Evaluation of Digestion Procedures on Heavy Metals in Soil of a Dumpsite in Ibadan, South-western Nigeria


  • Segun Michael Abegunde 1Department of Science Technology, Federal Polytechnic, Ado-Ekiti, Ekiti State
  • Adedayo Olamide Oyebanji Department of Chemical Sciences, Joseph Ayo Babalola University, Ikeji Arakeji, Osun State
  • Oladele Osibanjo Department of Chemistry, University of Ibadan, Nigeria


Digestion procedure, Extractants, Heavy metals, Dumpsite, Soil


Acid digestion is important in solubilizing metal ions in heavy metals determination. A number of procedures exist and the one used is dependent on different factors. This work is aimed at investigating the performance of three different acid digestion procedures (Aqua Regia, 2 M HNO3 and HNO3/HClO4) for the extraction of Pb, Cd and Zn in soil sample from an abandoned dumpsite of a lead-acid producing industry in Lalupon, Oyo State. Heavy metals in soil extracts were determined using atomic absorption spectrophotometer. Results revealed that Aqua Regia gave the highest content level of Pb and Cd, HNO3/HClO4 showed best performance for Zn while 2
M HNO3 had the least performance for the metals considered. Result of 2 M HNO3 was less than the other two and could not represent total metal content of the soil. Without losing focus of the objectives of research, variation in the effectiveness of acid digestion procedures should be borne in mind when making a choice.


Abegunde, S. M., Adejuwon, O. M., & Olorunfemi, T. O. (2017). Safety Assessment of Hand-Dug Well Water Samples from Selected Towns in

Ekiti State, Nigeria. Journal of Advanced Research in Applied Chemistry & Chemical Engineering, 4(1&2). Retrieved from http://science.


Abegunde, S. M. & Ayodele-Oduola, R.O. (2015).Comparison of efficiency of different solvents used for the extraction of phytochemicals from

the leaf, seed and stem bark of Calotropis Procera. International Journal of Science and Research (IJSR), 4(7), 835 - 838.

Alam, M. G. M. & Tokunaga, S., (2006). Chemical extraction of arsenic from contaminated soil. Journal of environmental science and health,

Part A: toxic/hazardous substances and environmental engineering, 41(4), 631 - 643.

Argon Lab Systems, Argon Technology. (2007). Retrieved from https://pdfs.semanticscholar.org/de9e/2eee9cd723970ca6275bfe5b629d


Guveni, D. E. & Akinci, G. (2011). Comparison of acid digestion techniques to determine heavy metals in sediment and soil samples. Gazi

University Journal of Science, 24(1), 29 – 34.

Hlavay, J., Prohaska, T. M., Weisz, M., Wenzel, W. W., & Stingeder G. J. (2004). Determination of trace elements bound to soils and sediment

fraction. Pure and Applied Chemistry (IUPAC Technical Report), 76(2), 415 - 442.

Kaasalainen, M. & Yli-Halla M., (2003). Use of sequential extraction to assess metal partitioning in soils. Environmental pollution, 126(2),


Kislik, V. (2002). “Competitive complexation/solvation” Theory of solvent extraction: II, solvent extraction of metals by acidic extractions.

Separation Science and Technology, 37(11), 2623 - 2657.

Nogales, R., Gallardo-Lara, F., Benitez, E., Soto, J., Hervas, D., & Polo, A. (1997). Metal extractability and availability in soil after heavy

application of either nickel or lead in different forms. Water, Air, and Soil Pollution, 94(1-2), 33 –44.

Roundhill, D. M., Slangi, I. B., Memon, S., Bhanger, M. I. & Yilmaz, M. (2009). The liquid-liquid extraction of toxic metals. Pakistan Journal of

Analytical & Environmental Chemistry, 10(1&2), 1-13.

Szakova, J., Miholova, D., Tlustos, P., Sestakova, I., & Frkova, Z. S. (2010). Effect of soil properties and sample preparation on extractable and

soluble Pb and Cd fractions in soils. Agricultural Sciences, 1(3), 119-130.

Tam, N. F. Y. & Yao, M. M. (1999). Three digestion methods to determine concentrations of Cu, Zn, Cd, Ni, Pb, Cr, Mn, and Fe in mangrove

sediments from SaiKeng, ChekKeng and Sha Tau Kok, Hong Kong. Environmental Contamination and Toxicology, 62(6), 708-716.

Twyman, R. M. (2005). Sample Dissolution for Elemental Analysis: Wet Digestion. In: P. Worsfold, A. Townshend, & C. Poole (Eds.),

Encyclopedia of analytical science: the 2nd (pp.146-153), London: Elsevier Science

Wilson, B., Braithwaite, A., & Pyatt, F. B. (2005). An evaluation of procedures for the digestion of soils and vegetation from areas with

metalliferous pollution. Toxicological & Environmental Chemistry, 87(3), 335 – 344.




How to Cite

Abegunde, S. M. ., Oyebanji, A. O. ., & Osibanjo, O. . (2022). Evaluation of Digestion Procedures on Heavy Metals in Soil of a Dumpsite in Ibadan, South-western Nigeria. Suan Sunandha Science and Technology Journal, 5(2), 1–5. Retrieved from https://li02.tci-thaijo.org/index.php/ssstj/article/view/335



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