本研究的目的在於利用自行合成之奈米級零價鐵還原去除水中之硝酸鹽，並在不同起始pH值下，探討溶液中含有Fe2+與Cu2+時對於零價鐵還原去除硝酸鹽之影響。控制起始pH值，並添加Fe2+與Cu2+於零價鐵去除硝酸鹽的溶液中時，發現在起始pH值為2的情況下，添加1.0mM的Cu2+時，硝酸鹽有最佳的去除效果。Cu2+顯著增加硝酸鹽之還原去除效果，可能是由於Cu2+在鐵金屬表面被還原Cu0或Cu+，進而成為催化劑促進零價鐵還原能力。而於溶液中添加Fe2+也能提高零價鐵去除硝酸鹽的效果，但是，效果較添加Cu2+差。 The aim of this study was to explore the effect of different metal ions (such as Fe2+ and Cu2+) on the reduction of nitrate by nanoscale zero valent iron under various initial solution pH. Under the condition of initial solution pH=2, additional dosing of 1.0 mM Cu2+ could enhance the removal of nitrate more than Fe2+ did, which might be due to the generation of Cu+ or Cu0 reduced from Cu2+ on the surface of iron by Fe0. Cu+ or Cu0 could increase the reduction potential of Fe0.
