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年度	110	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	淡江大學	申請系所	水資源及環境工程學系
專案主持人	彭晴玉	職等/職稱	助理教授
專案中文名稱	複合型嵌入式/電容去離子系統應用於移除地下水之氨氮與硝酸氮
中文關鍵字	電容去離子, 嵌入式, 氨氮, 硝酸氮
專案英文名稱	Application of hybrid intercalation/ capacitive deionization system for ammonia-nitrogen and nitrate-nitrogen removal
英文關鍵字	capacitive deionization, intercalation, ammonia-nitrogen, nitrate-nitrogen
執行金額	870,000元
執行期間	2021/1/1 至 2021/12/31
計畫中文摘要	氨氮(NH4+-N)與硝酸氮(NO3--N)為地下水中常見之氮源污染物，本研究建構新穎的複合型鐵氰化銅(CuHCF)/活性碳(AC)嵌入式/電容去離子系統(Hybrid CuHCF/AC Intercalation/Capacitive Deionization System)應用於同時移除地下水之氨氮與硝酸氮。 鐵氰化銅(CuHCF) 平均粒徑為 40-70 nm立方顆粒，晶格面分別為(111)、(200)、(220)、(400)、(420)，具有典型普魯士藍之面心立方晶體結構；活性碳(AC) 顆粒之尺寸較不均勻(介於1-100 µm)，BET比表面積為756.68 m2/g，中孔與總孔洞體積比(Vmeso/Vtot)為64.40%，較高的中孔孔洞比例，能促進離子電吸附。 鐵氰化銅(CuHCF)之循環伏安圖(CV)，於三種不同電解質溶液中，氧化還原峰之電位由高至低依序為NH4+ > K+ > Na+，推論CuHCF在嵌入/遷出NH4+離子時，所需要的電位將高於嵌入/遷出K+和Na+離子；活性碳(AC) 之CV圖對稱性佳且接近矩形，是一理想電容材料，於掃描速率為1 mV/s時，比電容值為30.55 F/g。 複合型CuHCF/AC嵌入式/電容去離子系統，最佳操作電壓為1.6 V，最佳流速為 5.5 mL/min，當移除3.57 mM NH4NO3時，NH4+與NO3-的的平均電吸附量為6.13 mg NH4+/g CuHCF (438.27 µmole NH4+/g CuHCF) 與 19.05 mg NO3-/g AC (307.33 µmole NO3-/g AC)；陽離子競爭研究中發現，當NH4+、Na+、K+三種離子同時存在時，CuHCF對NH4+有最佳的選擇性，當K+存在時，則會有明顯與NH4+競爭嵌入CuHCF的現象；有機物質與微生物對複合型 CuHCF/ AC系統之影響顯著，未來實際應用時，宜先行移除有機物質與微生物；本研究顯示複合型CuHCF/AC系統可有效應用於同時移除NH4+與NO3-。
計畫英文摘要	Ammonia-nitrogen and nitrate-nitrogen are the commonly found nitrogen pollutants in groundwaters. This study is aimed to develop emerging technology of hybrid CuHCF/AC intercalation/capacitive deionization (CDI) system to simultaneously remove ammonia-nitrogen and nitrate-nitrogen in groundwaters. The cubic Copper Hexacyanoferrate (CuHCF) particles have average diameter of 40-70 nm with lattice planes of (111), (200), (220), (400), (420), which represented the typical Prussian Blue face-centered cubic structure. Activated carbons (ACs) have diverse particle size between 1-100 µm, which has BET specific surface area of 756.68 m2/g with ratio of mesopores to total pore volume of 64.40%. Higher ratio of mesopores volume can enhance the electrosorption of ions. The voltages of oxidation and reduction peaks of CuHCF in three different electrolytes decreased in the following order NH4+ > K+ > Na+ based on the Cyclic Voltammetry (CV) analyses, which indicated the needed voltage of intercalation/deintercalation of NH4+ is higher than that of K+ or Na+. The CV curves of AC are symmetric and closed to rectangle, which indicated an ideal capacitive material. The specific capacitance of AC was 30.55 F/g at the scan rate of 1 mV/s. The optimum applied voltage and flow rate was 1.6 V and 5.5 mL/min, repectively, for he hybrid CuHCF/AC intercalation/capacitive deionization system. When the hybrid CuHCF/AC system applied to remove 3.57 mM NH4NO3, the average electrosorption capacity of NH4+ and NO3- was 6.13 mg NH4+/g CuHCF (438.27 µmole NH4+/g CuHCF) and 19.05 mg NO3-/g AC (307.33 µmole NO3-/g AC), respectively. The study of cation competition found that when three cations (NH4+, Na+, K+) co-existed in the solution, the best selectivity of CuHCF was toward NH4+ and the competition of K+ with NH4+ was obvious. Organic matters and microorganisms had significant impact on the hybrid CuHCF/AC system. For future applications, removal of organic matters and microorganisms in advance is highly recommended. This study demonstrated that the hybrid CuHCF/AC intercalation/capacitive deionization (CDI) system can effectively remove NH4+ and NO3- simultaneously.