Evaluation of biochar-ultrafiltration membrane processes for humic acid removal under various hydrodynamic, pH, ionic strength, and pressure conditions

Vaibhavi Shankar; Jiyong Heo; Yasir A.J. Al-Hamadani; Chang Min Park; Kyoung Hoon Chu; Yeomin Yoon

doi:10.1016/j.jenvman.2017.04.040

Evaluation of biochar-ultrafiltration membrane processes for humic acid removal under various hydrodynamic, pH, ionic strength, and pressure conditions

Vaibhavi Shankar, Jiyong Heo, Yasir A.J. Al-Hamadani, Chang Min Park, Kyoung Hoon Chu, Yeomin Yoon

Department of Environmental Science & Engineering

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

The performance of an ultrafiltration (UF)-biochar process was evaluated in comparison with a UF membrane process for the removal of humic acid (HA). Bench-scale UF experiments were conducted to study the rejection and flux trends under various hydrodynamic, pH, ionic strength, and pressure conditions. The resistance-in-series model was used to evaluate the processes and it showed that unlike stirred conditions, where low fouling resistance was observed (28.7 × 10¹² m⁻¹ to 32.5 × 10¹² m⁻¹), higher values and comparable trends were obtained for UF-biochar and UF alone for unstirred conditions (28.7 × 10¹² m⁻¹ to 32.5 × 10¹² m⁻¹). Thus, the processes were further evaluated under unstirred conditions. Additionally, total fouling resistance was decreased in the presence of biochar by 6%, indicating that HA adsorption by biochar could diminish adsorption fouling on the UF membrane and thus improve the efficiency of the UF-biochar process. The rejection trends of UF-biochar and UF alone were similar in most cases, whereas UF-biochar showed a noticeable increase in flux of around 18–25% under various experimental conditions due to reduced membrane fouling. Three-cycle filtration tests further demonstrated that UF-biochar showed better membrane recovery and antifouling capability by showing more HA rejection (3–5%) than UF membrane alone with each subsequent cycle of filtration. As a result of these findings, the UF-biochar process may potentially prove be a viable treatment option for the removal of HA from water.

Original language	English
Pages (from-to)	610-618
Number of pages	9
Journal	Journal of Environmental Management
Volume	197
DOIs	https://doi.org/10.1016/j.jenvman.2017.04.040
State	Published - 15 Jul 2017

Bibliographical note

Funding Information:
This research was supported by a grant (code 17IFIP-B088091-04) from Industrial Facilities & Infrastructure Research Program funded by Ministry of Land, Infrastructure and Transport of Korean government.

Publisher Copyright:
© 2017 Elsevier Ltd

Keywords

Antifouling capability
Biochar
Humic acid
Membrane recovery
Ultrafiltration

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10.1016/j.jenvman.2017.04.040

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@article{a7a68da397af46b088c96a032fee77d5,

title = "Evaluation of biochar-ultrafiltration membrane processes for humic acid removal under various hydrodynamic, pH, ionic strength, and pressure conditions",

abstract = "The performance of an ultrafiltration (UF)-biochar process was evaluated in comparison with a UF membrane process for the removal of humic acid (HA). Bench-scale UF experiments were conducted to study the rejection and flux trends under various hydrodynamic, pH, ionic strength, and pressure conditions. The resistance-in-series model was used to evaluate the processes and it showed that unlike stirred conditions, where low fouling resistance was observed (28.7 × 1012 m−1 to 32.5 × 1012 m−1), higher values and comparable trends were obtained for UF-biochar and UF alone for unstirred conditions (28.7 × 1012 m−1 to 32.5 × 1012 m−1). Thus, the processes were further evaluated under unstirred conditions. Additionally, total fouling resistance was decreased in the presence of biochar by 6%, indicating that HA adsorption by biochar could diminish adsorption fouling on the UF membrane and thus improve the efficiency of the UF-biochar process. The rejection trends of UF-biochar and UF alone were similar in most cases, whereas UF-biochar showed a noticeable increase in flux of around 18–25% under various experimental conditions due to reduced membrane fouling. Three-cycle filtration tests further demonstrated that UF-biochar showed better membrane recovery and antifouling capability by showing more HA rejection (3–5%) than UF membrane alone with each subsequent cycle of filtration. As a result of these findings, the UF-biochar process may potentially prove be a viable treatment option for the removal of HA from water.",

keywords = "Antifouling capability, Biochar, Humic acid, Membrane recovery, Ultrafiltration",

author = "Vaibhavi Shankar and Jiyong Heo and Al-Hamadani, {Yasir A.J.} and Park, {Chang Min} and Chu, {Kyoung Hoon} and Yeomin Yoon",

note = "Funding Information: This research was supported by a grant (code 17IFIP-B088091-04) from Industrial Facilities & Infrastructure Research Program funded by Ministry of Land, Infrastructure and Transport of Korean government. Publisher Copyright: {\textcopyright} 2017 Elsevier Ltd",

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AU - Shankar, Vaibhavi

AU - Heo, Jiyong

AU - Al-Hamadani, Yasir A.J.

AU - Park, Chang Min

AU - Chu, Kyoung Hoon

AU - Yoon, Yeomin

N1 - Funding Information: This research was supported by a grant (code 17IFIP-B088091-04) from Industrial Facilities & Infrastructure Research Program funded by Ministry of Land, Infrastructure and Transport of Korean government. Publisher Copyright: © 2017 Elsevier Ltd

PY - 2017/7/15

Y1 - 2017/7/15

N2 - The performance of an ultrafiltration (UF)-biochar process was evaluated in comparison with a UF membrane process for the removal of humic acid (HA). Bench-scale UF experiments were conducted to study the rejection and flux trends under various hydrodynamic, pH, ionic strength, and pressure conditions. The resistance-in-series model was used to evaluate the processes and it showed that unlike stirred conditions, where low fouling resistance was observed (28.7 × 1012 m−1 to 32.5 × 1012 m−1), higher values and comparable trends were obtained for UF-biochar and UF alone for unstirred conditions (28.7 × 1012 m−1 to 32.5 × 1012 m−1). Thus, the processes were further evaluated under unstirred conditions. Additionally, total fouling resistance was decreased in the presence of biochar by 6%, indicating that HA adsorption by biochar could diminish adsorption fouling on the UF membrane and thus improve the efficiency of the UF-biochar process. The rejection trends of UF-biochar and UF alone were similar in most cases, whereas UF-biochar showed a noticeable increase in flux of around 18–25% under various experimental conditions due to reduced membrane fouling. Three-cycle filtration tests further demonstrated that UF-biochar showed better membrane recovery and antifouling capability by showing more HA rejection (3–5%) than UF membrane alone with each subsequent cycle of filtration. As a result of these findings, the UF-biochar process may potentially prove be a viable treatment option for the removal of HA from water.

AB - The performance of an ultrafiltration (UF)-biochar process was evaluated in comparison with a UF membrane process for the removal of humic acid (HA). Bench-scale UF experiments were conducted to study the rejection and flux trends under various hydrodynamic, pH, ionic strength, and pressure conditions. The resistance-in-series model was used to evaluate the processes and it showed that unlike stirred conditions, where low fouling resistance was observed (28.7 × 1012 m−1 to 32.5 × 1012 m−1), higher values and comparable trends were obtained for UF-biochar and UF alone for unstirred conditions (28.7 × 1012 m−1 to 32.5 × 1012 m−1). Thus, the processes were further evaluated under unstirred conditions. Additionally, total fouling resistance was decreased in the presence of biochar by 6%, indicating that HA adsorption by biochar could diminish adsorption fouling on the UF membrane and thus improve the efficiency of the UF-biochar process. The rejection trends of UF-biochar and UF alone were similar in most cases, whereas UF-biochar showed a noticeable increase in flux of around 18–25% under various experimental conditions due to reduced membrane fouling. Three-cycle filtration tests further demonstrated that UF-biochar showed better membrane recovery and antifouling capability by showing more HA rejection (3–5%) than UF membrane alone with each subsequent cycle of filtration. As a result of these findings, the UF-biochar process may potentially prove be a viable treatment option for the removal of HA from water.

KW - Antifouling capability

KW - Biochar

KW - Humic acid

KW - Membrane recovery

KW - Ultrafiltration

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DO - 10.1016/j.jenvman.2017.04.040

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C2 - 28432886

AN - SCOPUS:85017515905

SN - 0301-4797

VL - 197

SP - 610

EP - 618

JO - Journal of Environmental Management

JF - Journal of Environmental Management

ER -

Evaluation of biochar-ultrafiltration membrane processes for humic acid removal under various hydrodynamic, pH, ionic strength, and pressure conditions

Abstract

Bibliographical note

Keywords

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