Boron-doped diamond (BDD) electro-oxidation coupled with nanofiltration for secondary wastewater treatment: Antibiotics degradation and biofouling

Du, Xing; Mo, Zhuoyu; Zhang, Wenxiang; Luo, Yunlong; Nie, Jun; Wang, Zhihong; Liang, Heng

doi:10.1016/j.envint.2020.106291

Cited by 41 publications

(8 citation statements)

References 43 publications

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Section: Methodsmentioning

confidence: 99%

“…Surface chemical components, wettabilities, roughnesses, and surface/cross-sectional morphologies of both NF and PNF membranes were determined by an XPS (ESCALAB 250Xi, USA), ATR-FTIR (NEXUS, USA), contact angle analyzer (Theta, Finland), AFM (Multimode 8, USA), and FE-SEM (JSM-6390LV, Japan), respectively. The distribution of proteins on the fouled/rinsed membrane skin layers with the assistance of fluorescence dye was visualized by confocal laser scanning microscopy (CLSM) following the methods developed by Du et al 31 In terms of their precursors, the chemical structure, elemental compositions, surface morphologies, and wettabilities of these photocatalysts were also determined by the aforementioned ATR-FTIR, XPS, FE-SEM, and contact angle analyzer, respectively. In addition, the crystal structure was determined by an XRD (X' Pert3 Powder, Netherlands).…”

Section: Experimental Protocolmentioning

confidence: 99%

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Synchronous Removal of Small-Sized Antibiotics by a Bifunctional Photocatalytic Nanofiltration Membrane in a Continuous Flow-Through Process under Multiple Influent Matrices

Song

Chen

et al. 2022

ACS EST Water

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Bifunctional photocatalytic nanofiltration (PNF) membranes are of increasing significance in removing micropollutants in the actual water environment, but there are still critical bottlenecks that greatly limit their practicality. In this work, a metal-free and visible light-responsive surface-anchored PNF membrane was fabricated for simultaneously and efficiently removing target antibiotics from real river water in a continuous flow-through process. The results exhibited that the optimal PNF-3 membrane was expectedly consisted of an inside tight sub-nanopore structured separation layer and an outside thinner, super hydrophilic mesoporous degradation layer. Consequently, the PNF-3 membrane irradiated via visible light exhibited outstanding removal rates of sulfamethoxazole, trimethoprim, and chloramphenicol (between 99.0 and 99.9%), accompanied with almost constant high water permeability. In addition, after repeating the fouling–physical rinsing process three times that lasted for 60 h, only sporadic adherent contaminants remained on the top surface, together with minimal total and irreversible fouling ratios (only 7.9 and 1.2%), strongly proving that the PNF-3 membrane displayed good self-cleaning performance. In addition, the acute and chronic biotoxicities of its permeate to Virbrio qinghaiensis sp. -67 were also reduced significantly to 11.4 and 10.1%, respectively. This study might provide valuable insights into the continuous enhancement of the practicality and effectiveness of PNF membranes in micro-polluted water purification scenarios.

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Section: Methodsmentioning

confidence: 99%

Section: Experimental Protocolmentioning

confidence: 99%

Synchronous Removal of Small-Sized Antibiotics by a Bifunctional Photocatalytic Nanofiltration Membrane in a Continuous Flow-Through Process under Multiple Influent Matrices

Song

Chen

et al. 2022

ACS EST Water

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“…In terms of biofilm characterization, the biofilm morphology was determined using scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM−EDS, SU8220, Hitachi, Japan) and the primary sampling and pretreatment procedures are elaborated in Text S4. 38 The micromorphology of the membrane surface and biofilm was analyzed by confocal laser scanning microscopy (CLSM), with the detailed description presented in Text S4. The primary sample preparation and preservation processes also are given in Text S4.…”

Section: Water Quality Parameters Determination and Biofilmmentioning

confidence: 99%

Flux Improvement and Biofilm Performance of an Oblique Gravity-Driven Ceramic Membrane Bioreactor Coupled with Electrocoagulation for Roofing Rainwater Purification

Du,

Ma,

Liang

et al. 2023

ACS EST Eng.

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In stormwater harvesting, an effective method to avoid flooding risk and pollutant migration, the collected roofing rainwater can meet part of the domestic water demand and alleviate the water resources crisis. In the current work, an innovative oblique membrane tank layout mode was involved in the electrocoagulation coupled with a gravity-driven ceramic membrane bioreactor (EC/GDCMBR), which was suitable for distributed roof rainwater treatment facilities in rural water-scarce areas. The oblique-EC/GDCMBR system could improve the biofilm formation and porosity in the membrane tank to realize rainwater treatment and reuse. Compared with the traditional layout of lateral-EC/GDCMBR during the long-term operation of 82 days, the oblique-EC/GDCMBR system not only presented the improved permeation flux of ∼40 LMH compared to that of lateral-EC/GDCMBR (∼34 LMH), but also exhibited a lower irreversible fouling resistance (oblique: 1.68 × 10 9 m −1 vs. lateral: 2.02 × 10 9 m −1 ). Moreover, the biofilm characteristics were determined to evaluate the improved flux and biofilm in oblique-EC/GDCMBR. Confocal laser scanning microscopy (CLSM) and adenosine triphosphate (ATP) contents also confirmed the higher biological activity in oblique-EC/GDCMBR. The abundance of Denitratisoma (∼15.38%) in the sludge and Nitrospira (∼3.35%) in the biofilm explained the different nitrogen removal approaches in oblique-EC/GDCMBR. Besides, oblique-EC/GDCMBR exhibited excellent water purification performance with the standard effluent water quality. In a word, this work presents the advantage and reliability of oblique-EC/GDCMBR for roofing rainwater sustainable treatment.

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“…Boron doped diamond (BDD) has been used as a substrate material for deposition of metal nanoparticles used in sensing and degradation applications. [19][20][21] Particularly, BDD is widely used due to its inertness towards poisoning within a wide potential window and high stability at high current densities [22][23][24][25] . For example, excessive polarisation of BDD for 250 hours in 1M H2SO4 at 1 A/cm 2 shows no sign of etching 26 , confirming the stability of BDD.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical decarboxylation of acetic acid on boron-doped diamond and platinum-functionalised electrodes for pyrolysis-oil treatment

et al. 2023

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Boron-doped diamond (BDD) electro-oxidation coupled with nanofiltration for secondary wastewater treatment: Antibiotics degradation and biofouling

Cited by 41 publications

References 43 publications

Synchronous Removal of Small-Sized Antibiotics by a Bifunctional Photocatalytic Nanofiltration Membrane in a Continuous Flow-Through Process under Multiple Influent Matrices

Synchronous Removal of Small-Sized Antibiotics by a Bifunctional Photocatalytic Nanofiltration Membrane in a Continuous Flow-Through Process under Multiple Influent Matrices

Flux Improvement and Biofilm Performance of an Oblique Gravity-Driven Ceramic Membrane Bioreactor Coupled with Electrocoagulation for Roofing Rainwater Purification

Electrochemical decarboxylation of acetic acid on boron-doped diamond and platinum-functionalised electrodes for pyrolysis-oil treatment

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