Impact of sewage sludge spreading on heavy metal speciation in tropical soils (Réunion, Indian Ocean)

Chemosphere
Emmanuel DoelschVirginie Van de Kerchove

Abstract

This study was designed to evaluate the impact of sewage sludge spreading on tropical soilborne heavy metal speciation. Sludgeborne heavy metal speciation was also assessed, and the potential mobility of the elements was classified as follows: Zn>Ni>Cu approximately Cr. Two sequential extraction procedures were applied to study Cr, Cu, Ni and Zn speciation in control soils and sludge-amended soils. We demonstrated that sewage sludge spreading over a 2-year period did not have an impact on soilborne heavy metal concentrations but affected speciation of the most mobile fractions of Ni and Zn. Both protocols were consistent for the organic matter fractions, with an increase in Cu, Zn and Cr concentrations in the amended soil as compared to the control soil. In addition, we highlighted that the two protocols characterized different pools of organic matter and that organic compounds remained in the solid matrix after extraction. With respect to the reducible fraction, completely opposite results were obtained with the two protocols and the solid residue study revealed that the two schemes were ineffective in characterizing iron and manganese fractions.

Citations

Apr 24, 2010·International Journal of Analytical Chemistry·Amanda Jo Zimmerman, David C Weindorf
Aug 11, 2015·The Science of the Total Environment·Thiago Augusto FormentiniEmmanuel Doelsch
Oct 2, 2007·Chemosphere·José Antonio RodríguezManuel López-Arias
Mar 14, 2007·Journal of Hazardous Materials·Quan-Ying CaiAthanasios Katsoyiannis
May 19, 2018·International Journal of Phytoremediation·Maozi LinDongliang Cheng
Jul 8, 2010·Journal of the Science of Food and Agriculture·Ana de Santiago, Antonio Delgado
Dec 19, 2007·The Analyst·Jeffrey R Bacon, Christine M Davidson
Mar 31, 2018·International Journal of Environmental Research and Public Health·Kai YangJinjuan Song
Aug 22, 2017·Environmental Science & Technology·Samuel LegrosEmmanuel Doelsch
Jan 30, 2007·Environmental Science & Technology·Emmanuel DoelschJean-Yves Bottero

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