Phosphorus fractions in the sediment of a tropical reservoir, India: Implications for pollution source identification and eutrophication.

Autor: Saha A; Regional Centre of ICAR-Central Inland Fisheries Research Institute, Bangalore, 560089, Karnataka, India. ajoysahacob@gmail.com., Jesna PK; Regional Centre of ICAR-Central Inland Fisheries Research Institute, Bangalore, 560089, Karnataka, India., Ramya VL; Regional Centre of ICAR-Central Inland Fisheries Research Institute, Bangalore, 560089, Karnataka, India., Mol SS; Regional Centre of ICAR-Central Inland Fisheries Research Institute, Bangalore, 560089, Karnataka, India., Panikkar P; Regional Centre of ICAR-Central Inland Fisheries Research Institute, Bangalore, 560089, Karnataka, India., Vijaykumar ME; Regional Centre of ICAR-Central Inland Fisheries Research Institute, Bangalore, 560089, Karnataka, India., Sarkar UK; ICAR - Central Inland Fisheries Research Institute, Barrackpore, Kolkata, 700120, West Bengal, India., Das BK; ICAR - Central Inland Fisheries Research Institute, Barrackpore, Kolkata, 700120, West Bengal, India.
Jazyk: angličtina
Zdroj: Environmental geochemistry and health [Environ Geochem Health] 2022 Mar; Vol. 44 (3), pp. 749-769. Date of Electronic Publication: 2021 May 29.
DOI: 10.1007/s10653-021-00985-0
Abstrakt: Eutrophication level in lakes and reservoirs depends on both internal and external phosphorus (P) load. Characterization of sediment P fractionation and identifying the P pollution sources are important for assessing the bio-availability of P and the dominant P source, for effectively controlling the water pollution. For determining the availability and sources of sediment P and eutrophication status, spatio-temporal variation in different P fractionation of sediment of hyper-eutrophic Krishnagiri reservoir, Tamil Nadu, India, was investigated. Sediment average total P (TP) content ranged from 4.62 to 5.64 g/kg. Main phosphorus form was the inorganic P (IP), and it makes up to 73.4-87.7% of TP. Among the different P fraction, viz. calcium bound (Ca-P), iron bound (Fe-P), aluminium bound (Al-P), exchangeable (Ex-P) and Organic-P (Org-P), Ca-P was the dominating fraction in both IP and TP. Trend of IP fraction was as follows: Ca-P > Fe-P > Al-P > Ex-P in pre-monsoon season, Fe-P > Ca-P > Al-P > Ex-P in monsoon and Ca-P > Al-P > Fe-P > Ex-P in post-monsoon. Overall the trend was as follows Ca-P > Fe-P > Al-P > Org-P > Ex-P. Bio-available-P (BAP) fractions ranged from 35.2 to 64.0% of TP, indicating its comparative higher value. Pearson's correlation matrix revealed that there was strong correlation among the different P fractions. Factor analysis indicates that different fractions of P were the dominating factor than the other sediment parameters. The observed variation in sediment P fractionation indicate the differences in source and characterization of P which is very helpful for implementation of effective management practices in controlling pollution that arises due to phosphorus in this hyper-eutrophic reservoir.
(© 2021. The Author(s), under exclusive licence to Springer Nature B.V.)
Databáze: MEDLINE
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