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嘉南平原曾文溪流域含水層與地下水間之水－岩反應系統

專案計畫編號	EPA-99-GA103-03-A236-15
經費年度	099
計畫經費	960 千元
專案開始日期	2010/12/29
專案結束日期	2011/12/28
專案主持人	呂學諭
主辦單位	土污基管會
承辦人	尤衍翔
執行單位	國立中正大學
專案分類	土壤及地下水
中文關鍵字	曾文溪流域;地下水污染;連續淋溶程序
英文關鍵字	Tsengwenshi Watershed;Groundwater Pollution;Sequential Extraction Procedure
協同主持人	李元希
共同主持人
計畫聯絡人	呂學諭
計畫聯絡電話	05-2720411#61201
計畫聯絡信箱	sheilu@ccu.edu.tw

中文摘要	台灣地區廣泛地運用地下水做為飲用水之水源，尤其彰化、雲林地區之比例最高，然而長久以來，台灣地區地下水中鐵（Fe）、錳（Mn）、砷（As）及許多重金屬離子之含量經常令人擔憂。然而，這些污染物亦已經證實為天然源透過地下水與土壤間的水－岩反應進入地下水體。過去已有許多關於土壤污染物釋出水體的研究，然而，仍存在一些問題尚待克服，本研究將針對來源較為單一的微量元素，嘗試利用天然示蹤劑的概念，透過土壤階段萃取樣本的分析結果，可建構土壤與地下水之間的水－岩反應系統，據此，可推估鐵、錳及其他金屬元素的釋出機制。再者，土壤化學性質主要受控於砂、泥比例，因此必須先降低或消除砂泥比例之效應，才能真實反應土壤是否含有相對較高的污染物濃度。由於地下水的流速緩慢，地下水質係代表水體入滲以後一段長時期地下水與整個含水層水－岩反應的總合結果，並非僅受採樣井土壤的影響，亦即在進行地下水質與土壤性質相關性研究時，必須考量地下水在整個流線上的可能反應。
中文關鍵字	曾文溪流域;地下水污染;連續淋溶程序

中文摘要

台灣地區廣泛地運用地下水做為飲用水之水源，尤其彰化、雲林地區之比例最高，然而長久以來，台灣地區地下水中鐵（Fe）、錳（Mn）、砷（As）及許多重金屬離子之含量經常令人擔憂。然而，這些污染物亦已經證實為天然源透過地下水與土壤間的水－岩反應進入地下水體。過去已有許多關於土壤污染物釋出水體的研究，然而，仍存在一些問題尚待克服，本研究將針對來源較為單一的微量元素，嘗試利用天然示蹤劑的概念，透過土壤階段萃取樣本的分析結果，可建構土壤與地下水之間的水－岩反應系統，據此，可推估鐵、錳及其他金屬元素的釋出機制。再者，土壤化學性質主要受控於砂、泥比例，因此必須先降低或消除砂泥比例之效應，才能真實反應土壤是否含有相對較高的污染物濃度。由於地下水的流速緩慢，地下水質係代表水體入滲以後一段長時期地下水與整個含水層水－岩反應的總合結果，並非僅受採樣井土壤的影響，亦即在進行地下水質與土壤性質相關性研究時，必須考量地下水在整個流線上的可能反應。

中文關鍵字

曾文溪流域;地下水污染;連續淋溶程序

類型	檔名	檔案大小	說明	最新版公開日期
期末報告	Final-s.pdf	9MB	期末報告公開版	2012/2/1 上午 12:00:00

摘要	Groundwater is one of the major sources for supplying daily usage water of residents, especially in Changhua and Yunlin areas. However, the contaminants, such as Fe, Mn and heavy metals, are still major issues in the coming years. These pollutants are generally recognized as being released by natural soils due to the water-rock interaction. Although there have been many studies addressing on the interaction between groundwater and host soil, some topics still need more effort to get a better approach. In this study, a concept of natural tracer will be utilized to establish the water chemical model. Some ultra-trace metal elements, such as rare earth elements, are very suitable to be the natural tracers. The bulk chemistry of soil is highly controlled by the ratio of sand to clay, which is equivalent to the ratio of quartz to clay mineral. Therefore, the relative concentrations of pollutants should be evaluated after the effect of sand-clay ratio is normalized. Moreover, the groundwater chemistry represents the result of long-term reaction with soils. The studied area should be extended to the upstream along the groundwater flow path.
英文關鍵字	Tsengwenshi Watershed;Groundwater Pollution;Sequential Extraction Procedure

摘要

Groundwater is one of the major sources for supplying daily usage water of residents, especially in Changhua and Yunlin areas. However, the contaminants, such as Fe, Mn and heavy metals, are still major issues in the coming years. These pollutants are generally recognized as being released by natural soils due to the water-rock interaction. Although there have been many studies addressing on the interaction between groundwater and host soil, some topics still need more effort to get a better approach. In this study, a concept of natural tracer will be utilized to establish the water chemical model. Some ultra-trace metal elements, such as rare earth elements, are very suitable to be the natural tracers. The bulk chemistry of soil is highly controlled by the ratio of sand to clay, which is equivalent to the ratio of quartz to clay mineral. Therefore, the relative concentrations of pollutants should be evaluated after the effect of sand-clay ratio is normalized. Moreover, the groundwater chemistry represents the result of long-term reaction with soils. The studied area should be extended to the upstream along the groundwater flow path.

英文關鍵字

Tsengwenshi Watershed;Groundwater Pollution;Sequential Extraction Procedure

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