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  • Redox-independent chromium isotope fractionation induced by ligand-promoted dissolution.

Redox-independent chromium isotope fractionation induced by ligand-promoted dissolution.

Nature communications (2017-11-19)
Emily M Saad, Xiangli Wang, Noah J Planavsky, Christopher T Reinhard, Yuanzhi Tang
摘要

The chromium (Cr) isotope system has emerged as a potential proxy for tracing the Earth's atmospheric evolution based on a redox-dependent framework for Cr mobilization and isotope fractionation. Although studies have demonstrated that redox-independent pathways can also mobilize Cr, no quantitative constraints exist on the associated isotope fractionations. Here we survey the effects of common environmental ligands on the dissolution of Cr(III)-(oxy)hydroxide solids and associated Cr isotope fractionation. For a variety of organic acids and siderophores, δ

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肠菌素, from Escherichia coli, ≥98% (HPLC)