Adsorption of microcystin-LR on mesoporous carbons and its potential use in drinking water source

Jeong Ann Park, Sung Mok Jung, In Geol Yi, Jae Woo Choi, Song Bae Kim, Sang-Hyup Lee

Research output: Contribution to journalArticle

12 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)15-23
Number of pages9
JournalChemosphere
Volume177
DOIs
Publication statusPublished - 2017

Fingerprint

Drinking Water
Carbon
drinking water
adsorption
Adsorption
carbon
Humic Substances
Water treatment plants
cyanoginosin LR
humic substance
Biological materials
Adsorbents
toxin
Pore size
Water quality
Isotherms
algal bloom
isotherm
thermodynamics
Rivers

Keywords

  • Adsorption
  • Drinking water source
  • Mesoporous carbon
  • Microcystin-LR
  • Pore diffusion
  • Water quality parameter

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry

Cite this

Adsorption of microcystin-LR on mesoporous carbons and its potential use in drinking water source. / Park, Jeong Ann; Jung, Sung Mok; Yi, In Geol; Choi, Jae Woo; Kim, Song Bae; Lee, Sang-Hyup.

In: Chemosphere, Vol. 177, 2017, p. 15-23.

Research output: Contribution to journalArticle

Park, Jeong Ann ; Jung, Sung Mok ; Yi, In Geol ; Choi, Jae Woo ; Kim, Song Bae ; Lee, Sang-Hyup. / Adsorption of microcystin-LR on mesoporous carbons and its potential use in drinking water source. In: Chemosphere. 2017 ; Vol. 177. pp. 15-23.
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