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

doi:10.2166/wst.2010.462

CNU IR > College of Sustainable Environment and Recreation > Dept. of Environmental Engineering and Science (including master's program) > Periodical Articles > Item 310902800/25333

Please use this identifier to cite or link to this item: https://ir.cnu.edu.tw/handle/310902800/25333

Title:	Removal of manganese ions from synthetic groundwater by oxidation using KMnO4 and the characterization of produced MnO2 particles
Authors:	P. Phatai J. Wittayakun N. Grisdanurak W. H. Chen M. W. Wan C. C. Kan
Contributors:	環境工程與科學系
Keywords:	KMnO4 MnO2 particle oxidation removal of manganese ions synthetic groundwater
Date:	2010-11
Issue Date:	2012-05-31 09:57:46 (UTC+8)
Abstract:	The aim of this study is to investigate the conditions for the removal of manganese ions from synthetic groundwater by oxidation using KMnO4 to keep the concentration below the allowed level (0.05 mg/L). The process includes low-level aeration and addition of KMnO4 in a Jar test system with Mn2 + concentration of 0.50 mg/L, similar to that of natural groundwater in Taiwan. Different parameters such us aeration-pH, oxidant dose, and stirring speed were studied. Aeration alone was not sufficient to remove Mn2 + ions completely even when the pH was increased. When a stoichiometric amount of KMnO4 (0.96 mg/L) was used, a complete Mn2 + removal was achieved within 15 min at an optimum pH of 8.0. As the amount of KMnO4 was doubled, lower removal efficiency was obtained because the oxidant also generated manganese ions. The removal of Mn2 + ions could be completed at pH 9.0 using an oxidant dose of 0.48 mg/L because Mn2 + could be sorbed onto the MnO2 particles. Finally, The MnO2 particles were characterized using scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDX).
Relation:	Water Science & Technology 62(8)：p.1719-1726
Appears in Collections:	[Dept. of Environmental Engineering and Science (including master's program)] Periodical Articles

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