Mesoporous carbon for efficient removal of microcystin-LR in drinking water sources, Nak-Dong River, South Korea

Application to a field-scale drinking water treatment plant

Jeong Ann Park, Sung Mok Jung, Jae Woo Choi, Jae Hyun Kim, Seungkwan Hong, Sang-Hyup Lee

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Microcystin-LR (MC-LR) is a growing issue as it is toxic and difficult to remove in drinking water treatment plants (DWTPs). Mesoporous carbon (MC) is evaluated as an alternative adsorbent for MC-LR removal and compared with three widely-used powdered activated carbons (PACs). MC was more favorable for MC-LR removal than PACs. MC-LR adsorption on MC was a rapid process (k2 = 1.02 × 10−4 g/μg/min) that completed within 15 min, while adsorption on PACs took 60 min. The maximum adsorption capacity of MC-LR was 18,008 μg/g (MC), which was higher than that of the PACs. Two mechanisms were associated with adsorption: the small hydro-dynamic diameter of MC in an aqueous solution increased the instantaneous attraction of MC-LR to its surface, and the numerous mesopores enhanced pore diffusion. The MC could remove MC-LR to meet the drinking water guidance level (1 μg/L) from an the MC-LR concentration range of 5–20 μg/L in drinking water sources, and 10 min of treatment was sufficient to meet this level (MC dose = 20 mg/L). The field-scale DWTP was operated by adding 1 or 5 mg/L MC to the mixing basin, and 49.49% and 74.50% of MC-LR was removed, respectively. Geosmin and 2-methylisoborneol were slightly reduced when 5 mg/L of MC was applied.

Original languageEnglish
Pages (from-to)883-891
Number of pages9
JournalChemosphere
Volume193
DOIs
Publication statusPublished - 2018 Feb 1

Fingerprint

Water treatment plants
Drinking Water
Carbon
Rivers
drinking water
carbon
river
Activated carbon
activated carbon
adsorption
Adsorption
cyanoginosin LR
drinking water treatment
removal
water treatment plant
Poisons
Adsorbents
water level
aqueous solution

Keywords

  • Cyanobacterial bloom
  • Drinking water treatment plant
  • Field-scale study
  • Mesoporous carbon
  • Microcystin-LR
  • Pore diffusion

ASJC Scopus subject areas

  • Environmental Chemistry
  • Chemistry(all)

Cite this

Mesoporous carbon for efficient removal of microcystin-LR in drinking water sources, Nak-Dong River, South Korea : Application to a field-scale drinking water treatment plant. / Park, Jeong Ann; Jung, Sung Mok; Choi, Jae Woo; Kim, Jae Hyun; Hong, Seungkwan; Lee, Sang-Hyup.

In: Chemosphere, Vol. 193, 01.02.2018, p. 883-891.

Research output: Contribution to journalArticle

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abstract = "Microcystin-LR (MC-LR) is a growing issue as it is toxic and difficult to remove in drinking water treatment plants (DWTPs). Mesoporous carbon (MC) is evaluated as an alternative adsorbent for MC-LR removal and compared with three widely-used powdered activated carbons (PACs). MC was more favorable for MC-LR removal than PACs. MC-LR adsorption on MC was a rapid process (k2 = 1.02 × 10−4 g/μg/min) that completed within 15 min, while adsorption on PACs took 60 min. The maximum adsorption capacity of MC-LR was 18,008 μg/g (MC), which was higher than that of the PACs. Two mechanisms were associated with adsorption: the small hydro-dynamic diameter of MC in an aqueous solution increased the instantaneous attraction of MC-LR to its surface, and the numerous mesopores enhanced pore diffusion. The MC could remove MC-LR to meet the drinking water guidance level (1 μg/L) from an the MC-LR concentration range of 5–20 μg/L in drinking water sources, and 10 min of treatment was sufficient to meet this level (MC dose = 20 mg/L). The field-scale DWTP was operated by adding 1 or 5 mg/L MC to the mixing basin, and 49.49{\%} and 74.50{\%} of MC-LR was removed, respectively. Geosmin and 2-methylisoborneol were slightly reduced when 5 mg/L of MC was applied.",
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