Assessment of the photosynthetically active incidentradiation on outdoor photobioreactors using oxalicacid/uranyl sulfate chemical actinometer

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• 作者：Sá ; nchez Mir&oacute ; n ; A. ; Molina Grima ; E. ; Ferná ; ndez Sevilla ; J.M. ; Chisti ; Y. ; Garcí ; a Camacho ; F.
• 关键词：actinometry ; incident photon flux ; photobioreactor
• 刊名：Hydrobiologia
• 出版年：2000
• 出版时间：2000
• 年：2000
• 卷：12
• 期：3/5
• 页码：385-394
• 全文大小：110 KB
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Hydrobiology
  Ecology
  
• 出版者：Springer Netherlands
• ISSN：1573-5117

文摘

A simple actinometric method was evaluated formeasuring the photosynthetically active incidentphoton flux on outdoor photobioreactors. The method isbased on uranyl sulfate catalyzed photodecompositionof oxalic acid in presence of light. The uranyl–oxalate chemical actinometer absorbs radiation ofwavelengths below 535 nm. In the present work, thephotobioreactor wall material did not transmit lightenergy of wavelengths below 350 nm and the effectiveabsorptivity method was used to evaluate the photonflux between 350–535 nm. The standard solar spectrumof the American Society for Testing and Materials(ASTM) was employed for estimating the ratio betweenthe photosynthetically active radiation (400–700 nm)and the solar radiation in the 350–535 nm range. Thisratio (2.21) was taken to be equal to the quotientbetween the photosynthetically active radiation (PAR)and the incident photon flux on the photobioreactor'ssurface (for the solar radiation between 350–535 nm).PAR measurements with 4&pgr; spherical and 2&pgr;quantum sensors were used to validate the method.