Hussein Jaafar Kanbar, Zeinab Matar
This study focused on metal release from technosols induced by synthetic root exudate (SRE). The relationship between metal release and the composition of the SRE was studied using technosols. This was done by treating the technosols with SRE solutions having varying concentrations of low molecular weight organic acids (LMWOAs), namely oxalic, citric, and malic acids. Consequently, the physico-chemical parameters (pH and electric conductivity), Ca, Mg, Fe, Zn, and Cu release (by atomic absorption spectroscopy, AAS), spectral changes (by Fourier transform infrared, FT-IR), and organic parameters (by fluorescence) were investigated. Metal release showed to be dependent on the SRE composition and technosol characteristics. Citric acid selectively released Ca, Mg, Zn, and Cu from technosols in a concentration-dependent manner; oxalic acid showed a significant role in the release of Mg and Fe. Under relatively high LMWOA concentrations, particulate organo-mineral complexes precipitated. Additionally, technosol weathering was seen by the dissolution of humic substances and ferrihydroxophanes, which in turn caused metal release. However, re-precipitation of these phases showed to re-sorb metals, thus underestimating the role of LMWOAs in metal release. Therefore, the selective metal leaching was highly dependent on the SRE composition and LMW.
@article{16430342-d095-4e1a-a856-9b3117fd6cb2,
title={Selective metal leaching from technosols},
author={Hussein Jaafar Kanbar and Zeinab Matar},
year={2026},
language={en}
}TY - JOUR TI - Selective metal leaching from technosols AU - Hussein Jaafar Kanbar AU - Zeinab Matar PY - 2026 LA - en ER -
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