The Effects of Soft Leaching with Citric Acid on Soil P Release Characteristic

Abstract:

In this study, the soil column experiment was adopted to investigated the release characteristic of P from soil by citric acid leaching. The results showed that the P release characteristics were different from each other under various citrate concentrations. At high concentration (50 mM) treatment, P concentration of effluents increased rapidly with effluent volume at the beginning, reached the maximum value after approximately 150 ml solution had passed through the columns. For the column treated with 5 mM of citric acid, the P in leachates was increased gradually to the maximum concentration, and then approached a relatively stable level during the 1000-3050 ml effluent volume. For low concentration (0.5 mM) treatment, the level of P in the effluents has always been very low, though a small peak was observed during the leaching.

• Periodical: Applied Mechanics and Materials (Volume 692)
• Pages: 172-175
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.692.172
• Online since: November 2014
• Authors: Chen Feng, Jia Ming Zheng, Liang Shan Feng, Xiu Jie Yu, Peng Fei Wang, Zhan Xiang Sun*, Lian Zhu Guan
• Keywords: Citric Acid, Column Leaching, Effluent, Phosphorus, Release Characteristic

References

[1] J. Elser, E. Bennett. Phosphorus cycle: A broken biogeochemical cycle. Nature, 478(2011) 29–31.

DOI: 10.1038/478029a

[2] D.L. Jones, P.G. Dennis, A.G. Owen, P.A.W. van Hees. Organic acid behavior in soils-misconceptions and kowledge gaps. Plant Soil, 248 (2003) 31-34.

DOI: 10.1023/a:1022304332313

[3] J. Gerke. Phosphate, iron, and aluminium in the soil solution of three different soils in relation to varying concentration of citric acid. Z. Pflanzenernähr. Bodenk., 155(1992) 339-343.

DOI: 10.1002/jpln.19921550417

[4] A. Violante, C. Colombo, A. Buondonno. Competitive adsorption of phosphate and oxalate by aluminum oxides. Soil Sci. Soc. Am. J., 55 (1991) 65-70.

DOI: 10.2136/sssaj1991.03615995005500010011x

[5] L. Ström, A.G. Owen, D.L. Godbold, D.L. Jones. Organic acid mediated P mobilization in the rhizosphere and uptake by maize roots. Soil biol. biochem., 34(2002) 703-710.

DOI: 10.1016/s0038-0717(01)00235-8

[6] S.E. Johnson, R.H. Loeppert. Role of organic acids in phosphate mobilization from iron oxide. Soil Sci. Soc. Am. J., 70(2006) 222-234.

DOI: 10.2136/sssaj2005.0012

[7] T.C. Zhang, M.F. Dahab, G.S. Nunes, C. Hu, R. Surampalli. Phosphorus fate and transport in soil columns loaded intermittently with influent of high phosphorus concentrations. Water Environ. Res., 79(2007) 2343-2351.

DOI: 10.2175/106143007x184195

[8] D.L. Sparks. Kinetics of ionic reactions in clay minerals and soils. Adv. Agron., 38(1985) 231-266.

[9] H.Q. Hu, Y. Li, J.Z. He. Interaction of organic acids and phosphorus in soils. Chin. J. Soil Sci., 35(2) (2006) 222-229 (in Chinese).