Effects of pH on release of phosphorus from rock phosphate at different temperatures against the various time intervals involved

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Effects of pH on release of phosphorus from rock phosphate at different temperatures against the various time intervals involved

Kashifa Naghma Waheed, Nasreen Ijaz, Zehra Khatoon, Sikender Hayat, Umara Nuzhat
Int. J. Biosci.10( 1), 202-209, January 2017.
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This study was undertaken to deduce the supply of phosphorous-phosphates from low grade Rock phosphates in aquatic media and to ascertain the best pH range out of several pH ranges so as to apply this research further on fish growths in ponds environment. In this regard, an attempt was made to study the efficiency of phosphorus released from Rock Phosphate at various temperatures and various pH ranges, i.e., 6-7, 7-8 and 8-9.The experiments were conducted during winter and summer season for a 96 hourly and then five weeks duration period. The phosphorus released concentrations were measured spectrophotometrically by ascorbic acid method. The results incurred, from the summer as well as from the winter experiments, revealed a maximum release of phosphorus fromT4treatmentsindicating that the higher pH (alkaline) range: 8-9 increased the rate of phosphorus release from Rock phosphate. The phosphate ranged between 0.06 to 0.40 mgL−1values from all treatments during the study period with the highest at high temperature during summer season. Hence, Rock phosphate enriched soils could be an alternative and cheaper source of phosphorus fertilizer to utilize low-grade Rock phosphates efficiently for enhancing fish production for alkaline soils/ waters available all over the Punjab.


Boyd EC. 1982. Water Quality Management for Pond Fish Culture, 56 publisher Elsevier Scientific Publishing Company, Amsterdam, New York.

Boyd EC. 2000. Water Quality: An Introduction, published June 30th 2000 by Springer (first published January 15th 2000).

Boyd CE, Tucker CS. 2009. Pond Aquaculture Water quality Management, Kluwer Academic Publishers, Boston, Massachusetts, USA.

Carignan R, Vaithiyanathan P. 1999. Influence of pH and phosphate buffering by fluvial sediments. Phosphorus availability in Parana floodplain lakes (Argentina): Limnology and Oceanography 44(6), 1540-1548.

Chakrabarty D. 2007. Comparative Utilization of Phosphorus from Sedimentary and Igneous Phosphate Rock by Major Biotic Components of Aquatic Ecosystem, International Journal of Environmental Science and Technology. 4(1), 43-48. http://dx.doi.org/10.1007/BF03325960.

Chen M, Chen J, Sun F. 2008. Agricultural phosphorus flow and its environmental impacts in China. Science of the Total Environment, 405, 140–152.

Cordell D, Drangert JO, White S. 2009. The story of phosphorus: global food security and food for thought. Global Environmental Change, 19, 292–305. http://dx.doi.org/10.1016/j.gloenvcha.2008.10.009.

Eaton AD, Clescere LS, Rice EW, Greenberg AE. 2012. Standard Methods for the Examination of Water and Waste Water. American Public Health Association (A.P.H.A.), 22nd Ed., Washington.

Froelich PN. 1988. Kinetic control of dissolved phosphate in natural rivers and estuaries: A primer on the phosphate buffer mechanism, Limnology and Oceanography 33(4)21, 649-668.

Jana BB, Sahu SN. 1994. Effect of Frequency of Rock Phosphate Application in Carp Culture. Fisheries and Limnology Research Unit, India 122(4), 313-321. http://dx.doi.org/10.1016/0044-8486(94)90340.9

Kann J, Walker WJ. 1999. Journal of Sea Research, 18(3/4), 286-311.

Liu Y, Villalba G, Ayres RU, Schroder H. 2008. Global phosphorus flows and environmental impacts from a consumption perspective. Journal of Industrial Ecology 12, 229–247. http://dx.doi.org/10.1111/j.1530-9290.2008.00025.x.

Mayer M, Glass SP. 1980. Buffering of Silica and phosphate in turbid river. Limnology and oceanography, 2512-22 P.

Rosen CJ, White DB. 1999. “Preventing Pollution Problems from Lawn and Garden Fertilizers.” University of Minnesota Extension Service. http://www.extension.umn.edu/distribution/horticulture/DG2923.html

Smil V. 2000. Phosphorus in the environment-natural flows and human interferences. Annual Review of Energy and the Environment 25, 53–88. http://dx.doi.org/1056-3466/00/1129-0053.

Steel RGD, Torrie JH, Dinkkey DA. 1996. Principals and Procedures of Statistics, 2nd Ed., McGraw-Hill Book Co., Singapore.