Abstract
As we have reported monthly means of the sunlight UV energy in the FRA-greenhouse, monthly mean of the outdoor UV energy can be estimated from the relationship between outside UV intensity and UV intensity inside the FRA-greenhouse. In our measurement UV intensity on the outside was two times higher than UV intensity inside FRA-greenhouse in Chigasaki city. Thus the outdoor UV energy was estimated two times higher than the UV energy inside the FRA-greenhouse. In this way, the outside UV energy could be estimated by using this relation. We investigated the quantitative photolysis rate of aqueous solution of naproanilide (2-(2-naphthoxy)propionanilide), NOP (2-(2-naphthoxy)propionic acid) and chlornitrofen (2, 4, 6-trichlorophenyl 4-nitrophenyl ether) exposed to outdoor sunlight. The results showed that photolysis rate of naproanilide fitted to the exponential function, and its PL50 value on the outside was the same as that inside the FRA-greenhouse. Delaying phenomenon was detected in the initial photolysis of NOP and chlornitrofen. It is not clear how they occur, so far. A probable reason is that another material is activated by the light and this activated material makes an opportunity for the photolysis of NOP and chlornitrofen. Once the reaction started, however, the photolysis rate approximated to an exponential function.
