کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
5779256 1634387 2017 5 صفحه PDF سفارش دهید دانلود کنید
عنوان انگلیسی مقاله ISI
What is the Real ΔGr Function of Albite Dissolution?
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علم هواشناسی
پیش نمایش صفحه اول مقاله
What is the Real ΔGr Function of Albite Dissolution?
چکیده انگلیسی

One of the most significant environmental variables that affect albite dissolution rate is deviation from equilibrium (ΔGr). Most of the studies that describe the effect of ΔGr on albite dissolution rate were conducted under alkline pH (8.8-9.2), elvetad temperatures (80-300 °C) and for Amelia Courthouse (USA) albite. Comparison of the f(ΔGr) derived from those studies to the only f(ΔGr) from low temperature (25 °C), circum neutral pH and EVJE (Norway) albite leads to different ΔGr functions. Yet, except for the study of1, rate laws for silicate minerals dissolution, which are based on experiments conducted under ambient conditions, are lacking. Here we present new experimental results of single point batch experiments (SPBE) of albite dissolution in a isotopically spiked solution. The novel method that use Si isotopes2 enables detecting rates that otherwise can't be detected under ambient conditions. Albite dissolution rates were determined under neutral-acidic pH, temperatures of 3.6, 25 and 50 °C, and a wide range of undersaturation conditions. The dependency of the dissolution rate on deviation from equilibrium (f(ΔGr)) was in agreement with the prediction of previous studies. However, the value of ΔGcrit was found to be significantly different, suggesting an effect of extrinsic properties of the environment.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Procedia Earth and Planetary Science - Volume 17, 2017, Pages 148-152
نویسندگان
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