以模場規模之電動力法及植生技術復育現地鉛污染土壤之研究
| 中文摘要 | 重金屬污染直接威脅台灣農業土地的有效利用並長期受到重視，因此，重金屬污染農地快速有效的整治方式具有極高研究及應用價值，特別是模場現地污染整治的試驗更顯得重要。本計畫研究團隊因位於台中縣，擬針對台中縣重金屬污染農地作為模場試驗對象。台中縣污染場址多為農地且污染重金屬種類以鉛及鋅為主，本計畫即以模場規模現地鉛污染土壤為主要研究對象，此有利本研究執行的便利性、有效性及效益性。 本研究擬針對兩種現地型土壤復育技術進行模場試驗，其一為物化處理技術的電動力法(Electrokinetics, EK)，其諸多優點包括設備簡單、操作成本低及可適用多種污染物，甚至能適用於黏質土層，此外，並可結合其他整治技術如氧化法及生物分解法等，成為一複合且多功能的處理技術。 另一種現地型生物處理技術為植生復育，特別是本土性植物對於土壤中重金屬具有極高的吸收能力，本研究擬以模場規模之電動力法及植生技術復育台中縣現地鉛污染土壤，企盼藉由本計畫了解模場規模之電動力法及植生技術復育技術的關鍵因子，進而掌握兩技術最具去除效益的操作參數，最後獲得兩技術的成本效益。 對電動力法復育重金屬土壤而言，過去雖然已將污染場址的污染土壤送入實驗室進行電動力法試驗，處理後土壤符合監測基準，成本效益亦較許多處理方法低廉，但由於電動力法藉由直流電提供污染物驅動能力，當規模放大後許多操作參數的影響勢必不同，電動力法的研究目標為： 釐清供應電壓放大，去除效率是否等比例提昇。 瞭解高電壓處理下土壤溫度是否過高、電流負荷是否過大(甚至造成工安問題)。 控制其他電化學反應平衡動力，避免土壤情況劇變(pH的變化、電滲透水的流速控制等) 尋求適當的操作時間及估算模場規模的成本效益。 對植生技術復育重金屬土壤而言，本研究將以污染場址現地栽種試驗配合盆栽試驗，探討現地原生高累積植物以及文獻證實對鉛具有高累積性之植物，搭配螯合劑EDTA以及植物生長激素IAA，評估其對鉛污染農地之整治成效、最佳操作參數，並評估EDTA應用風險及減輕對策。其植生技術的研究目標為： 由鉛污染場址篩選本土對鉛具有高累積性之場址原生植物。 藉由現地及盆栽栽種試驗評估原生植物及向日葵、印度介菜及鬼針草等鉛高吸收性植物對台灣中部鉛污染場址之整治潛力。 評估螯合劑EDTA及植物生長激素IAA對促進鉛污染土壤植生復育之成效及最佳操作參數。 評估EDTA施用於植生復育之風險、減輕對策及可行性。 | ||
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| 中文關鍵字 | 電動力法、鉛污染、植生復育、土壤污染 | ||
基本資訊
| 專案計畫編號 | EPA-99-GA103-03-A236-12 | 經費年度 | 099 | 計畫經費 | 980 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 | 章日行 |
| 主辦單位 | 土污基管會 | 承辦人 | 尤衍翔 | 執行單位 | 朝陽科技大學 |
成果下載
| 類型 | 檔名 | 檔案大小 | 說明 |
|---|---|---|---|
| 期末報告 | 期末報告-Final定稿.pdf | 5MB |
The Study on Pilot-scale Remediation for Pb Contaminated Soils by Electrokinetics and Phytoremediati
| 英文摘要 | (二) 英文部分︰ The heavy-metal contaminated soils have threatened Taiwan agricultural development seriously and been paid attention for a long time. Hence, the fast and effective remediation techniques possess high value of research and application. Especially, the in-situ soil remediation in pilot scale become significantly important. Since our affiliation locates in Taichung County, we select a heavy-metal contaminated site in Taichung County as the target. Most contaminated sites in Taichung County are agricultural lands polluted by Pb and Zn. For the consideration of convenience, effectiveness, and economics, we selected a Pb contaminated site for this research. Two promising in-situ soil remediation techniques will be employed in this pilot teat. One is the physical-chemical remediation- electrokinetics. This technique has several advantages including simple equipment, low operational cost, and feasible to different contaminants. In addition, electrokinetics can be integrated with other remediation techniques such as oxidation and biodegradation into a complex and multi-function technique. The other technique is the phytoremediation. Some local plants have been proven to strongly absorb heavy metals in the soil. In this study, we try to use electrokinetics and phytoremediation to in-situ remediate the Pb contaminated soils in Taichung County. Hopefully, we can obtain critical operation parameters of these two remediation techniques by proceed this project and achieve satisfactory results. For the electrokinetics, we already have some valuable experiences. In our previous studies, the real heavy-metal contaminated soils were treated by electrokinetics and obtained successful results. However, many operation parameters will vary when the electrokinetics is applied to the real site, which will influence the removal efficiency and the processing cost. For this pilot experiments, our research goals include as the following: To clarify the Pb remoal efficiency whether consistent to the experimental results in lab during the pilot study. To understand the phenamena of high soil temperature and electricity loading during the pilot study. To learn how to control the pH and electro-osmotic flow in the electrokinetics system and how to control the other electrochemical reactions. To obtain the proper operation parameters and estimate the economic effectiveness for the pilot remediation. For the phytoremediaiton, we will apply planting and bonsai to remediate the contaminated soil in real site. We will employee the local and some plants that already have been proven with high Pb absorption capacity in this study. In addition, the chelating agent-EDTA and growth hormone-IAA will be integrated to find out the proper operation parameters and the remediation effectiveness. Our research goals include as the following: To find out the local plants with Pb absorption capacity. To estimate the application impact of some local plants, Helianthus, India mustard, and Spanish needles for Taiwan central Pb contaminated sites. To obtain the proper operation parameters of the chelating agent-EDTA and growth hormone-IAA. To understand the risk and feasibility of EDTA application to phytoremediation. | ||
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| 英文關鍵字 | Electrokinetics, Pb contamination, Phytoremediation, Soil Pollution | ||