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  5. 以二氧化錳去除水中多重藥物之研究
 
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以二氧化錳去除水中多重藥物之研究

Other Title
Removal of Multiple Pharmaceuticals in water by Manganese Dioxide
Type
thesis
Date Issued
2014-07-10
Author(s)
鄧祥寧
Advisor
胡景堯
Subjects
系所名稱:公共衛生學系暨研究所
Description
學位別:碩士
語文別:中文
指導教授:胡景堯
共同指導教授:
口試委員:官文惠;闕蓓德
中文關鍵字:乙醯胺酚;雙氯芬酸;磺胺甲噁唑;二氧化錳;化學分析影像能譜儀;高效液相層析儀;極致液相層析-四極桿飛行時間質譜儀
Abstract
隨著現代醫學發展與進步,人類用藥逐漸多元化,在廢水系統及表水系統皆有偵測到濃度範圍在ng/L~μg/L之人類用藥。相關研究指出,一些藥物長期接觸後可能會對人體或動植物有危害。
二氧化錳(MnO2)存在於土壤與底泥中,為自然界重要的氧化劑之一,具有良好的氧化還原能力,能有效降解有機污染物,其具有高的還原電位,對於酚(Phenol)、氯酚(Chlorophenol)、苯胺(Anilines)、及磷酸類(Phosphonate)化合物有良好的分解效果。先前關於二氧化錳去除藥物之研究多只針對一種藥物,但廢水中通常存在多種藥物。因此在多重藥物系統中,應有系統性的調查藥物在二氧化錳上的吸附及氧化之競爭情形。本研究選用三種不同類型、廣泛被人類使用、且經常在表廢水系統中偵測到之藥物,分別為乙醯胺酚、雙氯芬酸、及磺胺甲噁唑探討多重藥物在二氧化錳表面的吸附氧化情形,並且調查二氧化錳劑量、酸鹼值、及溫度的影響。
實驗結果發現,環境酸鹼值會顯著影響藥物去除率,三種藥物皆是酸性為去除之最佳條件,而乙醯胺酚在鹼性去除效果優於中性,在雙氯芬酸及磺胺甲噁唑則是中性的去除效果優於鹼性,觀察到與先前研究有相似的結果。
而二氧化錳的劑量增加以及溫度提高也會增加藥物之去除率。化學分析影像能譜儀(ESCA)結果顯示,當酸鹼值增加,則二氧化錳表面二價錳之比例也隨著上升。副產物定性部份,使用UPLC-Q-TOF-MS鑑定其副產物,發現到酸性環境下,雙氯芬酸有一個副產物,鹼性條件下,會產生乙醯胺酚之二聚體及三聚體,此研究有助於進一步了解藥物在自然環境中的宿命。
URI
https://203.71.86.71/handle/123456789/56677

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