本研究以植生復育工法進行現地污染土壤整治，選用培地茅、水柳、馬拉巴栗及桃花心木進行重金屬(鉛、鉻、銅、鋅、鎳)污染復育評估探討。本研究現地土壤重金屬調查鉻污染最高濃度達137,235 mg/kg；鉛最高濃度110,210 mg/kg；銅最高濃度92,300 mg/kg；鋅最高濃度77,293 mg/kg；鎳最高濃度31,673 mg/kg。依污染濃度區分為高低濃度區，高濃度共劃分三區塊(H-I、H-II及H-III)，低濃度為一區塊(L)，依四區土壤重金屬有效性試驗結果顯示，以鉛生物有效性最高，高污染區濃度介於52.9-737 mg/kg，低污染區濃度10.6 mg/kg；其次為銅，高污染區有效性濃度於25.4-192 mg/kg之間，低污染區濃度7.97 mg/kg；鋅在高污染區有效性濃度於12.7-157 mg/kg，低污染區濃度4.95 mg/kg；鎳在高污染區有效性濃度0.81-6.06 mg/kg，低污染區有效性濃度0.76 mg/kg；鉻在高污染區有效性濃度0.10-13.1 mg/kg，低污染區有效性濃度0.10 mg/kg。由種植結果顯示培地茅植體地下部對重金屬鉻累積較佳；水柳以地上部對鋅累積效果較佳；馬拉巴栗地下部對鉛、鉻及銅的累積效果較佳；桃花心木以地下部對鉛的累積效果較明顯。轉移係數計算結果以培地茅對鉛具有較佳的萃取效果，而對鉻、鎳及銅則發揮植生穩定的效果；馬拉巴栗及水柳對鋅及鉛具萃取效果，針對其他重金屬則具植生穩定的效果；桃花心木對鎳及鉛的累積能力相當，而對鉻、銅及鋅明顯發揮植生穩定的效果。生物濃縮因子計算結果，於H-I、H-II及L試驗區內各植物之鉻BCF值皆為最高。其他重金屬仍具穩定吸收的效果。依照研究結果估算污染面積800平方公尺的表土層土壤以植生復育工法栽種1年最高可移除的總量為鋅的0.19 kg，鉛可達0.16 kg，銅為0.14 kg，鉻及鎳分別為0.13 kg及0.14 kg，植生復育工法所需的復育時間雖較長，但仍具低成本且非破壞性之優勢。本研究之成果將能做為未來綠色整治參考之依據。

In this study, the remediation of heavy metals (lead, chromium, copper, zinc and nickel) contaminated soils was carried out using phytoremediation. Phytocarpus, water willow, mara chinensis, and mahogany were selected as the plants for soil remediation. Results from the site investigation show that the maximum concentrations of chromium, lead, copper, zinc, and nickel were 137,235, 110,210, 92,300, 77,293, and 31,673 mg/kg. The high concentration area was divided into three groups((H-I、H-II及H-III). According to the test results of soil heavy metal bioavailability indicate that the phytocarpus had higher Cr accumulation in the lower part of the plant, and water willow had better Zn accumulation in the upper part of the plant. Mara chinensis had higher Cr, Pb, and Cu accumulation in the lower part of the plant, and mahogany also had better Pb accumulation in the lower part of the plant. Based on the bioconcentration factor results, phytocarpus had better Pb extraction efficiency, and it had stabilization effects on Cr, Ni, and Cu. Mara chinensis and water willow had higher extraction efficiency for Pb and Zn, and it had stabilization effects on other metals. Mahogany had hgiehr accumulation effects on Ni and Pb, and it had stabilization effects on Cr, Cu, and Zn. Results from this study will be useful in designing a phytoremediation system for the remediation of heavy-metal contaminated soils. The results of this study will be the basis for green remediation.

論文審定書 i
摘要 ii
Abstract iii
目錄 iv
圖目錄 vi
表目錄 vii
第一章 前言 1
1.1研究緣起 1
1.2研究目的 1
第二章 文獻回顧 2
2.1土壤重金屬污染之來源與現況 2
2.2土壤重金屬污染特性及危害 7
2.3影響土壤重金屬移動之因素 11
2.3.1土壤之酸鹼值 12
2.3.2土壤有機質 14
2.3.3土壤質地 15
2.3.4陽離子交換容量 16
2.3.5氧化還原電位 16
2.3.6其他因子 17
2.4 土壤及地下水重金屬整治之技術 17
2.5 土壤植生復育技術 19
2.5.1植生復育之機制 20
2.5.2植物吸收累積重金屬之機制 23
2.5.3植體累積重金屬能力評估 25
2.5.4植生復育技術之優缺點 25
2.6植物吸附重金屬之生物有效性 29
2.7不同植物對重金屬之累積性 31
第三章 材料與方法 35
3.1 研究場址概述 36
3.2調查及採樣方法 37
3.3 土壤基本性質分析 39
3.4 土壤重金屬分析 43
3.5生物有效性分析 44
3.6 植體重金屬分析 44
第四章 結果與討論 45
4.1土壤基本性質 45
4.2土壤重金屬分布 47
4.3土壤生物有效性 61
4.4植生復育試驗 62
4.4.1生育調查及生理試驗 62
4.4.2植體累積重金屬濃度分析 66
4.4.3不同植體累積重金屬試驗轉移係數(TF) 84
4.4.4不同植體累積重金屬試驗生物濃縮因子(BCF) 86
4.4.5植體對重金屬的移除量 93
第五章 結論與建議 97
5.1結論 97
5.2建議 98
參考文獻 99

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