Dipartimento di Chimica Analitica, Università di Torino, Via P. Giuria 5, Turin, Italy.
Chemosphere. 2011 Jun;83(11):1480-5. doi: 10.1016/j.chemosphere.2011.02.093. Epub 2011 Apr 8.
We found that the photochemical generation of reactive transients such as singlet oxygen and triplet states upon irradiation of different lake water samples is mostly accounted for by components smaller than 0.10 μm. Larger components often showed a much lower absorption and/or scattering of radiation compared with the smaller ones, with one exception where the minor to negligible photochemical activity of larger species was associated with significant radiation absorption/scattering. It is also shown that filtration of the lake water samples at 0.10 μm was able to effectively remove the suspended particles, differently from the usually suggested filtration at 0.45 μm.
我们发现，不同湖水样本在辐照时会产生光化学生成的活性瞬变物，如单线态氧和三重态，这些主要是由小于 0.10 微米的成分引起的。较大的成分通常表现出比小成分低得多的辐射吸收和/或散射，只有一个例外，即较大物质的次要到可以忽略不计的光化学生物活性与显著的辐射吸收/散射有关。研究还表明，与通常建议的 0.45 微米过滤相比，对湖水样本进行 0.10 微米过滤能够有效地去除悬浮颗粒。
