Photochemical Oxidation of Polyethylene Glycol in Aqueous Solution by UV/H2O2 with Steel Waste

煉鋼廢棄物結合UV/H2O2以分解水溶液中之聚乙烯醇

邱求三(Chyow-San Chiou) ； 陳奕宏(Yi-Hung Chen) ； 張慶源(Ching-Yuan Chang) ； 謝哲隆(Je-Lueng Shie) ； 劉鎮宗(Cheng-Chung Liu) ； 張章堂(Chang-Tang Chang)

《Journal of the Chinese Institute of Chemical Engineers》 37卷4期 (2006/07) Pp. 321-328

https://doi.org/10.6967/JCICE.200607.0321

摘要

煉鋼廢棄物中之轉爐石其富含Fe(上標 2+)，可應用來催化雙氧水以啟動費頓反應，進而產生氫氧自由基來礦化有機污染物，費頓反應後所產生之Fe(上標 3+)可藉由紫外光的照射而轉換成Fe(上標 2+)，如此便可持續催化雙氧水，且紫外光亦可分解雙氧水以產生氫氧自由基，進而提升有機物礦化的效率，本實驗便利用轉爐石於UV/H2O2的存在下以礦化水溶液中的聚乙烯醇，實驗發現在pH=2.5、UV光強度為120μW/平方公分，雙氧水及轉爐石添加量分別為2.49×10^(-4)mol/min-L及25g/L時，於90分鐘之反應時間，對PEG可達79.5%的最佳礦化效率，並將此礦化效率以動力學的方式加以描述。

並列摘要

This study evaluated the performance of the photo-Fenton reaction when it was initiated using UV/H2O2 with steel waste and basic oxygen furnace slag (BOF slag), here called the UV/H2O2/BOF slag process, in order to decompose polyethylene glycol (PEG) in aqueous solution. The concentration of total organic carbon (TOC) was chosen as a mineralization index of the decomposition of PEG in the UV/H2O2/BOF slag process. A first-order kinetic model with respect to TOC was appropriately adopted to represent the mineralization of PEG in the UV/H2O2/BOF slag process. The experimental results obtained in this study suggest that dosages with 2.49×10^(-4) mol/min-L H2O2 and 25 g/L BOF slag loading in a solution at pH=2.5 with 120 μW/cm^2 UV provided the optimal operation conditions for the mineralization of PEG, yielding 79.5% mineralization efficiency after 90 min of reaction time.

並列關鍵字

Photo-Fenton ； Mineralization ； Basic oxygen furnace slag ； UV/H2O2 ； Polyethylene glycol