title: Adsorption of microcystin-LR on mesoporous carbons and its potential use in drinking water source.
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 (MC1, 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 μg/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.
authors.affiliation: Center for Water Resource Cycle, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea.
authors.forename: Jeong-Ann
authors.initials: JA
authors.lastname: Park
authors.affiliation: Center for Water Resource Cycle, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea.
authors.forename: Sung-Mok
authors.initials: SM
authors.lastname: Jung
authors.affiliation: Environment R&D Center, KORBI, Co., Ltd, Gyeonggi, 14059, Republic of Korea.
authors.forename: In-Geol
authors.initials: IG
authors.lastname: Yi
authors.affiliation: Center for Water Resource Cycle, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea.
authors.forename: Jae-Woo
authors.initials: JW
authors.lastname: Choi
authors.affiliation: Department of Rural Systems Engineering and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea.
authors.forename: Song-Bae
authors.initials: SB
authors.lastname: Kim
authors.affiliation: Center for Water Resource Cycle, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea; Green School, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea. Electronic address: yisanghyup@kist.re.kr.
authors.forename: Sang-Hyup
authors.initials: SH
authors.lastname: Lee
mesh_terms: D000327:Adsorption; D002244:Carbon; D000458:Cyanobacteria / Q000737:chemistry; D004058:Diffusion; D060766:Drinking Water / Q000737:chemistry*; D006812:Humic Substances; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008387:Marine Toxins; D052998:Microcystins / Q000032:analysis*; D046529:Microscopy, Electron, Transmission; D056910:Republic of Korea; D045483:Rivers; D053719:Tandem Mass Spectrometry; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*; D060753:Water Quality
chemical_list: D060766:Drinking Water; D006812:Humic Substances; D008387:Marine Toxins; D052998:Microcystins; D014874:Water Pollutants, Chemical; D002244:Carbon; C057862:cyanoginosin LR
keywords: Adsorption; Drinking water source; Mesoporous carbon; Microcystin-LR; Pore diffusion; Water quality parameter