以臭氧/紫外光處理環境荷爾蒙類物質-以雙酚A、壬基苯酚及辛基苯酚聚氧乙基醇為例

Abstract

本研究主要在利用臭氧/紫外線等高級氧化的方法，對水中環境荷爾蒙物質雙酚A(Bisphenol A，BPA)、壬基苯酚(Nonylphenol，NP)及辛基苯酚聚氧乙基醇(Octylphenol Polyethoxylate，OPEO)進行處理，探討使用臭氧/紫外線等程序降解BPA、NP及OPEO的可行性。 當臭氧在去離子水中分解BPA、NP及OPEO時，臭氧均可快速將上述物質氧化成中間產物，但無法完全將之礦化。針對BPA方面，提升臭氧劑量可加速降解BPA，紫外光結合氧氣有助降解BPA。臭氧結合紫外光處理較單獨臭氧處理緩慢。添加活性碳有助去除BPA，添加過氧化氫反而使處理效果變差，臭氧處理於酸性下較鹼性下佳。 NP方面，提升臭氧劑量可加速降解NP，紫外光結合氧氣有助降解NP, 臭氧結合紫外光處理趨勢較單獨臭氧處理緩慢，添加活性碳有助去除NP，添加過氧化氫反而使處理效果變差，臭氧處理於酸性下較鹼性下佳。 針對OPEO處理，提升臭氧劑量可加速降解OPEO，紫外光結合氧氣有助降解OPEO。臭氧結合紫外光處理趨勢較單獨臭氧處理緩慢，添加活性碳有助去除OPEO，添加過氧化氫反而使處理效果變差，臭氧處理於酸性下較鹼性下佳。 臭氧化BPA後生物可分解性反而降低，但不會增加樣品生物毒性。臭氧化NP後，生物可分解性明顯地被提升，並且也不會造成生物毒性的增加。臭氧化OPEO後，生物可分解性明顯地被提升，也不會造成生物毒性的提升。

Three compounds of environmental hormones, including Bisphenol A (BPA), Nonylphenol (NP) and Octylphenol Polyethoxylate (OPEO), have been widely detected in the rivers and effluent of the domestic wasterwater treatment plants. The objective of this study was to investigate the feasibility of several Advanced Oxidative Processes (AOPs) to degrade these three compounds. Based on the results, Granular Activated Carbon (GAC) enhanced the performance of ozonation for removing all selected pollutants. However, either combing with hydrogen dioxide (H2O2) or ultraviolet (UV), the removal efficiency of these compounds decreased during ozonation. During UV process, better removal efficiency for all three compounds happened under aeration. The results of BOD test imply the ozonation of NP and OPEO could promote the biodegradibilty . Overall, ozonation of all three compounds under acidic condition (pH=3) showed the better removal efficiency than under basic condition (pH=11).