Adsorption of microcystin-LR on mesoporous carbons and its potential use in drinking water source
- Authors
- Park, Jeong-Ann; Jung, Sung-Mok; Yi, In-Geol; Choi, Jae-Woo; Kim, Song-Bae; Lee, Sang-Hyup
- Issue Date
- 6월-2017
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Mesoporous carbon; Adsorption; Microcystin-LR; Pore diffusion; Water quality parameter; Drinking water source
- Citation
- CHEMOSPHERE, v.177, pp.15 - 23
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMOSPHERE
- Volume
- 177
- Start Page
- 15
- End Page
- 23
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/83294
- DOI
- 10.1016/j.chemosphere.2017.02.150
- ISSN
- 0045-6535
- Abstract
- Microcystin-LR (MC-LR) is a common toxin derived from cyanobacterial blooms an effective, rapid and non-toxic method needs to be developed for its removal from drinking water treatment plants (DWTP). For an adsorption-based method, mesoporous carbon can be a promising supplemental adsorbent. The effect of mesoporous carbon (MCI, MC2, and MC3) properties and water quality parameters on the adsorption of MC-LR were investigated and the results were analyzed by kinetic, isotherm, thermodynamic, Derjaguin-Landau-Verwey-Overbeek (DLVO), and intraparticle diffusion models. MC1 was the most appropriate type for the removal of MC-LR with a maximum adsorption capacity of 35,670.49 mu g/g. Adsorption of MC-LR is a spontaneous reaction dominated by van der Waals interactions. Pore sizes of 8.5 14 nm enhance the pore diffusion of MC-LR from the surface to the mesopores of MC1. The adsorption capacity was not sensitive to changes in the pH (3.2-8.0) and the existence of organic matter (2-5 mg/L). Furthermore, the final concentration of MC-LR was below the WHO guideline level after a 10-min reaction with 20 mg/L of MC1 in the Nak-Dong River, a drinking water source. The MC-LR adsorption mainly competed with humic substances (500-1000 g/mole); however, they did not have a great effect on adsorption. (C) 2017 Published by Elsevier Ltd.
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