Removal of manganese ions from artificial groundwater by oxidation using KMnO4 and characterization of produced MnO2 particles

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標題:	Removal of manganese ions from artificial groundwater by oxidation using KMnO4 and characterization of produced MnO2 particles
作者:	Piaw Phatai Jatuporn Wittayakun Nurak Grisdanurak Wen-Hsiang Chen Meng-Wei Wan Chi-Chuan Kan
貢獻者:	環境工程與科學系
關鍵字:	Manganese removal MnO2 particle Adsorption behavior Groundwater
日期:	2009-10-18
上傳時間:	2011-11-14 16:37:24 (UTC+8)
摘要:	The aim of this research is to investigate conditions for the removal of manganese ions from artificial groundwater by oxidation with KMnO4 to keep their concentration below the allowed levels (0.05 mg/L). The process includes low-level aeration and KMnO4 combination in a Jar test system. The manganese oxide (MnO2) particles produced from oxidation were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDX). The particles were in amorphous phase and were active adsorption sites for the removal of manganese ions. Parameters in the oxidation were solution pH, oxidant dosage, and stirring speed. The optimum solution pH was 8.0 which gave a complete Mn removal within 15 min. An increase of stirring speed diminished the rate of oxygen transfer and the proper speed was 120 rpm. Conversely, the adsorption activity of the particles at pH 9.0 complemented the oxidation of manganese ions exhibiting analogous effect with less consumption of KMnO4 than the required theoretical amount to complete the reaction.
關聯:	3rd IWA-ASPIRE Conference and Exhibition，起迄日：2009/10/18~2009/10/22，地點：台北
顯示於類別:	[環境工程與科學系(所)] 會議論文

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