劉聰桂2006-07-252018-06-282006-07-252018-06-282000http://ntur.lib.ntu.edu.tw//handle/246246/11744台灣西南海岸平原地區文獻記載地下 水中含高濃度砷和腐植物質，本研究以新塭 及港尾兩地岩心，分析沈積物萃取液金屬離 子、總有機碳及孔隙水中所含各種離子與螢 光強度，探討嘉南地區地下水中高砷與高腐 植物質的可能來源。結果顯示沈積物中總有 機碳、鐵、錳和砷的關係為顯著正相關，顯 示總有機碳、鐵、錳、砷在沈積物中的富集 機制可能相同。宅港、義竹、港尾沈積物砷 的最高值都出現在全新世海侵形成的潟湖 相沈積物中。沈積物中豐富的有機質會消耗 環境中的氧氣而導致厭氧環境（還原環境） 的形成。在厭氧環境下，鐵的氧化物或氫氧 化物還原及有機物分解成水溶性腐植物 質，並釋放出所含的砷，造成高砷、高腐植物質的地下水。The southwestern coastal plain area of Taiwan was well known for its high concentrations of arsenic and humic substances in deep groundwater. In order to explain the origin of arsenic and humic substances, cations and total organic carbon (TOC) of sediments, and cations, anions and fluorescence intensity of porewater of sediments cores from Sin-wen and Kang-wei were analyzed. The good correlation among TOC , As, Fe and Mn contents of sediments suggests that they may have the same enrichment mechanism. Sediments with the highest arsenic concentration from Kang-wei, occur at the horizon deposited in the marine (lagoon) environment during the Holocene transgression. It is proposed that the strongly anoxic environment shown by the deeper part of the sediment column underneath the coastal area of southwestern Taiwan was induced by oxygen-consuming organic matters. The high concentrations of groundwater might be attributed to the reduction of iron oxides and the mineralization of organic matters.application/pdf25218 bytesapplication/pdfzh-TW國立臺灣大學地質科學系暨研究所孔隙水砷螢光強度porewaterarsenicfluorsense intensity[SDGs]SDG14reporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/11744/1/892116M002010.pdf