Kinetic study of degradation of p-nitro phenol by a mixed bacterial culture and its constituent pure strains

Chakraborty, Bhaswati

doi:10.1016/j.matpr.2016.10.034

Cited by 12 publications

(7 citation statements)

References 6 publications

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“…N2 sorption isotherms of FeVO4, BiOCl and FeVO4@BiOCl p-n heterojunction and pore size distributions (BJH) are displayed in Fig. 6. The isotherms of all the catalysts are type-IV adsorption isotherms with an H3 hysteresis loop according to the IUPAC classification [49].…”

Section: N2 Adsorption-desorption Isothermmentioning

confidence: 99%

“…PNP has been classified as a priority pollutant by the United States Environmental Protection Agency (EPA), with a range of 1-20 ppb as a maximum allowed concentration in drinking water [5]. It is highly toxic to many living organisms, poses significant health and environmental risks and causes lung edema, central nervous system disorders, renal failure, skin, respiratory tract, myocardial depression and eye irritation [6]. PNP decays in surface water but, takes a long time in deep soil and in groundwater.…”

Section: Introductionmentioning

confidence: 99%

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Core/shell FeVO4@BiOCl heterojunction as a durable heterogeneous Fenton catalyst for the efficient sonophotocatalytic degradation of p-nitrophenol

Eshaq

Wang

Sun

et al. 2020

Separation and Purification Technology

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In this study, a FeVO4@BiOCl p-n heterojunction with n-type porous FeVO4 nanorods as the core and p-type flower-like BiOCl nanostructures as the shell was successfully prepared by a facile hydrothermal method. The novel heterostructure was investigated as a durable heterogeneous Fenton catalyst for ultrasonic irradiation (US), ultraviolet irradiation (UV) and coupling irradiation systems (US/UV). Characterization of FeVO4@BiOCl core shell heterojunction was conducted by XRD, SEM, EDS elemental mapping, TEM, HRTEM, SAED, FTIR, Raman, BET, PZC, XPS and DRS. Several different experimental parameters, including irradiation time, H2O2 concentration, catalyst amount, initial concentration, and pH value, were optimized. The stability and reusability of the prepared FeVO4@BiOCl core shell heterojunction were evaluated as well. Mineralization experiments were carried out using the optimized parameters. The results showed that FeVO4@BiOCl core shell heterojunction exhibits a superior sonophotocatalytic performance compared to either sonocatalysis or photocatalysis. Moreover, the formation of p-n core@shell nanostructures could significantly increase the pHpzc, and to an excellent stability for the degradation of PNP after six cycles. The remarkable enhancement of the degradation performance of FeVO4@BiOCl core shell heterojunction can be attributed to the unique structure and morphology with a matched energy band structure owing to the internal electric field induced by the p-n junction, a high transfer efficiency and the efficient separation of e -/h + pairs, resulting in a huge number of reactive species for the degradation of PNP. A plausible mechanism over FeVO4@BiOCl core shell heterojunction for the sonophotocatalytic degradation of PNP is proposed based on a special three-way, i.e. one as a photocatalyst and a two-way Fenton-like mechanism with the dissociation of H2O2. Active species trapping and calculated band gap energy were also discussed.

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Section: N2 Adsorption-desorption Isothermmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Core/shell FeVO4@BiOCl heterojunction as a durable heterogeneous Fenton catalyst for the efficient sonophotocatalytic degradation of p-nitrophenol

Eshaq

Wang

Sun

et al. 2020

Separation and Purification Technology

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“…Removal of the pollutants can be executed in different ways such as adsorption or degradation; biodegradation has also been utilized to remove these chemicals from the environment. [1][2][3][4][5][6][7][8] In several studies, a given or a mixture of microorganism(s) was described to effectively degrade the target chemical. Natural materials or their extract which contain a mixture of microorganisms such as soil microflora could also eliminate the target compounds.…”

Section: Introductionmentioning

confidence: 99%

“…Natural materials or their extract which contain a mixture of microorganisms such as soil microflora could also eliminate the target compounds. [6][7][8] Sedimentary rocks from which oil can be extracted are commonly referred as oil shale. Oil shale is a lamellar sedimentary rock consisting of main residue of Botryococcus braunii microalgae, calcite, illite, and montmorillonite.…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of two persistent aromatic compounds by using oil shale

Molnár

Hoffer

Krisch

et al. 2021

Journal of Environmental Science and Health, Part B

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Low-cost oil shale was investigated as a biodegradation promoter material, in order to exploit its potential for more widespread and efficient usage in the elimination of pollution. Degradation of two model pollutants, 4-nitrophenol and phenol, was examined in the presence of oil shale in a batch system. In order to investigate the role of the natural microflora of the oil shale in degradation, sodium azide was added to inhibit microbial growth. The effect of metal ions was also investigated. In the sodium azide-free solutions the model pollutants were completely degraded up to 2000 mmol/L concentration in a dose-dependent way, while the addition of sodium azide delayed greatly but did not stop the degradation. Manganese(II) ions increased the rate of the degradation of 4-nitrophenol, and given quantities of iron(II), manganese(II) or zinc(II) ions were also effective in degradation of phenol. Our results suggest that oil shale is not only an adsorbent but has an active role in the degradation of pollutants by its natural microflora. Utilizing these features of oil shale, it is a suitable candidate as an ameliorating agent, which can also be used in industrial size.

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“…Maximum contaminant level in drinking water of p‐Nitrophenol (p‐NP) is recommended to be 1 μg/L . The prognostications of p‐NP are irritation in the eyes, skin, respiratory tract, and mucous membranes, and it can cause renal insufficiency, pulmonary edema, central nervous system disorders, and myocardial depression . Therefore, the removal of p‐NPs from contaminated sources are paramount significance.…”

Section: Introductionmentioning

confidence: 99%

The use of M@p(4‐VP) and M@p (VI) (M:Co, Ni, Cu) cryogel catalysts as reactor in a glass column in the reduction of p‐nitrophenol to p‐aminophenol under gravity

Şahiner

Demirci

2019

Asia-Pacific J Chem Eng

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In this study, metal@p(4‐Vinyl pyridine) (M@p(4‐VP)) and metal@p (vinyl imidazole) (M@p (VI)) (M: Co, Ni, and Cu) cryogel catalysts as continuous reactor were used in reduction of p‐nitrophenol (p‐NP) to p‐amino phenol (p‐AP). The aqueous solution of p‐NP passed through these super porous cryogel catalysts under gravity, and reaction kinetic for p‐AP generation was investigated. The effect of metal species, amount of p‐NP solution, amount of metal nanoparticle (increased by loading/reducing cycles), and temperature on the reduction reaction for p‐NP to p‐AP catalyzed by M@p(4‐VP) and M@p (VI) cryogel catalysts were investigated. It was found that Co@p(4‐VP) and Co@p (VI) cryogel catalysts provided the best catalytic performances than the other used metal species with 2.19 and 1.37 mol p‐NP/(mol catalyst.min)−1 turn‐over frequency (TOF) values. Furthermore, in addition better TOF values, low Ea values of the prepared Co@p(4‐VP) and Co@p (VI) cryogel catalysts with the values of 18.9 ± 1.3, and 25.4 ± 1.8 kJ/mol were found to be better than most of the similar works reported in the literature.

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Kinetic study of degradation of p-nitro phenol by a mixed bacterial culture and its constituent pure strains

Cited by 12 publications

References 6 publications

Core/shell FeVO4@BiOCl heterojunction as a durable heterogeneous Fenton catalyst for the efficient sonophotocatalytic degradation of p-nitrophenol

Core/shell FeVO4@BiOCl heterojunction as a durable heterogeneous Fenton catalyst for the efficient sonophotocatalytic degradation of p-nitrophenol

Biodegradation of two persistent aromatic compounds by using oil shale

The use of M@p(4‐VP) and M@p (VI) (M:Co, Ni, Cu) cryogel catalysts as reactor in a glass column in the reduction of p‐nitrophenol to p‐aminophenol under gravity

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