行政院國家科學委員會補助專題研究計畫成果報告:地化反應與地下水流自組反饋之研究﹝三﹞
Date Issued
2000
Date
2000
Author(s)
DOI
892313B002036
Abstract
A simplified simulation of copper precipitation during supergene enrichment processes was carried out to study the selforganization and feedback behaviors of geochemical reaction and groundwater flow. Reevaluation of the pattern of formation was studied by the HYDROGEOCHEM code wherein redox half reactions of covellite and chalcocite as reactants as well as precipitation reactions to form covellite and chalcocite were considered. The results indicate that precipitation pattern can be attributable to the redox-controlled process wherein the electron potential is the key parameter for forming such a pattern. The quantities of precipitation are also related to the time span and initial aqueous copper ion
concentration. This finding is in good agreement with field observation and gives a more physically-meaningful explanation to such phenomena compared to the non- selectively equilibrium and/or kinetic controlled approaches in literature.
Subjects
precipitation
reactive transport
redox half reactions
supergene enrichment
Publisher
臺北市：國立臺灣大學生物環境系統工程學系暨研究所
Type
report
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892313B002036.pdf
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Format
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(MD5):e848a8bb470356bb7b939642a5a71c91