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- W2108659478 abstract "In light of recent work on the reactivity of specific sites on large (hydr)oxo-molecules and the evolution of surface topography during dissolution, we examined the ability to extract molecular-scale reaction pathways from macroscopic dissolution and surface charge measurements of powdered minerals using an approach that involved regression of multiple datasets and statistical graphical analysis of model fits. The test case (far-from-equilibrium quartz dissolution from 25 to 300 °C, pH 1–12, in solutions with [Na+] ⩽ 0.5 M) avoids the objections to this goal raised in these recent studies. The strategy was used to assess several mechanistic rate laws, and was more powerful in distinguishing between models than the statistical approaches employed previously. The best-fit model included three mechanisms—two involving hydrolysis of Si centers by H2O next to neutral (>Si–OH0) and deprotonated (>Si–O−) silanol groups, and one involving hydrolysis of Si centers by OH−. The model rate law isdSidt(mol/m2s)=e-8.9±0.8Te-67.5±2.7kJ/molRT(θ>SiOH)+e3.6±0.7Te-82.8±2.1kJ/molRTθ>SiO-+e6.7±1.8Te-77.5±6.0kJ/molRTaOH-(±0.7logunits),where θ>SiOH and θ>SiO- are the fraction of surface silanol groups in the neutral and deprotonated forms, and aOH- is the bulk activity of OH−. The fitted ΔH‡ value (67.5 kJ/mol) for the dominant low pH mechanism indicates that the model lacks a fourth mechanism involving protonation of bridging oxygens on siloxane (>Si–O–Si<) groups, which cannot be included because the acidity of bridging oxygens is unknown. Further progress on this and other, more complex systems requires development of more predictive and realistic models of surface speciation." @default.
- W2108659478 created "2016-06-24" @default.
- W2108659478 creator A5007078614 @default.
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- W2108659478 creator A5056521299 @default.
- W2108659478 date "2008-09-01" @default.
- W2108659478 modified "2023-10-03" @default.
- W2108659478 title "Reaction pathways for quartz dissolution determined by statistical and graphical analysis of macroscopic experimental data" @default.
- W2108659478 cites W1621801135 @default.
- W2108659478 cites W1910539261 @default.
- W2108659478 cites W1964970003 @default.
- W2108659478 cites W1966491537 @default.
- W2108659478 cites W1978486469 @default.
- W2108659478 cites W1980728284 @default.
- W2108659478 cites W1983780679 @default.
- W2108659478 cites W1986082905 @default.
- W2108659478 cites W1986173741 @default.
- W2108659478 cites W1992575705 @default.
- W2108659478 cites W1995607517 @default.
- W2108659478 cites W2001627139 @default.
- W2108659478 cites W2003609307 @default.
- W2108659478 cites W2006100329 @default.
- W2108659478 cites W2007593832 @default.
- W2108659478 cites W2008838573 @default.
- W2108659478 cites W2009043709 @default.
- W2108659478 cites W2011965212 @default.
- W2108659478 cites W2012257865 @default.
- W2108659478 cites W2016277525 @default.
- W2108659478 cites W2018283520 @default.
- W2108659478 cites W2019937345 @default.
- W2108659478 cites W2020426826 @default.
- W2108659478 cites W2020757056 @default.
- W2108659478 cites W2022321851 @default.
- W2108659478 cites W2026709093 @default.
- W2108659478 cites W2027692529 @default.
- W2108659478 cites W2028498253 @default.
- W2108659478 cites W2030070423 @default.
- W2108659478 cites W2033230271 @default.
- W2108659478 cites W2034611223 @default.
- W2108659478 cites W2035877055 @default.
- W2108659478 cites W2037535080 @default.
- W2108659478 cites W2041848764 @default.
- W2108659478 cites W2043931953 @default.
- W2108659478 cites W2044099476 @default.
- W2108659478 cites W2046491676 @default.
- W2108659478 cites W2048486566 @default.
- W2108659478 cites W2048695875 @default.
- W2108659478 cites W2051371902 @default.
- W2108659478 cites W2052072594 @default.
- W2108659478 cites W2056900070 @default.
- W2108659478 cites W2057980421 @default.
- W2108659478 cites W2062495931 @default.
- W2108659478 cites W2063936779 @default.
- W2108659478 cites W2064188478 @default.
- W2108659478 cites W2064459234 @default.
- W2108659478 cites W2064999318 @default.
- W2108659478 cites W2066153025 @default.
- W2108659478 cites W2067608390 @default.
- W2108659478 cites W2069773493 @default.
- W2108659478 cites W2070414498 @default.
- W2108659478 cites W2072475832 @default.
- W2108659478 cites W2073827945 @default.
- W2108659478 cites W2075484023 @default.
- W2108659478 cites W2077664513 @default.
- W2108659478 cites W2080013681 @default.
- W2108659478 cites W2080269146 @default.
- W2108659478 cites W2081301829 @default.
- W2108659478 cites W2081436038 @default.
- W2108659478 cites W2085804797 @default.
- W2108659478 cites W2087707319 @default.
- W2108659478 cites W2089366753 @default.
- W2108659478 cites W2090039092 @default.
- W2108659478 cites W2091651204 @default.
- W2108659478 cites W2092210999 @default.
- W2108659478 cites W2093377627 @default.
- W2108659478 cites W2107082299 @default.
- W2108659478 cites W2124090533 @default.
- W2108659478 cites W2125304918 @default.
- W2108659478 cites W2128593685 @default.
- W2108659478 cites W2131794083 @default.
- W2108659478 cites W2132760935 @default.
- W2108659478 cites W2133266834 @default.
- W2108659478 cites W2149034123 @default.
- W2108659478 cites W2151422015 @default.
- W2108659478 cites W2166768560 @default.
- W2108659478 cites W2169451222 @default.
- W2108659478 cites W2320461396 @default.
- W2108659478 cites W2323493158 @default.
- W2108659478 cites W2331820982 @default.
- W2108659478 cites W2332356198 @default.
- W2108659478 cites W2418771097 @default.
- W2108659478 cites W2900157302 @default.
- W2108659478 cites W3036152800 @default.
- W2108659478 doi "https://doi.org/10.1016/j.gca.2008.07.002" @default.
- W2108659478 hasPublicationYear "2008" @default.
- W2108659478 type Work @default.