| 摘要註: |
台灣地區近年來因為工商業及科技業發達,其相關產業產生之廢棄物或廢水,造成土壤不同程度的重金屬汙染,使土壤汙染狀況嚴重。依土壤及地下水汙染管理基金會於2015年調查統計場址資料顯示目前共計有4,138筆農地、140筆工廠、22筆非法棄置場址與8筆其他因重金屬汙染達到管制標準而被公告為汙染控制場址。依國內重金屬汙染概況分佈顯示,農地重金屬汙染場址為最大宗,並且以重金屬為主要汙染物。針對此些汙染場址大部分均為農地,以土壤肥沃力、環境永續經營為目的下使用綠色整治技術中之植生復育法,並以添加可生物分解螯合劑EDDS與植物生長激素GA3去做總體植生復育整治效率探討。從本研究盆栽實驗結果顯示環境永續型植生復育整治重金屬銅、鋅與鎳土壤下可達到最大的效益並且最好的最佳操作因子組合為添加可生物分解螯合劑EDDS加上植物生長激素GA3,而重金屬鉛則較不適用於添加可生物分解螯合劑EDDS環境下,另外在經PCR及DGGE技術分析所得之菌相變化結果顯示,重金屬+EDDS+GA3組別有最豐富之菌相,說明當添加EDDS與GA3時,可刺激微生物生長,具有豐富菌相。 The advancement of heavy industry, commerce, technology industry and other related industries in Taiwan over the years has caused the problem of wastewater leading to varied degrees of heavy metal pollution contaminating the soil. According to the Soil and Groundwater Pollution Remediation Fund Management Board's investigation and statistics in 2015, a total of 4,138 lots of farmland, 140 factories, 22 illegal dumping sites, and 8 other sites were announced as pollution control sites exceeding the heavy metal pollution control standards. In domestic heavy metal pollution distribution status, farmland takes up the largest proportion, with heavy metal as the main pollutant. In consideration of the fact that most polluted sites are farmland, this study adopts phytoremediation, a green remediation technology, for the sake of restoring soil fertility and ensuring environmental sustainability, and adds Ethylenediaminedisuccinic acid (EDDS) and the plant growth regulator (GA3) to examine the overall efficiency of phytoremediation. The pot experiment of this study finds that environmentally sustainable phytoremediation achieves the greatest efficacy regarding the remediation of soil polluted by copper, zinc and nickel. The best combination of operational factors is the addition of the EDDS and GA3. The environment where the Ethylenediaminedisuccinic acid (EDDS) is added shows a poorer performance in the remediation of the heavy metal lead. In addition, the PCR-DGGE analysis results of bacterial flora change show that the combination "heavy metal+EDDS+GA3" brings about the richest bacterial flora, indicating that the addition of EDDS and GA3 can stimulate microbial growth, thereby achieving richer bacterial flora. |