeochemistry of Organic Matter - page 239

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Table 4 The quantum yield of HO ( Φ HO ) of nitrite photolysis as a function of pH and temperature (T)

T (K) pH

4 5 6 7 8 9 10 11

For wavelength 308 nm
278 0.047 ± 0.004 0.037 ± 0.002 0.039 ± 0.005 0.040 ± 0.005 0.040 ± 0.002 0.039 ± 0.001 0.034 ± 0.002 0.030 ± 0.003

298 0.091 ± 0.011 0.080 ± 0.007 0.068 ± 0.004 0.068 ± 0.009 0.071 ± 0.009 0.068 ± 0.008 0.060 ± 0.007 0.046 ± 0.006

318 0.100 ± 0.011 0.085 ± 0.005 0.081 ± 0.006 0.082 ± 0.011 0.079 ± 0.003 0.080 ± 0.003 0.076 ± 0.003 0.069 ± 0.005

353 0.160 ± 0.011 0.159 ± 0.008 0.148 ± 0.006 0.141 ± 0.007 0.143 ± 0.003 0.132 ± 0.005 0.125 ± 0.003 0.115 ± 0.004

For wavelength 351 nm
278 nd nd nd nd 0.027 ± 0.003 nd nd nd

288 nd nd nd nd 0.038 ± 0.004 nd nd nd

298 nd nd nd nd 0.046 ± 0.003 nd nd nd

308 nd nd nd nd 0.058 ± 0.002 nd nd nd

318 nd nd nd nd 0.078 ± 0.003 nd nd nd

328 nd nd nd nd 0.091 ± 0.010 nd nd nd

338 nd nd nd nd 0.096 ± 0.003 nd nd nd

348 nd nd nd nd 0.118 ± 0.008 nd nd nd

358 nd nd nd nd 0.153 ± 0.009 nd nd nd

nd means 'not detected'
Data source Zellner et al. ( 1990 )