奈米氧化鋅與奈米銀微粒在都市污水處理系統中流布之研究

Transports and fates of zinc oxide and silver nanoparticles in municipal wastewater treatment plants.

楊政達(Cheng-Ta Yang)

指導教授 ： 蔡勇斌

國立暨南國際大學/科技學院/土木工程學系/碩士(2015年)

摘要

本研究探討二種不同奈米金屬微粒(奈米氧化鋅及奈米銀)，在污水處理系統中之流布、對碳源攝取抑制及對氮系營養鹽去除情形抑制。SBR實驗結果顯示，在長期馴養期間，分兩階段添加奈米氧化鋅對碳源攝取、氮系營養源去除率及硝化率並無顯著影響；直接添加30 mgL-1 奈米氧化鋅對碳源去除率影響顯著，但對氮系營養源去除率無顯著影響；添加10 mgL-1 奈米銀時，對碳源攝取及氮系營養源去除率並無顯著影響。
批次實驗結果顯示不管是添加奈米氧化鋅或是奈米銀對於碳的去除及氮系營養鹽去除之抑制情形均在10%以內。添加奈米銀各項去除率回復情形優於添加奈米氧化鋅之組別。
隨馴養時間增加，系統中Zn2+及Ag之質量隨之減少，奈米氧化鋅及奈米銀在系統內各階段之質量也隨著時間遞減。奈米氧化鋅離開系統方式為隨著放流水及廢棄污泥離開系統。奈米銀則是以廢棄污泥的方式離開系統。

關鍵字

奈米氧化鋅 ； 奈米銀 ； 奈米毒性 ； 奈米流布

並列摘要

This study explored the impact of carbon uptake, nitrogen removal and fate of ZnO and Ag nanoparticles in municipal wastewater treatment. The experiment of SBR show that during the long time domestication, add the ZnO nanoparticles in two phases is not significant of carbon uptake and nitrogen removal. Directly add ZnO NP 30 mgL-1 the impact of carbon uptake is significant but the impact of nitrogen removal is not significant. There are not significant effect in carbon uatake and nitrogen removal in adding 10 mgL-1 Ag nanoparticles.
Add 10 mgL-1 Ag and ZnO nanoparticles in batch test show the effect of carbon uatake and nitrogen removal are both less than 10%. Adding Ag nanoparticles the recovery in carbon uatake and nitrogen removal is batter than addind ZnO nanoparticles.
With the domestication of time increase, the metal mass in system are reduce.ZnO nanoparticles leave the system by two ways. One way is in effluents another way is in waste sludge. Ag nanoparticles leave the system by waste sludge.

並列關鍵字

ZnO nanoparticle ； Ag nanoparticle ； nano toxic ； nano fate

參考文獻

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