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Simultaneous control of algal micropollutants based on ball-milled powdered activated carbon in combination with permanganate oxidation and coagulation

Title
Simultaneous control of algal micropollutants based on ball-milled powdered activated carbon in combination with permanganate oxidation and coagulation
Authors
CHO, KANGWOOAhn, Byung MinSo, SoohyunChae, AnaSong, Kyung Guen
Date Issued
15-Oct-2020
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Abstract
This study reports application of KMnO4 pre-oxidation and engineered powdered activated carbon (PAC) adsorption to simultaneously control geosmin, 2-methylisoborneol (2-MIB), and microcystin-LR (MC-LR) in conventional drinking water treatment plants (DWTPs). Pulverization of commercial wood-based PAC (1 mm ZrO2 ball, 12 h) reduced the median size to similar to 6 mu m and resulted in overall enhanced kinetics for adsorption of the algal micropollutants. A series of parametric experiments were performed to estimate minimal contact for KMnO4 (1 mg L-1, 10 minutes) and PAC (20 mg L-1, 40 minutes) prior to coagulation, with the aim to meet guidelines (0.02, 0.02, and 1 mu g L-1 for geosmin, 2-MIB, and MC-LR, respectively) at specific influent concentrations (0.1, 0.1, and 100 mu g L-1) in surface water matrix. Ball-milling of parent PAC with a low oxygen content (similar to 2.5 w/w%) could avoid interferences from/to the KMnO4 pre-oxidation and subsequent coagulation. Pilot-scale experiments confirmed the compatibility of the combined KMnO4 and PAC at existing DWTPs. (C) 2020 Elsevier Ltd. All rights reserved.
Keywords
NATURAL ORGANIC-MATTER; KINETIC-MODEL ANALYSIS; MICROCYSTIN-LR; ADSORPTION; 2-METHYLISOBORNEOL; REMOVAL; GEOSMIN; SUPERFINE; WATER; ELIMINATION
URI
http://oasis.postech.ac.kr/handle/2014.oak/104129
ISSN
0043-1354
Article Type
Article
Citation
WATER RESEARCH, vol. 185, 2020-10-15
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조강우CHO, KANGWOO
Div of Environmental Science & Enginrg
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