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 language | English |
|---|---|
| Pages (from-to) | 883-891 |
| Number of pages | 9 |
| Journal | Chemosphere |
| Volume | 193 |
| DOIs | |
| Publication status | Published - 2018 Feb 1 |
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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 journal › Article
}
TY - JOUR
T1 - Mesoporous carbon for efficient removal of microcystin-LR in drinking water sources, Nak-Dong River, South Korea
T2 - Application to a field-scale drinking water treatment plant
AU - Park, Jeong Ann
AU - Jung, Sung Mok
AU - Choi, Jae Woo
AU - Kim, Jae Hyun
AU - Hong, Seungkwan
AU - Lee, Sang-Hyup
PY - 2018/2/1
Y1 - 2018/2/1
N2 - 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.
AB - 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.
KW - Cyanobacterial bloom
KW - Drinking water treatment plant
KW - Field-scale study
KW - Mesoporous carbon
KW - Microcystin-LR
KW - Pore diffusion
UR - http://www.scopus.com/inward/record.url?scp=85034857583&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85034857583&partnerID=8YFLogxK
U2 - 10.1016/j.chemosphere.2017.11.092
DO - 10.1016/j.chemosphere.2017.11.092
M3 - Article
VL - 193
SP - 883
EP - 891
JO - Chemosphere
JF - Chemosphere
SN - 0045-6535
ER -