Abstract
Fixed-bed kinetic sorption (Bohart–Adams, Thomas, Yoon–Nelson, Clark, Wolborska, and modified dose-response) models are commonly used to simulate breakthrough curves (BTCs) from fixed-bed systems. However, more caution should be taken in using these models. Some researchers misused the equation, which is a totally different type from the original model, as a simplified model. Others used the same equation expressed in different forms as an independent model. The aim of this study was to clarify the fixed-bed sorption models via comparative analysis using the phosphate BTCs in slag filter media. For the analysis, the breakthrough data for phosphate (initial phosphate concentration = 1.0 and 2.0 mg/L) sorption in fixed-bed columns (inner diameter = 2.5 cm and column length = 10, 20, and 30 cm) were obtained from the experiments. The original Bohart–Adams model was simplified in the literature to the convergent- and divergent-type models in order to be used for the BTC analysis. However, the divergent-type model, which is equivalent to the Wolborska model, should not be the type of Bohart–Adams model used, because it behaves totally different from the original model. Also, the Thomas and Yoon–Nelson models should not be used simultaneously with the Bohart–Adams model, because they are equivalent to the simplified convergent-type Bohart–Adams model, and the parameters of both of the models (k<inf>T</inf>, q<inf>0</inf>, k<inf>YN</inf>, and τ) can easily be calculated from the Bohart–Adams model parameters (k<inf>BA</inf> and N<inf>0</inf>). The Bohart–Adams, Clark, and modified dose-response models could describe the BTCs relatively well with a high determination coefficient and a low chi-square coefficient. From this study, the Bohart–Adams, Clark, and modified dose-response models are recommended for the BTC analysis, because these models can provide useful design parameters (k<inf>BA</inf>, N<inf>0</inf>, Z<inf>0</inf>, t<inf>b</inf>, and q<inf>0</inf>) for the fixed-bed systems.
| Original language | English |
|---|---|
| Pages (from-to) | 1795-1805 |
| Number of pages | 11 |
| Journal | Desalination and Water Treatment |
| Volume | 55 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2015 Aug 14 |
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Keywords
- Bohart–Adams model
- Breakthrough curves
- Clark model
- Fixed-bed kinetic sorption models
- Modified dose-response model
- Slag filter media
ASJC Scopus subject areas
- Pollution
- Water Science and Technology
- Ocean Engineering
Cite this
Comparative analysis of fixed-bed sorption models using phosphate breakthrough curves in slag filter media. / Lee, Chang Gu; Kim, Jae Hyun; Kang, Jin Kyu; Kim, Song Bae; Park, Seong Jik; Lee, Sang-Hyup; Choi, Jae Woo.
In: Desalination and Water Treatment, Vol. 55, No. 7, 14.08.2015, p. 1795-1805.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Comparative analysis of fixed-bed sorption models using phosphate breakthrough curves in slag filter media
AU - Lee, Chang Gu
AU - Kim, Jae Hyun
AU - Kang, Jin Kyu
AU - Kim, Song Bae
AU - Park, Seong Jik
AU - Lee, Sang-Hyup
AU - Choi, Jae Woo
PY - 2015/8/14
Y1 - 2015/8/14
N2 - Fixed-bed kinetic sorption (Bohart–Adams, Thomas, Yoon–Nelson, Clark, Wolborska, and modified dose-response) models are commonly used to simulate breakthrough curves (BTCs) from fixed-bed systems. However, more caution should be taken in using these models. Some researchers misused the equation, which is a totally different type from the original model, as a simplified model. Others used the same equation expressed in different forms as an independent model. The aim of this study was to clarify the fixed-bed sorption models via comparative analysis using the phosphate BTCs in slag filter media. For the analysis, the breakthrough data for phosphate (initial phosphate concentration = 1.0 and 2.0 mg/L) sorption in fixed-bed columns (inner diameter = 2.5 cm and column length = 10, 20, and 30 cm) were obtained from the experiments. The original Bohart–Adams model was simplified in the literature to the convergent- and divergent-type models in order to be used for the BTC analysis. However, the divergent-type model, which is equivalent to the Wolborska model, should not be the type of Bohart–Adams model used, because it behaves totally different from the original model. Also, the Thomas and Yoon–Nelson models should not be used simultaneously with the Bohart–Adams model, because they are equivalent to the simplified convergent-type Bohart–Adams model, and the parameters of both of the models (kT, q0, kYN, and τ) can easily be calculated from the Bohart–Adams model parameters (kBA and N0). The Bohart–Adams, Clark, and modified dose-response models could describe the BTCs relatively well with a high determination coefficient and a low chi-square coefficient. From this study, the Bohart–Adams, Clark, and modified dose-response models are recommended for the BTC analysis, because these models can provide useful design parameters (kBA, N0, Z0, tb, and q0) for the fixed-bed systems.
AB - Fixed-bed kinetic sorption (Bohart–Adams, Thomas, Yoon–Nelson, Clark, Wolborska, and modified dose-response) models are commonly used to simulate breakthrough curves (BTCs) from fixed-bed systems. However, more caution should be taken in using these models. Some researchers misused the equation, which is a totally different type from the original model, as a simplified model. Others used the same equation expressed in different forms as an independent model. The aim of this study was to clarify the fixed-bed sorption models via comparative analysis using the phosphate BTCs in slag filter media. For the analysis, the breakthrough data for phosphate (initial phosphate concentration = 1.0 and 2.0 mg/L) sorption in fixed-bed columns (inner diameter = 2.5 cm and column length = 10, 20, and 30 cm) were obtained from the experiments. The original Bohart–Adams model was simplified in the literature to the convergent- and divergent-type models in order to be used for the BTC analysis. However, the divergent-type model, which is equivalent to the Wolborska model, should not be the type of Bohart–Adams model used, because it behaves totally different from the original model. Also, the Thomas and Yoon–Nelson models should not be used simultaneously with the Bohart–Adams model, because they are equivalent to the simplified convergent-type Bohart–Adams model, and the parameters of both of the models (kT, q0, kYN, and τ) can easily be calculated from the Bohart–Adams model parameters (kBA and N0). The Bohart–Adams, Clark, and modified dose-response models could describe the BTCs relatively well with a high determination coefficient and a low chi-square coefficient. From this study, the Bohart–Adams, Clark, and modified dose-response models are recommended for the BTC analysis, because these models can provide useful design parameters (kBA, N0, Z0, tb, and q0) for the fixed-bed systems.
KW - Bohart–Adams model
KW - Breakthrough curves
KW - Clark model
KW - Fixed-bed kinetic sorption models
KW - Modified dose-response model
KW - Slag filter media
UR - http://www.scopus.com/inward/record.url?scp=84938743440&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84938743440&partnerID=8YFLogxK
U2 - 10.1080/19443994.2014.930698
DO - 10.1080/19443994.2014.930698
M3 - Article
AN - SCOPUS:84938743440
VL - 55
SP - 1795
EP - 1805
JO - Desalination and Water Treatment
JF - Desalination and Water Treatment
SN - 1944-3994
IS - 7
ER -