Effect of Oxalic Acid and Vermicompost on Colloidal Transport of Lead in Two Types of Soil Texture

Document Type : Research Paper

Authors

1 Professor, Department of Soil Sciences, Faculty of Agriculture, Vali-e-Asr University, Rafsanjan

2 MSc Graduate, Vali-e-Asr University of Rafsanjan

3 Assistant Professor of Agriculture, Payame Noor University, Kerman Province, Rafsanjan Center

Abstract

The present study aimed at investigating the transport of lead by colloids in two types of soils with sandy loam and clay loam textures under vermicompost and organic acid treatments. The experiment was conducted in a complete randomized design. Treatments consisted of three factors including soil texture at two levels (sandy loam and clay loam), additive at five levels (50 and 1000 μM levels of oxalic acid, 1% and 2% weight basis for vermicompost, and a zero level as a control), and the amount of leaching water at 10 levels (10 pore volume). PVC soil columns with an inner diameter of 15 cm and a height of 25 cm were prepared and the treatments were applied, then, leaching was performed based on soil suction measurements at different pore volumes. The results indicated that, after the application of vermicompost to the clay loam soil, leaching colloid from the soil increased and the discharged lead decreased. Adding organic acid increased leaching colloid from the soil; however, treating 50 µM organic acids significantly decreased discharged colloid compared to the control and 1000 µM organic acids treatment. The lowest rates of lead discharge were in the control treatment and the more the concentration of the acid, the more was the discharged lead. However, regarding lead discharge, there was no significant difference among the three levels. In the sandy loam soil, the greatest level of colloid transport belonged to the control, and adding vermicompost significantly prevented colloid transport from the soil, which was compatible with the process of lead discharge. Moreover, adding organic acid decreased colloid transport and the greatest rates of the transportation was recorded in the control treatment that was also compatible with the process of lead discharge. Furthermore, the relation between lead and the discharged colloid was only significant in the sandy loam soil. The results of this study showed that the movement of soluble lead in fine textured soils was negligible and insignificant; however, a substantial amount of lead discharge was detected through colloidal adsorption transport in soil columns. Therefore, it may be concluded that such mechanism would result in lead contamination of groundwater in these types of soils.

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Main Subjects


  1. Aksakal, E. L., S. Sari, I. Angin, and Development. 2016. Effects of vermicompost application on soil aggregation and certain physical properties. Land Degradation. 27: 983-995.
  2. Barral, M. T., E. Buján, R. Devesa, M. L. Iglesias, and M. Velasco-Molina. 20 Comparison of the structural stability of pasture and cultivated soils. Science of the total environment. 378: 174-178.
  3. Barton, C., and A. Karathanasis. 2003. Influence of soil colloids on the migration of atrazine and zinc through large soil monoliths. Water, Air, Soil Pollution. 143: 3-21.
  4. Bhattacharyya, K. G., and S. S. Gupta. 2008. Kaolinite and montmorillonite as adsorbents for Fe (III), Co  (II) and Ni  (II) in aqueous medium. Applied Clay Science. 41: 1-9.
  5. Biggar, J., and D. Nielsen. 1976. Spatial variability of the leaching characteristics of a field soil. Water Resources Research. 12: 78-84.
  6. Bouyoucos, G. J. 1951. A recalibration of the hydrometer method for making mechanical analysis of soils 1. Agronomy journal. 43: 434-438.
  7. Camobreco, V. J., K. Richards, T. S. Steenhuis, J. H. Peverly, and M. B. McBride. 1996. Movement of heavy metals through undisturbed and homogenized soil columns. Soil Science Society of America Journal. 161: 740-750.
  8. Chapman, H. 1965. Cation exchange capacity. In AG, (Eds.) Methods of Soil Analysis: Part 2 Chemical Microbiological Properties. American Society of Agronomy, Inc.
  9. Christensen, B. T. 2001. Physical fractionation of soil and structural and functional complexity in organic matter turnover. European journal of soil science. 52: 345-353.
  10. Clark, F. 1965. Agar plate method for total microbial count. In AG, N. (Eds.) Methods of Soil Analysis: Part 2 Chemical Microbiological Properties. American Society of Agronomy, Inc.
  11. de Jonge, L. W., C. Kjærgaard, and P. Moldrup. 2004. Colloids and colloid‐facilitated transport of contaminants in soils: An introduction. Vadose Zone Journal. 3: 321-325.
  12. DeNovio, N. M., J. E. Saiers, and J. N. Ryan. 2004. Colloid movement in unsaturated porous media: Recent advances and future directions. Vadose Zone Journal. 3: 338-351.
  13. Hashemi nejhad, Y.and M. Gholami. 2008. Introducing an appropriate packing method in disturbed soil columns and its verification to achieve a homogeneous porous media. Water and soil. 22(2): 447-455.
  14. Jones, E. H., and C. Su. 2012. Fate and transport of elemental copper (Cu0) nanoparticles through saturated porous media in the presence of organic materials. water research. 46: 2445-2456.
  15. Lee, S., I.-W. Ko, -H. Yoon, D.-W. Kim, and K.-W. Kim. 2019. Colloid mobilization and heavy metal transport in the sampling of soil solution from Duckum soil in South Korea. Environmental geochemistry health. 41: 469-480.
  16. Lennartz, B., A. H. Haria, and A. C. Johnson. 2007. Flow regime effects on reactive and non-reactive solute transport. Soil Sediment Contamination. 17: 29-40.
  17. Li, Z., and L. Zhou. 2010. Cadmium transport mediated by soil colloid and dissolved organic matter: a field study. Journal of Environmental Sciences. 22: 106-115.
  18. Liu, F., B. Xu, Y. He, P. C. Brookes, C. Tang, and J. Xu. 2018. Differences in transport behavior of natural soil colloids of contrasting sizes from nanometer to micron and the environmental implications. Science of the Total Environment.634:802-810.
  19. Molnar, I. L., W. P. Johnson, J. I. Gerhard, C. S. Willson, and D. M. O'Carroll. 2015. Predicting colloid transport through saturated porous media: A critical review. Water Resources Research. 51: 6804-6845.
  20. Pawlowska, A., I. Sznajder, and Sadowski. 2017. The colloid hematite particle migration through the unsaturated porous bed at the presence of biosurfactants. Environmental Science Pollution Research. 24: 17912-17919.
  21. Poulsen, T. G., P. Moldrup, L. W. de Jonge, and T. Komatsu. 2006. Colloid and bromide transport in undisturbed soil columns: Application of two‐region model. Vadose Zone Journal. 5: 649-656.
  22. Qi, Z., L. Hou, D. Zhu, R. Ji, and W. Chen. 2014. Enhanced transport of phenanthrene and 1-naphthol by colloidal graphene oxide nanoparticles in saturated soil. Environmental science technology. 48: 10136-10144.
  23. Rhoades, J. 1996. Salinity: Electrical conductivity and total dissolved solids. In AG, N. (Eds.) Methods of Soil Analysis: Part 3 Chemical Methods. American Society of Agronomy, Inc.
  24. Schelde, K., L. W. de Jonge, C. Kjaergaard, M. Laegdsmand, and G. H. Rubæk. 2006. Effects of manure application and plowing on transport of colloids and phosphorus to tile drains. Vadose Zone Journal. 5: 445-458.
  25. Slowey, A. J., S. B. Johnson, J. Rytuba, and G. E. Brown. 2005. Role of organic acids in promoting colloidal transport of mercury from mine tailings. Environmental science technology. 39: 7869-7874.
  26. Snehota, M., V. Jelinkova, J. Sacha, M. Frycova, M. Cislerova, P. Vontobel, and J. Hovind. 2015. Experimental investigation of preferential flow in a near-saturated intact soil sample. Physics Procedia. 69: 496-502.
  27. Sprague, L. A., J. S. Herman, G. M. Hornberger, and A. L. Mills. 2000. Atrazine adsorption and colloid‐facilitated transport through the unsaturated zone. Journal of Environmental Quality. 29: 1632-1641.
  28. Strobel, B. W. 2001. Influence of vegetation on low-molecular-weight carboxylic acids in soil solution—a review. Geoderma. 99: 169-198.
  29. Tang, X.-Y., and N. Weisbrod. 2009. Colloid-facilitated transport of lead in natural discrete fractures. Environmental Pollution. 157: 2266-2274.
  30. Thomas, G. W. 1996. Soil pH and soil acidity. In AG, N. (Eds.) Methods of soil analysis: part 3 chemical methods. American Society of Agronomy, Inc.
  31. Tng, K. H., Antony, A., Wang, Y.,and G. L. Leslie. 2015. Membrane ageing during water treatment: mechanisms, monitoring, and control.Advances in Membrane Technologies for Water Treatment, 349-378.‏
  32. Walkley, A. and Black, I. A. 1934. An examination of the Degtjareff method for determining soil organic matter, and a proposed modification of the chromic acid titration method. Soil Science, 37: 29-38.
  33. Wang, C., R. wang, Z. Huo, E. Xie, and H. E. Dahlke. 2020. Colloid transport through soil and other porous media under transient flow conditions-A review. WIREs Water. e1439.
  34. Wang, D., Y. Jin, and D. P. Jaisi. 2015. Effect of size-selective retention on the cotransport of hydroxyapatite and goethite nanoparticles in saturated porous media. Environmental science technology. 49: 8461-8470.
  35. Won, J., X. Wirth, and S. E. Burns. 2019. An experimental study of cotransport of heavy metals with kaolinite colloids. Journal of hazardous materials. 373: 476-482.
  36. Yin, X., B. Gao, L. Q. Ma, U. K. Saha, H. Sun, and G. Wang. 2010. Colloid-facilitated Pb transport in two shooting-range soils in Florida. Journal of Hazardous Materials. 177: 620-625.
  37. Zhang, H., and H. Selim. 2007. Colloid mobilization and arsenite transport in soil columns: Effect of ionic strength. Journal of Environmental Quality. 36: 1273-1280.
  38. Zhao, D., X. Zhao, T. Khongnawang, M. Arshad, and J. Triantafilis. 2018. A Vis‐NIR Spectral Library to Predict Clay in Australian Cotton Growing Soil. Soil Science Society of America Journal. 82: 1347-1357.