Boron-doped diamond (BDD) electro-oxidation coupled with nanofiltration for secondary wastewater treatment: Antibiotics degradation and biofouling
In this study, a boron-doped diamond (BDD) electro-oxidation technology coupled with nanofiltration membrane (EO-NF) technology was investigated for its effectiveness in removing antibiotics (i.e., sulfamethazine:SMZ) and mitigating biofouling during secondary wastewater treatment. The result showed...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-01-01
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| Series: | Environment International |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0160412020322467 |
| _version_ | 1818601606733627392 |
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| author | Xing Du Zhuoyu Mo Ziyang Li Wenxiang Zhang Yunlong Luo Jinxu Nie Zhihong Wang Heng Liang |
| author_facet | Xing Du Zhuoyu Mo Ziyang Li Wenxiang Zhang Yunlong Luo Jinxu Nie Zhihong Wang Heng Liang |
| author_sort | Xing Du |
| collection | DOAJ |
| description | In this study, a boron-doped diamond (BDD) electro-oxidation technology coupled with nanofiltration membrane (EO-NF) technology was investigated for its effectiveness in removing antibiotics (i.e., sulfamethazine:SMZ) and mitigating biofouling during secondary wastewater treatment. The result showed that EO obtained an effective SMZ removal, owing to the ·OH generation observed by Electron paramagnetic resonance (EPR) analysis; complete elimination of SMZ was found under the high current density (30 mA/cm2) and long Electrolysis Time (ET = 60 min). Meanwhile, EO-NF process enabled to reduce COD content from 60 mg/L to nearly 5 mg/L. Furthermore, regardless of the effect of EO process, NF could retain most NH3-N because of the excellent performance of NF for ions rejection, and its permeate concentration was below 0.5 mg/L. EO was able to reduce membrane fouling notably, increasing the final flux (15 L/(m2·h)) of NF by 25.1% during long-term operation (240 h). Scanning electron microscopy-Energy dispersive spectrometry (SEM-EDS) showed that a porous layer formed on the vicinity of NF membrane in the case of filtrating EO effluent, in contrast to a uniform and dense biofouling layer generated during the direct NF. Besides, the content of adenosine triphosphate (ATP) and the number of bacterial colonies in the retentate of the EO-NF process were greater than those of the direct NF process. This resulted in a smaller amount of extracellular polymeric substances (EPS) attaching to the membrane surface, decreasing the tightness and hardness of the fouling layer in the case of EO, as indicated by CLSM analysis. Overall, considering its ability to effectively eliminate persistent contaminants and reduce membrane fouling, BDD-based EO is considered a promising pre-treatment option for future NF applications. |
| first_indexed | 2024-12-16T12:54:04Z |
| format | Article |
| id | doaj.art-de5448dbfdd14956b9925d234e3df198 |
| institution | Directory Open Access Journal |
| issn | 0160-4120 |
| language | English |
| last_indexed | 2024-12-16T12:54:04Z |
| publishDate | 2021-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Environment International |
| spelling | doaj.art-de5448dbfdd14956b9925d234e3df1982022-12-21T22:31:05ZengElsevierEnvironment International0160-41202021-01-01146106291Boron-doped diamond (BDD) electro-oxidation coupled with nanofiltration for secondary wastewater treatment: Antibiotics degradation and biofoulingXing Du0Zhuoyu Mo1Ziyang Li2Wenxiang Zhang3Yunlong Luo4Jinxu Nie5Zhihong Wang6Heng Liang7School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, PR China; Corresponding authors.School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, PR ChinaSchool of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, PR ChinaSchool of Environmental Science and Engineering, Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou 510006, PR ChinaGlobal Centre for Environmental Remediation (GCER), University of Newcastle, Callaghan, NSW 2308, AustraliaSchool of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, PR ChinaSchool of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, PR ChinaState Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin 150090, PR China; Corresponding authors.In this study, a boron-doped diamond (BDD) electro-oxidation technology coupled with nanofiltration membrane (EO-NF) technology was investigated for its effectiveness in removing antibiotics (i.e., sulfamethazine:SMZ) and mitigating biofouling during secondary wastewater treatment. The result showed that EO obtained an effective SMZ removal, owing to the ·OH generation observed by Electron paramagnetic resonance (EPR) analysis; complete elimination of SMZ was found under the high current density (30 mA/cm2) and long Electrolysis Time (ET = 60 min). Meanwhile, EO-NF process enabled to reduce COD content from 60 mg/L to nearly 5 mg/L. Furthermore, regardless of the effect of EO process, NF could retain most NH3-N because of the excellent performance of NF for ions rejection, and its permeate concentration was below 0.5 mg/L. EO was able to reduce membrane fouling notably, increasing the final flux (15 L/(m2·h)) of NF by 25.1% during long-term operation (240 h). Scanning electron microscopy-Energy dispersive spectrometry (SEM-EDS) showed that a porous layer formed on the vicinity of NF membrane in the case of filtrating EO effluent, in contrast to a uniform and dense biofouling layer generated during the direct NF. Besides, the content of adenosine triphosphate (ATP) and the number of bacterial colonies in the retentate of the EO-NF process were greater than those of the direct NF process. This resulted in a smaller amount of extracellular polymeric substances (EPS) attaching to the membrane surface, decreasing the tightness and hardness of the fouling layer in the case of EO, as indicated by CLSM analysis. Overall, considering its ability to effectively eliminate persistent contaminants and reduce membrane fouling, BDD-based EO is considered a promising pre-treatment option for future NF applications.http://www.sciencedirect.com/science/article/pii/S0160412020322467Electro-oxidationNanofiltrationAntibioticsBiofoulingWastewater reuse |
| spellingShingle | Xing Du Zhuoyu Mo Ziyang Li Wenxiang Zhang Yunlong Luo Jinxu Nie Zhihong Wang Heng Liang Boron-doped diamond (BDD) electro-oxidation coupled with nanofiltration for secondary wastewater treatment: Antibiotics degradation and biofouling Environment International Electro-oxidation Nanofiltration Antibiotics Biofouling Wastewater reuse |
| title | Boron-doped diamond (BDD) electro-oxidation coupled with nanofiltration for secondary wastewater treatment: Antibiotics degradation and biofouling |
| title_full | Boron-doped diamond (BDD) electro-oxidation coupled with nanofiltration for secondary wastewater treatment: Antibiotics degradation and biofouling |
| title_fullStr | Boron-doped diamond (BDD) electro-oxidation coupled with nanofiltration for secondary wastewater treatment: Antibiotics degradation and biofouling |
| title_full_unstemmed | Boron-doped diamond (BDD) electro-oxidation coupled with nanofiltration for secondary wastewater treatment: Antibiotics degradation and biofouling |
| title_short | Boron-doped diamond (BDD) electro-oxidation coupled with nanofiltration for secondary wastewater treatment: Antibiotics degradation and biofouling |
| title_sort | boron doped diamond bdd electro oxidation coupled with nanofiltration for secondary wastewater treatment antibiotics degradation and biofouling |
| topic | Electro-oxidation Nanofiltration Antibiotics Biofouling Wastewater reuse |
| url | http://www.sciencedirect.com/science/article/pii/S0160412020322467 |
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