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Study on different forms of phosphorus and parameters related to their releasing in the surface sediments of the southern Caspian Sea
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Leila Niazi   , Hassan Nasrollahzadeh Saravi , Mohammad Javvad Chaichi , Shaaban Najafpour |
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Abstract: (5699 Views) |
| This paper presents distribution of phosphorus (P)(total P, organic and inorganic P) and parameters related to their releasing to the water column in the southern of the Caspian Sea. 36 samples of surface sediments(with triplicate) were collected from four sampling stations namely Anzali, Tonekabon, Noshahr andAmirabad at depths of 5, 10, 20 m during summer 2013. Several forms of the phosphorus in sediment were separated and extracted according to sequential extraction method. In the other hand, the concentration of Al, Fe and Ca and some parameters like Eh, EC and pH were measured for finding their relation with phosphorus releasing. Results showed that the most abundant forms of phosphorus were Ca-P(96.02%) and loosely-P(0.19%) has the lowest amount. Inabundances of different forms of phosphorus follow the order: Ca-P>Org-P>Fe-P>Al-P>Loosely-P. In conclusion, the high amount of pH in sediment and anaerobic condition(Eh<0) release the Fe bound P(2.7%) and loosely bound P to water column. |
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| Keywords: Phosphorus, Surface sediments, Caspian Sea, Iran. |
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Full-Text [PDF 288 kb]
(1409 Downloads)
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Type of Study: Research |
Subject:
Fisheries
Received: 2015/01/6 | Accepted: 2015/01/6 | Published: 2015/01/6
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