International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 6
First page : (899) Last page : (907)
Article doi: http://dx.doi.org/10.18782/2320-7051.5461
Complexation Behavior of Humic and Fulvic Acids with Metal Ions and their Assessment by Stability Constants
M. Eshwar1*, M. Srilatha1, K. Bhanu Rekha2 and S. Harish Kumar Sharma1
1Department of Soil Science and Agricultural Chemistry, College of Agriculture, PJTSAU, Rajendranagar, Hyderabad- 500 030, Telangana
2Department of Agronomy, Agriculture College, Palem, Nagarkurnool
*Corresponding Author E-mail: maryalaeshwar@gmail.com
Received: 31.07.2017 | Revised: 8.08.2017 | Accepted: 10.08.2017
ABSTRACT
The present study was carried out at the laboratory, Department of Soil Science and Agricultural Chemistry, College of Agriculture, Rajendranagar. The numerical value of stability constants, referred to as Log k, is of significance in predicting the solubility and movement of micronutrients in soils. Stability constants were determined for Fe (II), Cu (II), Mn (II) and Zn (II) metal ion complexes with humic and fulvic acid at pH 7.0 and at 300C. The results revealed that for humic acid the log K values were 5.84, 5.97, 5.94 and 5.84 for Fe (II), Cu (II), Mn (II) and Zn (II) respectively. In case of fulvic acid the log K values were 5.93, 5.96, 6.01 and 5.89 for Fe (II), Cu (II), Mn (II) and Zn (II) respectively.
Key words: Humic acid (HA), Fulvic acid (FA), Metal ions, Stability constants.
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Eshwar, M., Srilatha, M., Rekha, K.B. and Sharma, S.H.K., Complexation Behavior of Humic and Fulvic Acids with Metal Ions and Their Assessment by Stability Constants, Int. J. Pure App. Biosci.5(6): 899-907 (2017). doi: http://dx.doi.org/10.18782/2320-7051.5461
