Isotope Doping and Reaction Kinetics

In the past 10 years, we have been using the isotope doping method from the field of chemistry and biology together with newly available non-traditional stable isotopes to advance the near-equilibrium reaction kinetics.

(^Uundergraduate, ^Ggraduate, ^PDpostdoc authors supervised by Zhu; ^*corresponding author)

• Schott J, Saldi GD, Zhu C, Gong L and Chen KY (2024) Albite dissolution and precipitation kinetics as a function of departure from equilibrium in ²⁹Si spiked aqueous solutions at 150 and 180° C: Direct evidence for the decrease of the forward dissolution rate and the reactive surface area with the reaction progress. Geochimica et Cosmochimica Acta. DOI.
• Chen MK, Gong L, Jacques Schott, Lu P, Song YC, Chen KY, Yuan HL, Sun J, Apps J and Zhu C. Coupled feldspar dissolution and secondary mineral precipitation in batch systems: 6. labradorite dissolution and calcite and clay precipitation. Submitted to Geochimica et Cosmochimica Acta. June 20, 2024.
• ^GChen MK, Lu P, Song YC and Zhu C (2023) Geochemical modeling to aid experimental design for multiple isotope tracer studies of coupled dissolution and precipitation reaction kinetics, Acta Geochimica, accepted October 27, 2023.
• ^GKang JT, Bracco JN, Rimstidt JR, Zhu GH, Huang F and ^*Zhu C (2022). Ba attachment and detachment fluxes to and from barite surfaces in ¹³⁷Ba-enriched solutions with variable [Ba²⁺]/[SO₄^2-] ratios near solubility equilibrium. Geochimica et Cosmochimica Acta. v317,180-200. DOI.
• ^*Zhu C, ^GZhang  YL, Rimstidt JD, Gong L, ^UBurkhart, JA, Chen KY and Yuan HL (2021) Testing hypotheses of albite dissolution mechanisms at near-equilibrium using Si isotope tracers. Geochimica et Cosmochimica Acta. v303, 15-37. DOI.
• ^*Zhu C,  Rimstidt JD, ^GZhangYL, ^GKangJT, Schott J and Yuan HL (2020) Decoupling feldspar dissolution and precipitation rates at near-equilibrium with Si isotope tracers: Implications for modeling silicate weathering. Geochimica et Cosmochimica Acta. v271, 132-153. DOI.
• Gong L, Rimstidt JD^†, ^GZhang YL, Chen KY and *Zhu C (2019) Unidirectional kaolinite dissolution rates at near-equilibrium and near-neutral pH conditions. Applied Clay Science v182. DOI.
• ^GZhang YL, Gong L, Chen KY, ^UBurkhart J, Yuan HL and ^*Zhu C (2020) A method for Si isotope tracer kinetics experiments: Using Q-ICP-MS to obtain ²⁹Si/²⁸Si ratios in aqueous solutions. Chemical Geology v531. DOI;
• ^*Zhu C, ^PDLiu ZY, ^PDWang C, ^USchaefer A, ^GLu P, ^GZhang GR, ^GZhang YL, Georg RB, Rimstidt JD and Yuan HL (2016) Measuring silicate mineral dissolution rates using Si isotope doping. Chemical Geology, 445: 146-163. DOI
• ^PDLiu ZY, ^GZhang YL, Yuan HL, Rimstidt JD and ^*Zhu C (2016) A stable isotope doping method to test the range of applicability of detailed balance. Geochemical Perspective Letters 2(1): 78-86. DOI
• Gruber C, Zhu C, Georg, RB, Zakon J and Ganor J (2014) Resolving the gap between laboratory and field rates of feldspar weathering. Geochimica et Cosmochimica Acta 147: 90–106. DOI.
• Gruber C, Harpaz L, Zhu C, Bullen TD and Ganor J (2013) A new approach for measuring dissolution rates of silicate minerals by using silicon isotope. Geochimica et Cosmochimica Acta 104: 261-280. DOI.