彰化縣農地污染控制場址現地植生復育重金屬污染土壤之可行性評估計畫
| 中文摘要 | 植生復育試驗區位於彰化和美鎮大嘉段，總面積約1.3公頃，重金屬空間分佈調查之結果顯示，試驗區東側土壤之重金屬濃度較高，部份區域之As、Cr、Ni與Zn全量濃度超過食用作物農地土壤污染管制標準或土壤污染管制標準。以33種植物共8小區之小面積植物進行花卉植物篩選試驗，並依據植物生長狀態與累積重金屬濃度兩項篩選原則，所篩選適合於彰化試驗區大面積種植之植物包含仙丹花、美女櫻、五彩石竹、麒麟花、長壽花、鵝掌藤、馬齒莧、變葉木、六月雪、美人蕉、孔雀草及向日葵。以這12種植物進行兩次大面積種植之結果顯示，種植1個月後，12種植物累積之重金屬濃度、總移除量與生物量皆高於種植前之植物體，大部份植物根部累積之Cu、Cr及Ni濃度高於地上部，延長種植時間至2個月會增加植物體之重金屬濃度，氣溫之高低亦會影響植物累積重金屬之表現。添加螯合劑雖可增加土壤之有效性重金屬濃度、植物之累積濃度與總移除量，但卻未有一致之趨勢，原因應與所添加螯合劑之濃度較低有關。本計畫結果顯示，於污染區種植花卉植物可以達到土地再利用與移除重金屬之目的，並改善土壤生態系之功能，若以播種之方式種植，並將所種植花卉之物之幼苗或花朵至市場販售，此技術不僅可增加農民之收入，並可促進污染區農地再利用及農企業轉型及節省水資源等多種效益。 | ||
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| 中文關鍵字 | 植生復育，重金屬，花卉植物，螯合劑 | ||
基本資訊
| 專案計畫編號 | EPA-94-GA12-03-A21 | 經費年度 | 094 | 計畫經費 | 4200 千元 |
|---|---|---|---|---|---|
| 專案開始日期 | 2005/06/14 | 專案結束日期 | 2006/06/13 | 專案主持人 | 台大農化系陳尊賢 |
| 主辦單位 | 土污基管會 | 承辦人 | 執行單位 | 台大農化系陳尊賢 |
成果下載
| 類型 | 檔名 | 檔案大小 | 說明 |
|---|---|---|---|
| 期末報告 | 期末報告定稿本EPA-94-GA12-03-A212.pdf | 10MB | [期末報告]公開完整版 |
Assessment on the feasibility of in-situ phytoremediation of metals-contaminated cropped lands in Chunghua county
| 英文摘要 | A heavy metals-contaminated site in the central Taiwan of 1.3 hectare was used to study the feasibility of phytoremediation. Because irrigation canal was located in the eastern part, it thus has higher concentration of As, Cr, Ni and Zn in relative to others. Some of them were beyond the control standards of SGPR Act. After planting 33 species of various yard plants in the 8 blocks with two replicates for one month. The suitable 12 plants for two times-large area study included Chinenesis Ixora, Verbena bipinnatifida, Rainbow pink, Bojers Spurge, Kalanchoe, Scandent Scheffera umbrella tree, Purslane, Croton, Japanese Serissa, Cannaceae, French marigold, and Sunflower. These 12 plants have higher concentration and total removal of Cu, Cr, Ni, and Zn in the shoot after large area-planting in this contaminated site for 1 month in relative to the initial plants. For most of the plants, roots have higher concentrations in relative to shoots. The accumulated Cu, Cr, and Ni concentration in the shoots of these 12 plants also increased after extending the growing period from 1 month to 2 months. The decrease of temperature has negative effect on the accumulation of metals by these plants. Because of the low applying rate of EDTA and DTPA (3 mmol kg-1 soil), there was no identical effect on applying chelating agents on increasing the concentration and total removal of metals in the shoots of these 12 plants. Experimental results of this study show that phytoremediation, planting yard plants in the metals-contaminated site, was efficient to reduce the metal concentration in the contaminated site. The period for these 12 plants to decrease the current metal concentration in soil to the monitoring standards of cropped lands of SGPR Act is about 3~20 years. Farmers could earn more incomes by planting the seeds of these plants in the contaminated site and then sell their seedlings or flowers in the market. This phytoremediation technique also can promote the land reuse for upland crops or transfer the contaminated soils into another agricultural enterprise management system. The other benefit of this land use is for saving the water resources after cultivating with cutting flower in the contaminated region. | ||
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| 英文關鍵字 | phytoremediation, heavy metal, yard flowers, chelating agent | ||