Remediation of the alkalinity of steel mill powders by sequential washing with organic acids

Authors

  • Pedro Delvasto Department of Materials Science, Simon Bolivar University. Caracas, Venezuela
  • Xinyan Huang Department of Materials Science, Simon Bolivar University. Caracas, Venezuela
  • Daniela Sandoval Ravotti Department of Materials Science, Simon Bolivar University. Caracas, Venezuela
  • Julio Andrés Casal-Ramos Department of Materials Science, Simon Bolivar University. Caracas, Venezuela
  • José Ramón Domínguez Verenzuela Atomic Spectroscopy Laboratory, Universidad Simón Bolívar. Caracas. Venezuela

DOI:

https://doi.org/10.15381/iigeo.v14i27.688

Keywords:

Residual alkalinity remediation, residual dust of steel, sequential washed, organic acids

Abstract

Residual steelmaking powders, coming from a Venezuelan steel mill, were characterized physicochemically, detecting that they had high contents of heavy metals such as Fe, Zn and Pb and a high pH of contact, greater than 12 units, which makes it a waste dangerous due to its tendency to generate leachates with high alkalinity. Due to these results, a remediation process of the residue was proposed through sequential washes with dilute solutions of (CH2) 2COH (COOH) 3 (citric acid), (COOH) 2 (oxalic acid), CH3COOH (acetic acid) and H2SO4 ( sulfuric acid). It was obtained that the CH3COOH solution generated the greatest attenuation of the alkalinity of the powders, reaching acidity until a pH of around 4 units.

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Published

2011-07-15

Issue

Vol. 14 No. 27 (2011)

Section

Artículos científicos

License

Copyright (c) 2011 Pedro Delvasto, Xinyan Huang, Daniela Sandoval Ravotti, Julio Andrés Casal-Ramos, José Ramón Domínguez Verenzuela

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

AUTHORS RETAIN THEIR RIGHTS:

a. Authors retain their trade mark rights and patent, and also on any process or procedure described in the article.

b. Authors retain their right to share, copy, distribute, perform and publicly communicate their article (eg, to place their article in an institutional repository or publish it in a book), with an acknowledgment of its initial publication in the Rev. Inst. investig. Fac. minas metal cienc. geogr.

c. Authors retain theirs right to make a subsequent publication of their work, to use the article or any part thereof (eg a compilation of his papers, lecture notes, thesis, or a book), always indicating the source of publication (the originator of the work, journal, volume, number and date).

How to Cite

Delvasto, P., Huang, X., Sandoval Ravotti, D., Casal-Ramos, J. A., & Domínguez Verenzuela, J. R. (2011). Remediation of the alkalinity of steel mill powders by sequential washing with organic acids. Revista Del Instituto De investigación De La Facultad De Minas, Metalurgia Y Ciencias geográficas, 14(27). https://doi.org/10.15381/iigeo.v14i27.688