Chemical speciation of lead adsorbed onto volcanic ashes by ICP-OES and XANES


  • Bolie Blixen Bang University of Yaounde I, Faculty of Sciences, Yaounde, Cameroon
  • Bridinette Thiodjio Sendja University of Yaounde I, National Advanced School of Engineering of Yaounde, Yaounde, Cameroon
  • Nahum Andrés Medellin-Castillo Universidad Autonoma de San Luis Potosi
  • René Loredo Portales CONACYT – National Autonomous University of Mexico, Geology Institute, Regional Northwest Station, Hermosillo, Sonora, Mexico
  • Gladis Judith Labrada Delgado Instituto Potosino de Investigacion Cientifica y Tecnologica, A.C., San Luis Potosi, S.L.P., Mexico
  • Candy Carranza Alvarez Autonomous University of San Luis Potosi -Unidad Académica Multidisciplinaria Zona Huasteca, Cd. Valles, S.L.P., Mexico
  • Ben Bolie Germain Hurbert University of Yaounde I, Faculty of Sciences, Yaounde, Cameroon
  • Roberto Leyva Ramos Autonomous University of San Luis Potosi, Faculty of Chemical Sciences, San Luis Potosi, S.L.P., Mexico
  • Simon Yobanny Reyes López Autonomous University of Ciudad Juarez, Juarez City, Chihuahua, Mexico



X-ray absorption spectroscopy, volcanic ashes, microprecipitation, ion exchange


This study focuses on the assessment of the VA materials from the Cameroon volcanic line (CVL) for their use as natural adsorbents to remove Pb(II) pollutant from aqueous solutions. The chemical speciation of lead adsorbed onto volcanic ashes based by means of inductively coupled plasma optical emission spectroscopy (ICP-OES) and X-ray absorption near edge spectroscopy (XANES) study is reported. The ashes from CVL are used to remove lead in aqueous solutions. The maximum value of the adsorption capacity of lead in volcanic ashes was 7.60 mg g-1 at pH 5. Regarding the adsorption process, the contribution of the mixture lead components after adsorption and a strong interaction of adsorbed lead with the surface of volcanic ashes were proven. The chemical elements present in the volcanic ash and their concentrations are determined by ICP-OES. Chemical speciation was carried out measuring Pb saturated volcanic ash sample at the L3 edge (13035 eV) at the XAFS beam line in Elettra Sincrotrone Trieste. The XANES measurements showed that the lead removal occurred mainly by microprecipitation of lead acetate and carbonate associated with a possible ion-exchange forming lead monoxide.

Author Biography

Nahum Andrés Medellin-Castillo, Universidad Autonoma de San Luis Potosi

Faculty of Engineering, San Luis Potosi, S.L.P., Mexico


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How to Cite

Blixen Bang B, Thiodjio Sendja B, Medellin-Castillo NA, Loredo Portales R, Labrada Delgado GJ, Carranza Alvarez C, Germain Hurbert BB, Leyva Ramos R, Reyes López SY. Chemical speciation of lead adsorbed onto volcanic ashes by ICP-OES and XANES. Supl. Rev. Mex. Fis. [Internet]. 2022 Feb. 18 [cited 2022 Jul. 2];3(1):010602 1-. Available from:



06 I National Congress of the Mexican Society of Synchrotron Light