کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1276084 | 1497545 | 2012 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Enhancement of hydrogen production by the filamentous non-heterocystous cyanobacterium Arthrospira sp. PCC 8005 Enhancement of hydrogen production by the filamentous non-heterocystous cyanobacterium Arthrospira sp. PCC 8005](/preview/png/1276084.png)
The efficiency of hydrogen production by different cyanobacterial species depends on several external factors. We report here the factors enhancing hydrogen production by filamentous non-heterocystous cyanobacterium Arthrospira sp. PCC 8005. Cells adapted to dark-anaerobic conditions produced hydrogen consistent with increased hydrogenase activity when supplemented with Fe2+. Stimulation of hydrogen production could be achieved by addition of reductants, either dithiothreitol or β-mercaptoethanol with higher production observed with the latter. Additionally, Fe2+ and β-mercaptoethanol added to nitrogen- and sulphur-deprived cells significantly stimulated H2 production with maximal value of 5.91 ± 0.14 μmol H2 mg Chla−1 h−1. Glucose and a small increase of osmolality imposed by either NaCl or sorbitol enhanced hydrogen production. High rates of hydrogen production were obtained in cells adapted in nitrogen-deprived medium with neutral and alkaline external pH, significant decrease of hydrogen production occurred under acidic external pH.
► Arthrospira sp. PCC 8005 has a strong potential as hydrogen producer.
► Addition of Fe2+ and beta-mercaptoethanol increases hydrogen production by 2-fold.
► High rate of hydrogen production at 5.91 μmol mg Chla−1 h−1 can be achieved.
Journal: International Journal of Hydrogen Energy - Volume 37, Issue 24, December 2012, Pages 18791–18797