Performance of nitrobenzene and its intermediate aniline removal by constructed wetlands coupled with the micro-electric field

Wang, Hao; Zhang, Lei; Tian, Yuan; Yang, Jia; Bo, Guozhu; Luo, Litao; Liu, Lin; Shi, Guoyuan; Li, Fuping

doi:10.1016/j.chemosphere.2020.128456

Cited by 27 publications

(6 citation statements)

References 36 publications

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“…Aniline usually appears in industries such as printing, dyeing and making resins, attracting a lot of attention due to its severe toxicity and difficult degradation. 1 Statistics demonstrate that in recent years, aniline discharged into the water environment all over the world has reached about 30 000 tons per year, 2 while aniline emission in China is as high as about 2200 tons per year. 3 As described, the difficulty of aniline degradation has reached new heights.…”

Section: Introductionmentioning

confidence: 99%

Solving the problem of high concentration aniline inhibiting nitrogen removal: starting the SBBR with the prolonged aeration mode

Lin

Zhang

et al. 2023

Environ. Sci.: Water Res. Technol.

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Section: Introductionmentioning

confidence: 99%

Solving the problem of high concentration aniline inhibiting nitrogen removal: starting the SBBR with the prolonged aeration mode

Lin

Zhang

et al. 2023

Environ. Sci.: Water Res. Technol.

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“…Nitrobenzene (NB) is widely used in various industrial processes, including printing and dyeing, synthesis of pharmaceuticals and chemicals, and the production of explosives and petrochemicals. More than 12000 tons of NB are presently discharged annually into the environment worldwide, which could cause serious environmental pollution and human health concerns (Wang et al 2021). NB has a stable structure because of a strong electron-absorbing nitrobenzene (-NO 2 ) component and is di cult to decompose using common oxidants.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Pt-Nd co-doped Ti/SnO2-Sb nanosphere electrodes prepared using the hydrothermal method

Li,

Ma,

et al. 2023

Preprint

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Ti/SnO2-Sb electrodes possess high catalytic activity and efficiently degrade nitrobenzene; however, their low service life limits their wide application. In this study, we used one-step hydrothermal synthesis to successfully prepare Pt-Nd co-doped Ti/SnO2-Sb nanosphere electrodes. Scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy were applied to characterize the surface morphology, microstructure and chemical composition of the electrodes, respectively. The electrochemical activity and stability of the electrodes were characterized via linear sweep and cyclic voltammetry, electrochemical impedance spectroscopy, and an accelerated service life test; their performance for nitrobenzene (NB) degradation was also studied. An appropriate amount of Pt-Nd co-doping refined the average grain size of SnO2 and formed a uniform and compact coating on the electrode surface. The oxygen evolution potential, total voltammetric charge, and electron transfer resistance of the Ti/SnO2-Sb-Nd-Pt electrodes were 1.88 V, 3.77 mC/cm2, and 11.50 Ω, respectively. After Pt-Nd co-doping, the accelerated service life of the electrodes was extended from 8.0 min to 78.2 h (500 mA/cm2); although the NB degradation rate decreased from 94.1–80.6%, the total amount of theoretical catalytic degradation of NB in the effective working time increased from 17.4 mg/cm2 to 8754.1 mg/cm2. These findings reveal good application potential for the electrodes and provide a reference for developing efficient and stable electrode materials.

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“…[34,39,40] However, a high conversion rate of NB to AN was only obtained at cathode potentials more negative than À700 mV, which means that electrical power is needed to drive the BESs in MEC operation. [41][42][43] In our previous report, a single-chamber microbial fuel cell (S-MFC) assembled with a bioanode and an activated carbon (AC) air cathode exhibits a higher performance of NB removal and concomitant electricity production, [44] but the pathway of NB removal from solutions in S-MFCs is unclear. The use of an AC air cathode is unique compared to other types of NBremoving MECs.…”

Section: Introductionmentioning

confidence: 99%

Dual functions of activated carbon air‐cathode: Nitrobenzene removal and electricity production in microbial fuel cells

et al. 2022

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The removal of nitrobenzene (NB) in microbial electrochemical systems generally requires electrical power to operate systems in the mode of microbial electrolysis cells (MECs). The present study demonstrates that single‐chamber microbial fuel cells (S‐MFCs) assembled with a bioanode and an activated carbon (AC) air cathode could simultaneously remove NB and generate electricity. S‐MFCs with 1 mM NB exhibit long term NB tolerance and stable electricity production, with NB removal up to 98% in an operation cycle and a maximum power of 16.2 ± 1.3 W m−3. High NB loadings significantly inhibited the activity of anodic biofilms, but the inhibition was reversible. Investigating the removal of NB and its reduction product aniline (AN) in different operations supported the fact that the adsorption at the AC air cathode is the main pathway for the removal of NB and AN from solution, except for the partial conversion of NB to AN by anaerobic reduction in solution. In S‐MFCs, the activated carbon in the cathode plays both functions: catalyzing the oxygen reduction reaction and adsorbing NB and AN, so that the S‐MFC assembled with the AC air cathode, unlike most NB removing MECs, functions as a system with both NB removal and electricity production.

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Performance of nitrobenzene and its intermediate aniline removal by constructed wetlands coupled with the micro-electric field

Cited by 27 publications

References 36 publications

Solving the problem of high concentration aniline inhibiting nitrogen removal: starting the SBBR with the prolonged aeration mode

Solving the problem of high concentration aniline inhibiting nitrogen removal: starting the SBBR with the prolonged aeration mode

Characterization of Pt-Nd co-doped Ti/SnO2-Sb nanosphere electrodes prepared using the hydrothermal method

Dual functions of activated carbon air‐cathode: Nitrobenzene removal and electricity production in microbial fuel cells

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