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年度	106	專案性質	實驗性質
專案類別	研究專案	研究主題	整治
申請機構	朝陽科技大學	申請系所	環境工程與管理系
專案主持人	章日行	職等/職稱	教授
專案中文名稱	應用粒徑篩選及植生復育整治重金屬鉛銅污染土壤
中文關鍵字	粒徑篩選, 植生復育, 重金屬, 鉛污染土壤, 銅污染土壤
專案英文名稱	Integration particle-size screening and phytoremediation to remove lead and copper in soils
英文關鍵字	particle-size screening, phytoremediation, heavy metals, Pb contaminated soil, Cu contaminated soil
執行金額	850,000元
執行期間	2017/1/9 至 2017/11/30
計畫中文摘要	本計畫擬整合粒徑篩選及植生復育技術整治重金屬鉛銅污染土壤，以乾式篩選及濕式篩選進行土壤顆粒分離，並分析不同粒徑中土壤重金屬的濃度及重金屬型態分佈，此方式不僅不會造成土壤性質的改變，是一種務實簡單的操作方法，更是值得現地推廣的應用技術，能進而達到有效整治的目標。本研究以實場鉛、銅污染農地的現地土壤進行乾式與濕式篩選試驗，並透過玉米植生復育的盆栽栽種驗證及復育，進而探討兩者模式下的整治效果。本計畫實驗按照計畫書執行內容進行，研究結果可以歸納如下： 污染土壤鉛金屬於植生復育八週整治後，以根部吸收最為顯著，最高平均可吸收濃度約為774 mg kg-1，其次為葉子吸收濃度為124 mg kg-1，最低為莖部76 mg kg-1。 鉛污染土壤經植生復育後重金屬鍵結型態以鐵錳氧化態含量最多，依序為碳酸鹽態、有機物態、可交換態及殘餘態，與未處理前之鍵結型態沒有顯著差異。 乾式粒徑篩選可獲得鉛污染土壤不同粒徑土壤之比例、重金屬濃度及重金屬鍵結型態，同時將大顆粒(2.83 mm以上)土壤移除及填入乾淨砂土混合稀釋後，能快速使鉛污染濃度降至管制標準的要求。 鉛污染土壤透過乾式篩選及砂石混合稀釋後，不僅降低其污染濃度，亦能進行後續植生復育整治，其作物生長不受影響，且1噸砂石所需成本僅為乾淨土壤約1/10，顯示此方法對鉛污染土壤處理的可行性及實用性。 濕式篩選方法能有效分離不同粒徑之銅污染土壤，其粒徑越小濃度越高，將高濃度小顆粒(砏粒及粘粒)土壤移除後填入少數乾淨土壤混合稀釋，能有效降低其污染濃度。 透過將銅污染土壤小顆粒移除的方式，可大幅減少傳統客排土法所需要的土方量，亦能大幅降低鉛污染濃度，解決未來土壤供應不求的問題，故銅污染土壤以濕篩粒徑篩選搭配植生復育進行整治應為適當之方法。 本研究透過乾式及濕式粒徑篩選的方式分選其不同粒徑，具工法簡單、操作容易，再透過植生復育的驗證及復育下，可快速降低污染濃度及節省操作成本，提供未來不同污染物選擇整治技術的重要參考。
計畫英文摘要	This study is to integrate the particle-size screening and phytoremediation to remove lead and copper in soils. The soil particle separation was carried out by dry screening and wet screening, and the concentration and distribution of heavy metals in different particle diameters was analyzed. In this study, dry and wet screening experiments were carried out in the field soils of lead and copper con-taminated farmland. The remediation effect of the two models was explored and verified by phytoremediation experiment. Several conclusions and suggestions can be drawn: The average absorbable concentration of the root about 774 mg kg-1, leaf was about 124 mg kg-1 and the lowest was stem after eight weeks cultivate. The state of heavy metal bonding in lead-contaminated soil was the highest in iron-manganese oxidation state, followed by carbonate state, organic state, exchangeable state and residual state. Dry-type particle size screening could obtain lead-contaminated soil with different particle size of soil, concentration and bonding type of heavy metal. While large particles (up 2.83 mm) soil remove and filling dry sand mixed dilution, could quickly reduce the lead concentration to reach the require-ments of regulatory standards. Lead contaminated soil through dry screening and dry sand mixed dilute not only reduce its pollution concentration, but also to follow-up reforestation remediation. The cost of one ton dry sand about 1/10% to the clean soil, showing the feasibility and practicability of this method for lead contami-nated soil treatment. Wet screening method could effectively separate the different size of copper contaminated soil, the smaller particle with high concentration. The smaller particles soil removed and filling a few clean soils mixed dilute could effec-tively reduce pollution concentration. Through the removal of smaller particles of copper pollution could signifi-cantly reduce the amount of earthwork required by traditional passenger, but also reduce the concentration of pollution and to agree the regulatory stand-ards. This study is simple and easy to operate by dry and wet particle size screen-ing. It can quickly reduce the pollution concentration and save the operation cost and through the verification and rehabilitation of the plant regeneration.