劉振宇2006-07-252018-06-292006-07-252018-06-292000http://ntur.lib.ntu.edu.tw//handle/246246/10689本研究乃利用一簡化之模式模擬鋼礦富集過程中之況澱現象以探討地化反應與地下水流自組反讀之行為，研究中同時考量鋼礦物生成及轉變之氣化還原半反應與水流之關係並藉由HYDROGEOCB 五M 棋式分析模擬，結果顯示氣化還原電位為鋼況澱形成劍面之主要控制因子，況澱之生成量並與時間及初始濃度有關，此發現符合現場調直結果；相較於其他非選擇性之平衡或動力棋式，運用此模式更具物理意義來解釋此一現象。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.application/pdf1179193 bytesapplication/pdfzh-TW國立臺灣大學生物環境系統工程學系暨研究所況澱反應傳輸氣化還原半反應鋼礦富集precipitationreactive transportredox half reactionssupergene enrichmentreporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/10689/1/892313B002036.pdf