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年度	109	專案性質	實驗性質
專案類別	研究專案	研究主題	調查
申請機構	國立中央大學	申請系所	環境工程研究所
專案主持人	秦靜如	職等/職稱	副教授
專案中文名稱	開發現場快篩水中鎘之分析電極
中文關鍵字	伏安法, 奈米碳管,
專案英文名稱	Development of electrode for in-situ analysis of cadmium
英文關鍵字	voltammetric, carbon nanotube
執行金額	1,270,000元
執行期間	2020/1/1 至 2020/12/31
計畫中文摘要	重金屬線上即時監測設備雖已發展有相當長的時間，但由於重金屬離子本身特性及偵測方法的問題而尚無快速且靈敏的檢測技術。相對於放流水等及他地表水，地下水重金屬濃度低，且調查場址除工廠等地區，更有許多是為野外與田間，調查場域寬廣，需要低分析極限但便於攜帶的現地快篩設備，以利於在現場能快速的污染流布有初步認知。本計畫最主要目的為以本研究群過去開發之伏安分析技術為基礎，開發水質快速分析技術，應用於現場水質分析，配合運用不同伏安法，降低偵測極限與提高選擇性與靈敏度。計畫中亦將對所開發電極進行表面物化以及電化學特性分析，以釐清電極表面反應原因以及干擾發生機制，做為修正電極表現性之依據。最後將針對地下水特性，分別以模擬水樣與真實地下水水樣，進行其它離子之干擾試驗，如其他重金屬以及酸根離子等，以降低分析極限。預期可有效做為水中鎘之快篩之工具，有效縮短樣品分析前處理及分析時間。 本研究完成氧化石墨烯/單壁奈米碳管/碲化鉍修飾玻璃碳電極(GO / SWCNT / Bi2Te3/GCE)的製備，選定方波陽極析出伏安法分析水中的鎘。所選用的製備方法簡單無須過多的化學藥劑，對環境有益。電極的電化學性質分析也顯示GO / SWCNT / Bi2Te3/GCE能有效的將各材料的特性發揮使反應電流有效增加。對於Cd(II)之檢測極限（LOD，S / N = 3）為0.99 μg/ L，定量極限（LOQ，S / N = 10）為3.30 μg/ L，低於放流水與自來水標準。在干擾分析部份，除銅離子外，Pb(II), Zn(II), Cr(III), Cr(VI), As(III) and As(V)濃度達Cd(II)的20倍時，仍可忽略其干擾，也因此在自來水與地下水的真實水樣分析中均顯示良好的回收率。最後，所製備的電極具有良好的再現性與重複性。
計畫英文摘要	e been developed for years. However, there are still no reliable instruments for rapid and accurate determination of heavy metal ions due to their complex speciation and reactions. Compared to surface waters, concentrations of heavy metal are very low in groundwater. Also, the contaminated sites may locate in rural areas, and the amount of samples is large. Therefore, technologies with rapid, low detection limits and simple usage are necessary for the in-situ determination of heavy metal ions in groundwaters. This work aims to enhance the performance of the existing voltammetry technique so that it can be used for the detection of cadmium in natural water. By modifying the SWCNT/GCE electrode developed from our previous works and by incorporating different voltammetric techniques. The surface physical and chemical as well as the electrochemical properties of the modified electrodes will be characterized. The synthetic and real groundwater samples will be used to study the interferences of other heavy metal ions and inorganic compounds on the detection of Cd. It is expected to lower the detection limit, improve the accuracy and selectivity. By now, GO / SWCNT / Bi2Te3/GCE has been successfully synthesized by a simple method, which also uses little chemicals and friendly to the environment. The electrochemical characterization also confirmed that such composite effectively incorporated the advantages of each material and enhanced the detection ability of Cd(II). The limit of detection is 0.99 μg/L, and the limit of quantification is 3.3 μg/L, which are lower than the drinking water standard and discharge standard. Interferences test was conducted by adding Pb(II), Cu(II), Zn(II), Cr(III), Cr(VI), As(III), and As(V) with concentration 20 times of Cd(II) concentration. It was found that, except Cu(II), other metal ions tested in this work had little or none interferences. Therefore, GO / SWCNT / Bi2Te3/GCE also showed good recovery in groundwater and tap water. The GO / SWCNT / Bi2Te3/GCE also has good reproducibility and good regeneration ability.